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Massive Discount Flowmaster 842583 80 Series™ Cross-flow Muffler Limited Time 95% Off [qUw9KX36]

$36.99 $118.99 -69%

The 80 series is a cross-flow design for applications where the muffler is mounted transversely behind the rear end. Delivering an aggressive muscle car sound both inside and outside the vehicle, this is an excellent replacement for Camaros and Fireb

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The 80 series is a cross-flow design for applications where the muffler is mounted transversely behind the rear end. Delivering an aggressive muscle car sound both inside and outside the vehicle, this is an excellent replacement for Camaros and Firebirds with transverse mufflers. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

Installation Instructions



Specifications:

Automotive Item Grade High Performance
Body Height 4.000 in.
Body Length 15.000 in.
Body Width 9.750 in.
California Proposition 65 Chemical Name 1 Nickel (metallic)
California Proposition 65 Chemical Name 2 Chromium (hexavalent compounds)
Color Black
Description_ASC Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Description_ASM Universal Muffler - Not a direct fit. Some adaptation required.
Description_DEF Exhaust Muffler
Description_DES 80 Series™ Cross-Flow Muffler
Description_EXT 80 Series™ Cross-Flow Muffler; 2.5 in. Offset Inlet/Dual Outlet; Case Dimensions 4 in. x 9.5 in. x 15 in.; 21 in. Overall Length; 409 Stainless Steel;
Description_FAB 1984 to 2002 Camaro/Firebird/Buick Grand National
Description_FAB Aggressive And Powerful Exterior Exhaust Tone
Description_FAB Cross Flow Applications
Description_FAB Durable Fully Welded 16ga Aluminized Steel
Description_FAB Limited Lifetime Warranty
Description_FAB Notable Interior Resonance
Description_FAB Premium Flowmaster Quality
Description_FAB The Original Two Chamber Design
Description_INV 2.5IN(O)/DUAL OUT 80 SERIES 409S
Description_INV Stainless Mufflers
Description_KEY Chambered; Exhaust; Performance muffler; muffler; flowmaster; race muffler; universal muffler; magnaflow; borla; gibson; stainless exhaust; stainless muffler; tuned muffler; sport muffler; tuner; tuned exhaust; exhaust upgrade; performance upgrade
Description_MKT The 80 series is a cross-flow design for applications where the muffler is mounted transversely behind the rear end. Delivering an aggressive muscle car sound both inside and outside the vehicle, this is an excellent replacement for Camaros and Firebirds with transverse mufflers. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
Description_SHO Muffler
Fitment Universal
height 4.5
Inlet Connection Type Pipe
Inlet Diameter 2.500 in.
Inlet Inside Diameter 2.500 in.
Inlet Outside Diameter 2.500 in.
Inlet Position Offset
Inlet Type Single Offset
length 25.0
LTL N
Main Piping Diameter 2.500 in.
Material Stainless Steel
Mount Type Uses Factory Hangers
Muffler Series 80 Series Crossflow
Muffler Type Reflection
Outlet Connection Type Pipe
Outlet Diameter 2.500 in.
Outlet Outside Diameter 2.500 in.
Outlet Position Dual
Outlet Type Dual Outlet
Overall Length 21.000 in.
Shape Oval
Sound Level Aggressive
Tip Quantity 0
Title Flowmaster 842583 80 Series Muffler 409S - 2.50 Offset In / 2.50 Dual Out - Aggressive Sound
WARNING CA Proposition 65 Yes
WARNING CA Proposition 65 Message WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
weight 11.5
width 9.75

What Our Customers Say

January 8, 2026

Absolutely no complaints!

A great item. No complaints.

- Robyn V..

January 8, 2026

Absolutely no complaints!

An amazing item for what it costs.

- Andrew O..

January 8, 2026

Absolutely no complaints!

This is a brilliant and fine piece of work.

- Rachel J..

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