Q40 MotorsportsEnter Garage
Log inMEMBER PRICING

Find parts for your vehicle

Start with what you know.All parts
Saved vehicles
Vehicle details

No additional reviewed details

Ready to see available parts

No additional reviewed details are available for this selection. Add make, model or year to refine the results. Check each product’s application before ordering.

Choose make

Choices use the other selected filters. You can also enter a value directly.

Home / Exhaust / Muffler / Flowmaster 2.5in.IN(D)/OUT(D) 80 Series Muffler
Flowmaster 2.5in.IN(D)/OUT(D) 80 Series Muffler
Image availability does not confirm fitment or availability.
Flowmaster

Flowmaster 2.5in.IN(D)/OUT(D) 80 Series Muffler

PART 42582CATEGORY Muffler
$249.95
MSRP $281.95You save $32.00
$249.95
1

Product information

Manufacturer information. Check the part number and installation requirements for your vehicle.

Supplier details checked 2026-09-23 · Test catalog

Some supplier details are unavailable for this product.

Product description

80 Series Crossflow - 2.50 Dual In / 2.50 Dual Out - Aggressive Sound

Flowmaster 80 Series Chambered Muffler

Features

Aggressive Sound Exterior Exhaust Tone

The original two chamber design

Noticeable interior resonance

Cross Flow Applications

Manufacturer notes

Fits 1967 to 1974 Chevrolet Camaro and Pontiac Firebird.

Supplier category
Exhaust, Mufflers & Tips
Supplier subcategory
Muffler
UPC / barcode
700042014750
Units per product
1
Supplier Proposition 65 status
Y
Supplier EPA status
N/A
Air freight prohibited
No
Not CARB approved
No
CARB acknowledgement required
No
Freight delivery required
No
Powersports product
No

Manuals and documents

More manufacturer information

Other product descriptions

Flowmaster 2.5in.IN(D)/OUT(D) 80 Series Muffler

25INDOUTD 80 SERIES

FM80SRS DUAL/D 2.5

About the manufacturer

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

Additional manufacturer information

MUFF 2.50IN

Explore the 3D garage

Chevrolet Corvette C8 · Subaru WRX VA · Mazda Miata NA · Ford Mustang S197 · BMW 3 Series E46 · Honda S2000 AP1 · BMW M3 E30 · Honda Civic 11th generation · Audi S4 B5 · Ford Mustang S550 · BMW M3 E46 · Chevrolet Corvette C6 · Chevrolet Camaro 5th generation · BMW M3 E36 · Chevrolet Corvette C7 · Integra 3rd gen · Integra 2nd gen · Illustrative previews

Enter Garage
Flowmaster 2.5in.IN(D)/OUT(D) 80 Series Muffler | Q40 Motorsports