1978 Dodge Diplomat Performance Parts

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    • (0 reviews)
      # mpn4494134842
      Dodge Diplomat Coupe / Sedan / Wagon 5.2L / 5.9L 1978, Racing 4-1 304 SS Short Tube Exhaust Headers by Torxe™. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.25". Emissions: Racing Only. Color: Silver. Header Style: Short...
      High quality at an affordable priceExpertly made from premium materials
      $270.00
    • (0 reviews)
      # 594012554
      Dodge Diplomat 1978, Redstuff Ceramic Low Dust Front Brake Pads by EBC®. This set of replacement ceramic brake pads offers OEM quality fit and operation with the superior stopping power, longer life, reduced brake fade, and lower dust...
      $121.13
    • (0 reviews)
      # 584496079
      Dodge Diplomat Coupe / Sedan / Wagon 1978, Monro-Matic Plus™ Front Driver or Passenger Side Shock Absorber by Monroe®. Quantity: 1 per Pack. Nitrogen gas charged Monro-Matic Plus shocks and struts feature VPV (velocity proportional...
      $16.89
    • (0 reviews)
      # 171782861
      Dodge Diplomat 5.2L / 5.9L with Small Block Chrysler Engine 1978, Performer™ Dual Plane Intake Manifold by Edelbrock®. This premium product is the best way to go for those looking for the highest quality replacement that offers...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $310.14 - $627.95
    • (0 reviews)
      # mpn4478773922
      Universal User Configurable LCD Dash Display by Auto Meter®. Designed specifically for the harshest of environments, the carbon composite housing is IP65 sealed against water and dust intrusion and will easily withstand 20g of...
      7.0” TFT LCD panel, 1000 nit brightness for unmatched daytime and nighttime visibility with 800x480 resolution. Onboard photo sensor for automatic brightness controlDimensions - 8.3" Wide x 5.2" High x 1.4" Deep
      $2,832.00
    • (0 reviews)
      # 341248913
      Dodge Diplomat 5.2L / 5.9L With Mopar Small Block LA Engine 1978, Performer RPM Cylinder Head by Edelbrock®. Performer RPM heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants...
      The finest quality at a great priceEdelbrock carry everything needed to complete the job
      $596.95 - $760.50
    • (4 reviews)
      # 102095115
      Dodge Diplomat 1978, Thermocap™ Radiator Cap by Mr. Gasket®. Pressure: 16 lbs. Material: Aluminum. Keeping your engine cool is pretty important, so Mr. Gasket has a full line of cooling system accessories. Whether it’s a simple,...
      Brilliant triple-chrome platingPrevent boilovers
      +1
      $32.43 - $37.53
    • (0 reviews)
      # 77142494
      Dodge Diplomat Standard Transmission 1978, II Series Clutch Pressure Plate by Centerforce®. Disc Outer Diameter: 10.4". Rear Main Seal Style: 2-Piece. 2 Clutch Bolt Pattern. The Centerforce® II Clutch Series utilizes a full facing disc...
      Patented centrifugal weight design (where applicable)Patented ball bearing pressure plate (where applicable)
      $308.95 - $333.95
    • (0 reviews)
      # 191384871
      Dodge Diplomat H / J / L Engine VIN Character 1978, Street Avenger 4BBL Carburetor by Holley®. Street Avenger carburetors are known to bolt on right out of the box and have great features such as a quick change vacuum secondary for easy...
      Vibratory polished for good looksOptimized street calibration that works-out-of-the-box
      $443.95 - $469.95
    • (0 reviews)
      # 803932919
      Dodge Diplomat 1978, PlasmaCore™ Inconel Electrode Pulse Nickel Spark Plugs by Pulstar®. With Resistor. Inconel-electrode Pulse Plug. Designed specifically for most popular vehicles, PlasmaCore™ Inconel Electrode Pulse Plug...
      Increased horsepowerBetter torque
      $14.95 - $119.60
    • (0 reviews)
      # 954505052
      Dodge Diplomat 1978, Front Bent Tie Rod End by Proforged®. Quantity: 1 per Pack. Proforged applied the same technological advancements in ball joint construction to their line of Tie Rod Ends and Rack Ends, delivering a premium product...
      SAE1045 forged steeling housingsBall studs forged from ultra-strong SAE4140 chromoly steel
      $17.96 - $39.57
    • (0 reviews)
      # 714498802
      Dodge Diplomat 1978, Alternator by Tuff Stuff Performance®.
      Heavy Duty Copper Wound CoilsSpike Resistant Diodes
      $166.06 - $335.66
    • (0 reviews)
      # 503630084
      Dodge Diplomat 1978, Ring and Pinion Gear Set by Motive Gear®. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer ring and pinions for easy setup, superior strength, quality,...
      Quiet operationComputer controlled heat treatment
      $243.55 - $301.70
    • (0 reviews)
      # 48222560
      Club X-1 Full Face ATM (Advance Thermo Material) Racing Helmet by Sparco®. Certification: ECE 05; Material: ATM (Advance Thermo Material) Designed for indoor kart racing where a fire proof helmet isn't required, this product is...
      Designed for indoor kart racingProvides ultimate protection
      $140.00
    • (0 reviews)
      # 450479564
      Universal PowerPack™ Turbocharger System by Banks®. The Banks Power Dual Exhaust PowerPack System is the complete towing package your pickup truck, with extended cab short bed configuration, deserves.
      Stunning Top GainsImproved Mileage
      $2,198.00 - $2,798.00
    • (0 reviews)
      # 231059638
      Dodge Diplomat 5.2L / 5.9L with Small Block Chrysler Engine 1978, Steel Short Tube Tight Tuck Street Rod Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Emissions: Racing Only....
      $273.82 - $389.91
    • (0 reviews)
      # 49738674
      Dodge Diplomat 1978, Street Performance Drilled and Slotted Rotor Forged Dynalite Caliper Front Brake Kit by Wilwood®. The rotors are black coated. The image displays the brake rotors after bedding in. This Brake kit will fit the Flex...
      $877.49
    • (0 reviews)
      # 900832723
      Dodge Diplomat Coupe / Sedan / Wagon 1978, Front Screw-In Ball Joint by QA1®. Quantity: 1 per Pack. For a variety of racing applications, QA1's Screw-In Style Ultimate Ball Joint is a great choice. This patented, self-lubricating design...
      Ultimate Low Friction OperationWear Resistant Design
      $55.68 - $60.58
    • (0 reviews)
      # 377185812
      Dodge Diplomat 1978, E Series Round Red Air Filter by K&N®. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N makes over 1,200 different replacement air filters...
      Designed to boost horsepower and rate of accelerationCan be cleaned and used again
      $55.99 - $57.99
    • (0 reviews)
      # 379675232
      Universal 4-Bank Chip Burner by SCT Performance®. SCT's single program and 5 program, four bank custom chips are specifically tuned for your car or truck by one of SCT's Custom Tuning dealers world wide.
      Easily switch between custom tunes using the optional Dial SelectorCan be custom tuned by one of SCT's Custom Tuning dealers world wide
      $349.00
    • (0 reviews)
      # 556725138
      Dodge Diplomat 5.2L / 5.9L With Mopar Small Block LA Engine 1978, Victor Series Satin Cylinder Head by Edelbrock®. These cylinder heads are an in-line valve design incorporating a 16° valve angle (stock is 18°) for improved air flow...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1,418.95 - $1,728.65
    • (0 reviews)
      # 235082644
      Dodge Diplomat 5.2L / 5.9L with Mopar Small Block LA Engine 1978, 100 Series Electric Water Pump by Meziere Enterprises®. Flow Rate: 35 GPM. Performance, sophistication and durability are by no means all the benefits you'll get if you...
      Suitable for street or drag strip use – 2400+ hour life expectancyHeavy duty motor provides 42 gallons per minute free flow rating
      +2
      $407.15 - $532.43
    • (0 reviews)
      # 77142483
      Dodge Diplomat Standard Transmission 1978, I and II Series Clutch Disc by Centerforce®. Disc Outer Diameter: 10.4". Centerforce brings together high-quality friction materials and patented processes to give you top-of-the-line discs....
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $120.95 - $137.95
    • (0 reviews)
      # 403948116
      Dodge Diplomat Mopar Small Block LA Gasoline 1978, Performer RPM Street Mechanical Fuel Pump by Edelbrock®. Original Equipment proved, patented in-house design technology, from a certified manufacture guarantee exacting fit, form &...
      The finest quality at a great priceWe carry everything needed to complete the job
      $158.75
    • (0 reviews)
      # 819647172
      Dodge Diplomat 1978 MPG+™ Spark Plug Wires by Granatelli Motor Sports®. Granatelli O ohm wires are patent protected by United States Patent number 7,185,622. This patent covers our unique method of producing ignition wires of...
      Increases mileage 15%Direct OEM replacement, exceeds OEM specifications, OBD-II computer safe
      $110.20 - $129.20
    • (0 reviews)
      # mpn3800683656
      Dodge Diplomat 1978, Front Idler Arm by Proforged®. Quantity: 1 per Pack. Proforged® Idler Arms are built to strict tolerances using the latest innovations in steering technology, ensuring crisp, predictable handling. Laboratory tested...
      SAE1045 forged steeling housingsBall studs forged from ultra-strong SAE4140 chromoly steel
      $31.79
    • (0 reviews)
      # 714493334
      Dodge Diplomat 1978, One Wire Alternator by Tuff Stuff Performance®. 1 Wire.
      Heavy Duty Copper Wound CoilsSpike Resistant Diodes
      $228.37 - $279.25
    • (0 reviews)
      # 503521353
      Dodge Diplomat 1978, Rear Standard Open Carrier Case by Yukon Gear & Axle®. Without Spider Gears. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $155.24 - $408.30
    • (0 reviews)
      # 69025922
      110 Series Single Layer Racing Suit by RaceQuip®. Avaliable in Colors: Black, Blue, Red. Get superior durability and comfort combined with overall flame and heat protection. Strong construction and advanced sewing techniques make this...
      Ensures heat and fire protectionGentle fabric provides superior comfort
      $99.95 - $139.95
    • (0 reviews)
      # mpn1073832
      Dodge Diplomat with PRE-OBDII Models 1978, Pre-OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port....
      $205.77




    CARiD is the ultimate source for premium-quality performance parts. With our extensive collection of performance upgrades, adding onto your vehicle's performance or improving its look is safe and easy. Boost the interior of your 1978 Dodge Diplomat with a set of racing seats, raise or lower your vehicle for an aggressive look, or add a set of high-performance brake rotors for superior braking. Unlock the hidden potential of your 1978 Dodge Diplomat that has been waiting to be released!

    Guides & Articles

    Useful articles fast to read and guides easy to understand written by mechanics and car enthusiasts to turn your shopping experience with CARiD into a pleasure

    • Performance Brakes, Pads & Rotors
      August 10, 2018
      When Is It Time To Replace My Brake Lines?
      Hydraulic brake lines and hoses aren’t something most people think about when it comes to vehicle maintenance. That’s understandable, considering automakers...
      by Michael Grayen
    • Performance Brakes, Pads & Rotors
      August 09, 2018
      When Is It Time To Replace My Brake Calipers?
      Brake calipers, found only on disc brake systems, house pistons which use the force of hydraulic brake fluid to stop the vehicle. More specifically, those pistons...
      by Timothy Zahl
    • Suspension
      August 08, 2018
      When Is It Time To Replace My Vehicle's Springs?
      The springs on your vehicle are an integral part of its suspension system. Not only do springs keep all four corners suspended at a pre-determined, level ride height,...
      by Richard Reina
    • Suspension
      July 11, 2018
      When Is It Time To Replace My Suspension Bushings?
      Maybe you remember being pushed along in a wheelbarrow during childhood. The ride was bone-jarring - even with an air-filled rubber tire cushioning against the rough...
      by Timothy Zahl
    • Engines
      May 21, 2018
      How To Remove An Engine
      If you've grown tired of your engine's declining performance, inconsistent power, rough idle, exhaust smoke, knocking noises, rattles, and other maladies that plague...
      by Richard Reina
    • Engines
      May 09, 2018
      How Does An Internal Combustion Engine Work?
      An engine that uses liquid fuel to create energy, such as an internal combustion engine, is basically a large air pump. Cool air is drawn in, mixed with the fuel of...
      by Timothy Zahl
    • Engines
      May 02, 2018
      Glossary Of Engine External Parts
      Internal combustion engines are extremely complex and feature a wide array of components that rotate, pump, pressurize, or seal. Many of these components, while...
      by Timothy Zahl
    • Performance Engine Parts
      April 20, 2018
      What You Need When Rebuilding Or Replacing An...
      So you’ve decided to take on the project of rebuilding or replacing your vehicle’s engine. Modern internal combustion engines are quite complex – with a wide...
      by Richard Reina
    • Shift Knobs
      January 19, 2018
      Shopping Guide – Shift Knobs
      The knob at the end of your gearshift lever probably isn't something that most people notice when getting into your car or truck. But for a minimal cost, it can be. We...
      by Timothy Zahl
    • Running Boards
      November 29, 2017
      Shopping Guide - Running Boards
      Running boards date as far back as the automobile itself, being integrated into car and truck designs until falling out of favor after World War II. With the boom in...
      by Timothy Zahl
    • Off-Road Bumpers
      November 28, 2017
      Shopping Guide – Off Road Bumpers | Custom...
      There's a saying that advises out of all the paths you take in life, it's important to make sure a few of them are dirt. But while dirt can be found most anywhere you...
      by Timothy Zahl
    • Automotive Tools
      August 30, 2017
      What Special Tools Are Available For Exhaust...
      Exhaust work can be challenging. Old parts are usually corroded and difficult to separate, and new ones sometimes need minor fitment adjustments during installation....
      by Timothy Zahl

    Popular Products



    1978 Dodge Diplomat Performance Parts Reviews

    Average rating:  3.5  3.5 - 3 reviews
    2.8 of 5
    If You Have to
    My '92 SC400 was leaking cooling fan oil. It never completely shit out, but I thought, "Why not?" So I paid like $500 for this electric fan that while is lighter, does not keep the motor any cooler. I haven't noticed any kind of gas mileage increase (still at 23 on the highway and like 17 in town) or any kind of power increase (although it must be said I didn't expect much, but the forums gave me a bit of hope). I suppose this conversion is fine, but if my OE fan wasn't dying, I wouldn't have bothered. $500 is $500, man.
    Posted by Tom Fletcher (Stillwater, OK) / July 10, 20181992 Lexus SC
    Was this review helpful for you? Yes
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