Flowmaster® - 40 Series Delta Flow™ Muffler

1981 Chevy Camaro
Flowmaster® - 40 Series Delta Flow™ MufflerFlowmaster® - 40 Series Delta Flow™ MufflerFlowmaster® - 40 Series Delta Flow™ MufflerFlowmaster® - 40 Series Delta Flow™ Muffler - 3D ViewFlowmaster® - Offset Inlet / Offset Outlet MufflerFlowmaster® - 40 Series Delta Flow™ Muffler Aggressive SoundFlowmaster® - 40 Series Delta Flow™ Muffler Sound Test 602x420Flowmaster Authorized Dealer
Availability: In Stock (51)
Usually ships within 24 to 48 hours
1981 Chevy Camaro
Fits Following Model(s):
  • Z28
Have a Question? 888.634.9437
Ask a Specialist Live Chat
Lowest Prices
Price match guarantee
Easy Returns
Quick & Hassle Free
In-House Experts
We know our products
Guaranteed Fitment
Always the correct part
Originally $118.05
Add To Cart
Product Details

Chevy Camaro Z28 1981, 40 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2" Offset Inlet / 2" Offset Outlet, 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 Technology, has enabled the company to create a performance muffler with an aggressive exterior sound combined with a subdued (but noticeable) interior resonance. This is a muffler that makes a true performance statement without being overly tiring for the driver.

Flowmaster Muffler Family Flowmaster Flowmaster


  • The Quietest Option in the 40 Series Two Chamber Line
  • Less Resonance than other 40 Series Mufflers
  • Advanced Two-Chamber Design Incorporating Patented Delta Flow Technology
  • Available in 409S Stainless Steel or Aluminized Mild Steel
  • Available with either Single or Dual Outlets
  • 3-Year Warranty for Aluminized Mild Steel
  • Limited Lifetime Warranty on Stainless Steel Mufflers
Flowmaster - Delta Flow Technology

Like all Flowmaster mufflers, the 40 Series Delta Flow mufflers improve exhaust scavenging for increased torque and horsepower. The precision positioned Delta deflectors have a dual function, as they are positioned to create a low pressure zone that improves exhaust scavenging, while also reducing the interior resonance. The unique design of the 40 Series two chamber delta flow mufflers makes them perfect for performance cars used daily or on long drives. The exterior sound will turn heads, while the interior sound level provides the driver with the beautiful music of a performance engine at a comfortable sound level. The mufflers are fully MIG welded for maximum durability and you have a choice between aluminized mild steel and stainless steel construction.

Flowmaster mufflers differ in technology and tuning, and thus in tone and character, to give your performance engine a sound to your personal liking.

All Flowmaster mufflers are tuned for maximum performance. All Flowmaster mufflers produce a beautiful deep performance tone. Choosing the right Flowmaster muffler is not a technical decision – it is all up to your personal taste. It’s A Sound Decision®.

Flowmaster mufflers employ two unique technologies developed by the company; the patented Delta Flow and the Laminar Flow. They give different characters of sound and can be tuned to achieve the desired exhaust note. Flowmaster Exhaust System Technology is so versatile, and gives such a high degree of control, that it is used both by racers, who want maximum power, and by the U.S. Air Force in Stealth applications where maximum silence and minimum heat emissions are prime considerations. Be it for a domestic or import truck, SUV, off-road warrior, daily driver, muscle car, euro-spec cruiser or sport compact vehicle Flowmaster always has the right muffler for you.

Brand: Flowmaster       Part Number: 942043       UPC: 700042015429 This part is compatible with 141 vehicle(s)
paypal credit flowmaster exhaust system

Flowmaster® has its roots in solving the engine noise problems encountered by California racers in the 1980s. In 1983 Flowmaster’s founder, Ray Flugger, created his first patented design of racing silencers, which dampened noise with minimal loss of power. Ray attached handles to ease carrying the square shaped race mufflers through the race pits, and the mufflers became known as the "suitcase mufflers." Today, the innovative Flowmaster mufflers are the result of years of development with top race engine builders, thousands of hours of dyno research and "real-world" on-track testing.

Product Reviews (1)

Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Flowmaster® - 40 Series Delta Flow™ Muffler
Flowmaster® - 40 Series Delta Flow™ Muffler
Average Rating:  5  5 of 5
1967 Oldsmobile Cutlass | Posted by | (Woodland Hills, CA)

These mufflers from Flowmaster are the quality I expected for my muscle car projects. They sound great and add performance to my rides.

2 people found this review helpful.
Was this review helpful for you? YesNo
Share this review:
All Flowmaster Reviews
Product Reviews (1)
Product Reviews (1)
Show Next 10 All Flowmaster Reviews
More Accessories