2004 Lexus IS Exhausts

    • MagnaFlow®Street Series Stainless Steel Cat-Back Exhaust System
      $915.38$732.30
      (0)
      Lexus IS 2004, Street Series Stainless Steel Cat-Back Exhaust System by MagnaFlow®, MODERATE SOUND. Single Rear Exit. 2.5" Tubing. 5" x 8" x 14" Muffler. 5" x 14" Resonator. 4" Polished Stainless Tip. The Street Series is designed...
      # 20206589
    • Spec-D®N1 Style Cat-Back Exhaust System with Burnt Tip (2.5" Inlet)
      $133.60$106.88
      (1)
      Lexus IS 2004, N1 Style Cat-Back Exhaust System with Burnt Tip (2.5" Inlet) by Spec-D®. Make whatever you drive run and sound like a high-performance machine with a Spec-D Exhaust System. The Spec-D system replaces your restrictive...
      Dramatically improved exhaust flow compared to restrictive stock systemImproved engine breathing enables increased power output for better performance
      # 12205987
    • MagnaFlow®Direct Fit Catalytic Converter
      $1,176.38$941.10
      (0)
      Lexus IS 2004, Direct Fit Catalytic Converter by MagnaFlow®. 23.75" Wide. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the...
      # 22208639
    • MagnaFlow®Direct Fit OEM Grade Catalytic Converter
      $620.79from $496.63
      (0)
      Lexus IS 2004, Direct Fit OEM Grade Catalytic Converter by MagnaFlow®. Wide. Without Air Tube. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will...
      # 22208641
    • MagnaFlow®Direct Fit California OBDII Catalytic Converter
      $694.34from $555.47
      (0)
      Lexus IS 2004, Direct Fit California OBDII Catalytic Converter by MagnaFlow®. 21.75" Wide. Includes Gasket. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This...
      # 42443249
    • MagnaFlow®Direct Fit Federal Pre-OBDII Catalytic Converter
      $833.18$666.54
      (0)
      Lexus IS 2004, Direct Fit Federal Pre-OBDII Catalytic Converter by MagnaFlow®. 2.5" Inlet / 2.5" Outlet Diameter. 23.75" Wide. Without Air Tube. If your car needs replacement, install one that will get you through the smog check...
      # 22197052
    • MagnaFlow®Direct Fit Federal Pre-OBDII Catalytic Converter
      $433.61$346.89
      (0)
      Lexus IS 2004, Direct Fit Federal Pre-OBDII Catalytic Converter by MagnaFlow®. 2.5" Inlet / 2.5" Outlet Diameter. 21.75" Wide. Without Air Tube. If your car needs replacement, install one that will get you through the smog check...
      # 22198460
    • Flowmaster®Delta Force™ Low Profile Oval Tubing Race Muffler
      $372.49$297.99
      (0)
      Universal Delta Force™ Aluminized Steel Low Profile Oval Tubing Race Muffler by Flowmaster®, Aggressive Sound, 3.50" Dual Inlet / 3.50" Dual Outlet, 2.75 Thick x 11" Wide x 25" Length. The low profile mufflers are Delta Flow™...
      # 898448
    • Flowmaster®30 Series Delta Force™ 3-Chamber Race Muffler
      $199.99from $159.99
      (0)
      Universal 30 Series Delta Force™ 3-Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. These are the most powerful and the quietest professional race mufflers available. 5.00” & 6.00” thick case sizes for maximum power and...
      # 898450
    • Flowmaster®Outlaw™ Race Muffler
      $112.49from $89.99
      (1)
      Universal Outlaw™ Race Muffler by Flowmaster®, AGGRESSIVE SOUND. These mufflers are very small and lightweight. Attached directly to the collector they generally produce more power than open headers, while taking “the edge”...
      # 898456
    • Flowmaster®Pro Series™ Stainless Steel Race Muffler with Turn Down
      $224.99$179.99
      (1)
      Universal Pro Series™ Stainless Steel Race Muffler with Turn Down by Flowmaster®, MODERATE SOUND, 6" Diameter x 16" Case Length. Laminar Flow Mufflers have applications in all forms of racing. The Cool Shell Technology makes...
      # 898465
    • Flowmaster®Scavenger Series Race Collector Muffler
      $261.24$208.99
      (0)
      Universal Scavenger Series Race Collector Muffler by Flowmaster®. These Delta Force Mufflers are designed to attach directly to the exhaust header primary tubes, replacing the collector in sprint and drag racing applications. They...
      # 898468
    • Flowmaster®40 Series Delta Force™ 2-Chamber Race Muffler
      $126.21from $100.97
      (0)
      Universal 40 Series Delta Force™ 2-Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. The 40-Series mufflers offer a combination of maximum power and substantial dB-reduction compared to open headers. They are recommended for...
      # 898479
    • Flowmaster®10 Series Delta Force Single Chamber Race Muffler
      $94.53from $75.62
      (0)
      Universal 10 Series Delta Force Single Chamber Race Muffler by Flowmaster®, AGGRESSIVE SOUND. The 10 Series Race mufflers are a compact lightweight single chamber design that will give a noticeable sound reduction compared to open...
      # 898490
    • Flowmaster® 60 Series Delta Force Stainless Steel Race Muffler
      $234.99$187.99
      (0)
      Universal 60 Series Delta Force Stainless Steel Race Muffler by Flowmaster®, MODERATE SOUND, 4" Offset Inlet / 4" Offset Outlet, 22" Length. These are the most powerful and the quietest professional race mufflers available.
      # 3146020
    • Flowmaster®Scavenger Series Outlaw II Race Collector Muffler
      $223.75from $179.00
      (0)
      Universal Scavenger Series Outlaw II Race Collector Muffler by Flowmaster®. These Delta Force Mufflers are designed to attach directly to the exhaust header primary tubes, replacing the collector in sprint and drag racing...
      # 23297627
    • Flowmaster®60 Series Delta Flow™ Muffler
      $156.24$124.99
      (0)
      Universal 60 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, MILD SOUND, 2.25" Center Inlet / 2.25" Center Outlet, 5" Thick x 10" Wide x 13" Case Length x 19" Overall Length. The 60 Series increases horsepower and...
      # 897052
    • Flowmaster®40 Series Delta Flow™ Muffler
      $112.49from $89.99
      (1)
      Universal 40 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The 2-chamber design of this muffler, incorporating the patented Flowmaster Delta Flow...
      # 897054
    • Flowmaster®40 Series Original Muffler
      $103.74$82.99
      (0)
      Universal 40 Series Original Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the muffler that launched the success of Flowmaster. It is an aggressive sounding...
      # 897079
    • Flowmaster®50 Series Delta Flow™ Big Block Muffler
      $212.49$169.99
      (0)
      Universal 50 Series Delta Flow™ Aluminized Steel Big Block Muffler by Flowmaster®, MILD SOUND, 5" Thick x 12" Wide x 22" Case Length x 28" Overall Length. The 50 Series Big Block Muffler is Flowmaster’s largest and quietest...
      # 897082
    • Flowmaster®50 Series Delta Flow™ Muffler
      $127.49from $101.99
      (0)
      Universal 50 Series Delta Flow™ Muffler by Flowmaster®, MODERATE SOUND, 4" Thick x 9.75" Wide x 17" Case Length x 23" Overall Length. The 50 Series Delta Flow mufflers are designed for passenger cars. The sound characteristics...
      # 897086
    • Flowmaster®50 Series HD Delta Flow™ Muffler
      $193.74$154.99
      (0)
      Universal 50 Series HD Delta Flow™ Muffler by Flowmaster®, MODERATE SOUND, 4" Thick x 9.75" Wide x 18" Case Length x 23" Overall Length. The 50 Series HD Delta Flow mufflers are big mufflers for big trucks. With 4” internal...
      # 897102
    • Flowmaster®70 Series Delta Flow™ Big Block Muffler
      $181.24$144.99
      (0)
      Universal 70 Series Delta Flow™ Big Block Muffler by Flowmaster®, MILD SOUND, 5" Thick x 10" Wide x 22" Case Length x 28" Overall Length. The 70 Series Big Block II Muffler uses a longer case for increased volume and added...
      # 897109
    • Flowmaster®HP-2™ Laminar Flow™ Perfomance Muffler
      $131.24from $104.99
      (1)
      Universal HP-2™ Laminar Flow™ Perfomance Muffler by Flowmaster®, MODERATE SOUND. HP-2 Performance Mufflers is the Hot-Rodder’s Dream Muffler. It is a true high performance muffler and yet it is small enough for street rod...
      # 897113
    • Flowmaster®Super 10 Series Delta Flow™ Stainless Steel Muffler
      $87.49$69.99
      (3)
      Universal Super 10 Series Delta Flow™ Stainless Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 5.50" Case Length x 12.50" Overall Length. If you want to be arrested, you should mount this muffler on your...
      # 897126
    • Flowmaster®Super 40 Series Delta Flow™ Muffler
      $113.63from $90.90
      (0)
      Universal Super 40 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 5" Thick x 10" Wide x 13.50" Case Length x 19.50" Overall Length. The Super 40 Series Delta Flow Mufflers are developed from the Top Ten muffler...
      # 897132
    • Flowmaster®Super 44 Series Delta Flow™ Muffler
      $99.94from $79.95
      (2)
      Universal Super 44 Series Delta Flow™ Muffler by Flowmaster®, AGGRESSIVE SOUND, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The Super 44 has the deepest, richest, most aggressive muscle tone of all 4” street...
      # 897136
    • Flowmaster®Super 50 Series Delta Flow™ (SUV) Performance Muffler
      $162.49from $129.99
      (0)
      Universal Super 50 Series Delta Flow™ (SUV) Performance Muffler by Flowmaster®, MODERATE SOUND, 5" Thick x 10" Wide x 17" Case Length x 23" Overall Length. The Super 50 is suitable for everyday driving. Its large resonance...
      # 897149
    • Flowmaster®50 Series Delta Flow™ Slimline Muffler
      $166.24$132.99
      (0)
      Universal 50 Series Delta Flow™ Slimline Muffler by Flowmaster®, MODERATE SOUND. The 50 Series Delta Flow Slimline mufflers are designed for passenger cars. The sound characteristics are moderate exterior sound level and minimal...
      # 897156
    • Flowmaster®Pro Series™ Laminar Flow Muffler
      $174.99from $139.99
      (0)
      Universal Pro Series™ Laminar Flow Muffler by Flowmaster®, MODERATE SOUND. PRO Laminar Flow mufflers have a patented core design that is characterized by efficient exhaust scavenging and minimized drone. They produce a rich, deep...
      # 897161
    • Flowmaster®Super HP-2™ Stainless Steel Performance Muffler
      $131.24from $104.99
      (0)
      Universal Super HP-2™ Stainless Steel Performance Muffler by Flowmaster®, 4" Thick x 5" Wide. The new Super HP-2 Series muffler offers the same great performance benefits and moderate tone that you would expect from our laminar...
      # 15943155
    • Borla®S-Type™ Stainless Steel Round Muffler
      $215.58$175.99
      (7)
      Universal S-Type™ Stainless Steel Round Muffler by Borla®. Get increased performance and the aggressive sound of power with this Universal S-Type Muffler. This is the same style austenitic stainless steel straight through muffler...
      # 25728287
    • Borla®XR-1™ Multicore Stainless Steel Race Muffler
      $306.24from $244.99
      (0)
      Universal XR-1™ Multicore Stainless Steel Race Muffler by Borla®. The Borla XR-1 Multi-Core Muffler was developed on the race track to quiet the most severe engine noise without restricting power. They work so well that they're...
      # 959705
    • Borla®Heavy Duty Stainless Steel Round Muffler
      $262.49$209.99
      (0)
      Universal Heavy Duty Stainless Steel Round Muffler by Borla®, 3" Center Inlet / 3" Center Outlet. Get increased performance and the aggressive sound of power with this Heavy Duty Stainless Steel Round Muffler. This muffler includes...
      # 25728296
    • Gibson®CFT Superflow™ Oval Muffler
      $96.30from $77.04
      (0)
      Universal CFT Superflow™ Oval Muffler by Gibson®. Get optimum usable power and a deep powerful sound with a Gibson CFT Superflow Muffler. The CFT Superflow has one of the lowest restriction ratings of any muffler on the market,...
      # 2060024
    • Gibson®SFT Superflow™ Round Muffler
      $105.04from $84.03
      (1)
      Universal SFT Superflow™ Round Muffler by Gibson®. Get increased exhaust flow for more power and great sound with a Gibson SFT Superflow Muffler. The SFT Superflow has one of the lowest restriction ratings of any muffler on the...
      # 2060137
    • Gibson®Race Muffler
      $193.55$154.84
      (0)
      Universal Race Muffler by Gibson®. Inspite of the large host of engineers and technicians, Gibson Performance has not lost its commitment to building cost-effective exhaust systems that deliver more performance for less spendings....
      Heavy Duty Mandrel Bent Tubing50 State Emissions Llegal
      # 26542951
    • Gibson®8" Round Muffler
      $205.59from $164.47
      (0)
      Universal 8" Round Muffler by Gibson®, 3.5" Center Inlet / 3.5" Center Outlet, 24" Length. Get increased exhaust flow for more power and great sound with a Gibson Muffler. The straight through, baffled and chambered design gives...
      # 26542948
    • MBRP®Pro Series™ Stainless Steel Oval Core Muffler
      $1,248.75$103.99
      (0)
      Universal Pro Series™ T304 Stainless Steel Oval Muffler by MBRP®. These Pro Series mufflers utilize a chambered-core construction for a mellower but unmistakably MBRP sound character. They’re fabricated from long-lasting T304...
      Polished T304 stainless steelChambered core
      # 14447764
    • MBRP®Installer Series™ Aluminized Steel Oval Core Muffler
      $58.48$46.78
      (0)
      Universal Installer Series™ Aluminized Steel Oval Core Muffler by MBRP®. These Installer Series mufflers utilize a chambered-core construction for a mellower but unmistakably MBRP sound character. They’re fabricated from...
      Aluminized constructionChambered core
      # 14447537
    • MBRP®XP Series™ Stainless Steel Oval Core Muffler
      $1,248.75from $60.61
      (0)
      Universal XP Series™ T409 Stainless Steel Oval Core Muffler by MBRP®. These XP Series mufflers utilize a chambered-core construction for a mellower but unmistakably MBRP sound character. They’re fabricated from long-lasting...
      Corrosion-resistant T409 stainless steelChambered core
      # 14447775
    • MBRP®Installer Series™ Round Muffler
      $91.99from $73.59
      (1)
      Universal Installer Series™ Aluminized Steel Round Muffler by MBRP®. Short on space under your car for a muffler? A round muffler might just be the ticket to tuck in around a drive shaft or up near the cats. Choose whether you...
      Round form factor for tight spots16GA aluminized steel
      # 3724354
    • MBRP®Pro Series™ T304 Stainless Steel Round Muffler
      $281.24from $224.99
      (0)
      Universal Pro Series™ T304 Stainless Steel Round Muffler by MBRP®. Your car is for show and go; add a little show with this polished T304 stainless steel muffler from MBRP. The mirror finish won’t ever peel, flake or corrode....
      Dual-core designPolished T304 stainless
      # 14446428
    • MBRP®XP Series™ Stainless Steel Round Muffler
      $174.99from $139.99
      (1)
      Universal XP Series™ T409 Stainless Steel Round Muffler by MBRP®. Short on space under your car for a muffler? A round muffler might just be the ticket to tuck in around a drive shaft or up near the cats. Choose whether you want...
      Round form factor for tight spotsPerformance or milder tone
      # 3724348
    • MBRP®Black Series™ Round Muffler
      $187.49from $149.99
      (0)
      Universal Black Series™ Black Aluminized Steel Round Muffler by MBRP®. Black is the new chrome, so here’s a chance to build an all-black exhaust system perfect for your “murdered-out” custom car. Constructed of Aluminized...
      Spiral louver straight-through designHigh density packing ensures long life
      # 3724351
    • aFe®Mach Force XP Stainless Steel Muffler-Delete Pipe
      $93.75$75.00
      (0)
      Universal Stainless Steel Stainless Steel Muffler-Delete Pipe by aFe®, 4" Inlet / 4" Outlet. Eliminate your restrictive muffler for better performance and aggressive sound with this Muffler-Delete Pipe. Factory type connections...
      # 4372303
    • aFe®Mach Force XP Stainless Steel Round Muffler
      $187.50from $150.00
      (0)
      Universal Stainless Steel Round Muffler by aFe®, 30" Overall Length x 8" Diameter. You'll get increased performance and improved throttle response when you install the aFe Universal Fit 409 Stainless Steel Performance Muffler. This...
      # 4372324
    • aFe®Mach Force XP Stainless Steel Oval Muffler
      $156.25from $125.00
      (0)
      Universal Stainless Steel Oval Muffler by aFe®. You'll get increased performance and improved throttle response when you install the aFe Universal Fit 409 Stainless Steel Performance Muffler. This muffler has a deep, throaty,...
      # 4395697
    • Weapon-R®Racing Muffler
      $127.50$102.00
      (8)
      Universal Racing Muffler by Weapon-R®, 3" X 2 Tip Size. Give your car a custom look and dynamic sound with these high-performance mufflers.
      # 290713
    • Weapon-R®Black Muffler
      $175.00$140.00
      (0)
      Universal Black Muffler by Weapon-R®. This muffler is a part of Weapon-R’s Inter-Lock Universal Muffler System. This system allows the length and style of the Exhaust Tip to be changed.
      # 26065987
    • Injen®Universal Muffler
      $210.38from $168.30
      (5)
      Universal Muffler by Injen®. Let loose all the horsepower locked in your engine by your stock restrictive muffler, and experience the sound of that power with the Injen stainless steel universal muffler. This is the same muffler...
      # 379105
    • DC Sports®Muffler Silencer
      $54.71$43.77
      (0)
      Universal Muffler Silencer by DC Sports®. DC Sports exhaust canister silencers fit inside the muffler tip and baffle exhaust noise to reduce overall decibel levels. Our silencers included a pre-drilled hole that aligns with a...
      # 11019440
    • Flowmaster®Resonator
      $87.49from $69.99
      (0)
      Universal Resonator by Flowmaster®. The resonators are designed for use in conjunction with Flowmaster Mufflers for improved sound reduction and minimize interior resonance.
      # 898502
    • MBRP®Resonator
      $87.49from $69.99
      (0)
      Universal Resonator by MBRP®. This resonator will remove freeway drone without adding backpressure to your exhaust system. You’ll appreciate the classic MBRP sound when you use this resonator.
      Straight-through designWill never corrode
      # 3746758
    • Flowmaster®Scavenger X-Pipe Kit
      $248.74from $198.99
      (0)
      Universal Scavenger X-Pipe Kit by Flowmaster®, 5 Pieces. The Patented D-Port design of the Scavenger X-Pipe Kit creates a low-pressure area where the exhaust pulse from one pipe helps pull the next exhaust pulse from the other pipe...
      # 469070
    • Flowmaster®Aluminized Steel Balance H Pipe Kit
      $82.49$65.99
      (0)
      Universal Aluminized Steel Balance H Pipe Kit by Flowmaster®. The H-Pipe Kit mounts ahead of the silencers, evening out the pressure between the two parts of a dual exhaust system. The H-Pipe reduces exhaust sound levels and...
      # 469094
    • Flowmaster®Aluminized Steel S-Bend Pipes
      $156.24from $124.99
      (0)
      Universal Aluminized Steel S-Bend Pipes by Flowmaster®, 6 Pieces. The mandrel formed S-bend pipes are approximately 36” long and simplify the routing and fabrication of custom exhaust systems. They are sold in packs with 6 pipes...
      # 469122
    • Flowmaster®Stainless Steel Mandrel-Bend Pipe
      $49.94from $39.95
      (0)
      Universal Stainless Steel Mandrel-Bend Pipe by Flowmaster®. It is essential that the diameter of an exhaust tube is kept constant through bends, to avoid obstructions to the gas flow. Fitting Flowmaster Mandrel Bends for transition...
      # 4135393
    • Flowmaster®U-Fit Dual Pipe Kit
      $324.99from $259.99
      (1)
      Universal U-Fit Dual Pipe Kit by Flowmaster®, 16 Pieces. These kits come complete with all the pipes you need to build a custom dual exhaust system in 2.25", 2.50" or 3.00" pipe diameters. They include the front adapter pipes,...
      # 469100
    • Flowmaster®Tailpipe Kit
      $112.49from $89.99
      (0)
      Universal Tailpipe Kit by Flowmaster®, 4 Pieces. Flowmaster’s Universal Tailpipe Kits fit 90% of all Trucks, Vans and SUVs. They incorporate 12’ of aluminized mandrel bent tubing with deep slip-fit connections. Aligns for left,...
      # 469136



    Guides & Articles
    Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences...
    It has been a battle of the ages to make exhaust sound like it should. Having less bends or turns will not only improve the sound but also performance. A custom exhaust is always an option for the race inspired and spirited weekend warriors. Our manufactures offer everything needed to build a custom exhaust to your preference.
    Headers are installed because the stock exhaust manifolds usually flow poorly. An exhaust header has individual tubes for each exhaust port, allowing each exhaust pulse to flow unobstructed from the cylinder head. The tubes on headers are usually larger in diameter than the runners on an exhaust manifold and the tubes are mandrel bent for gradual radius bends.
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    2004 Lexus IS Exhausts Reviews
    Average rating:55 - 1 reviews
    5(5)
    APPEARANCE10
    EASE OF INSTALLATION10
    PRICE/VALUE10
    QUALITY10
    2004 Lexus IS
    | Posted by | (Round Rock, TX)

    I was able to install this with little to no experience on exhausts, sounds great, loud but not annoying. Makes you want to go a bit faster at times but with a new exhaust comes better fuel economy.

    Was this review helpful for you? YesNo
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    2004 Lexus IS Models
    • 2004 Lexus IS300 Base Performance Exhaust Systems
    • 2004 Lexus IS300 Sportcross Performance Exhaust Systems