Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededFLOWMASTERPART NUMBER: 389-42582
80 Series Cross-Flow Muffler Dual In/Dual Out: 2.5"
$12495
5 left in stock
Ships on Nov 02, 2026
Lowest Price GuaranteeDual In/Dual Out
- 80 Series Cross-Flow Muffler
- Dual In/Dual Out: 2.5"
- Aluminized Steel
Fits 1962-1974 Camaro/Firebird, Chevy II/Nova - Case: 18" L (4" Thick)
- Overall: 24" L x 9.75" W
True Dual Performance
Flowmaster's 80 Series Cross-Flow Mufflers offer true dual performance where only a single exhaust system will fit, commonly found on classic Camaros and Firebirds. The 80 Series Cross-Flow Muffler fits transversely behind the rear axle and in front of the fuel tank making it the perfect OE replacement. The 80 Series gives excellent ground clearance, aggressive tone and increased power output over stock.
Show More
Features:
- True dual performance
- Aggressive tone
- Stainless steel or aluminized steel
- Fully MIG-welded
- Single or dual outlets
- Perfect replacement for Camaro/Firebird configuration
Part TypeMuffler
Product LineFlowmaster 80 Series Cross-Flow Mufflers
BrandFLOWMASTER
Package Height4.7
Package Width10.2
Package Length25.0
Weight16.02 PG
Part CategoryPerformance Parts
ShapeOval
Exhaust Tip Quantity0
Outlet Quantity2
Inlet LocationDual
Muffler TypeChambered (Transverse)
Inlet PositionFront
Inlet TypeWeld-On
Inlet Size (In.)2.5
Heat Shield AttachedNo
Outlet StyleStandard, without tip
Muffler FinishAluminized
Mount TypeUses New Hangers (Not Included)
Body Length18 in.
Muffler Count1
Inlet Outside Diameter2.63 in.
Inlet Diameter2.50 in.
Clamps IncludedNo
Inlet Quantity2
Sound LevelAggressive
FinishHigh-Temperature Paint
Outlet Outside Diameter2.63 in.
Muffler MaterialSteel
ReversibleNo
Universal Or Specific FitUniversal
Outlet Size2.5 in (63.5 mm)
Hanger IncludedNo
Inlet Connection TypePipe Connection
Outlet Diameter2.5 in (63.5 mm)
ColorBlack
Muffler Series80 Series Crossflow
TunableNo
QuantitySold individually
Overall Length24 in.
MaterialAluminized Steel
Case Length18 in (457.2 mm)
Internal ConstructionChambered
Case ShapeOval
Body Width9.75 in.
Outlet Inside Diameter2.50 in.
Body MaterialAluminized Steel
Inlet Inside Diameter2.50 in.
Outlet LocationDual
FitmentUniversal
Body Height4 in.
Outlet TypeDual
Part FitmentUniversal
Outlet PositionOffset
Vendor Part Number42582
Package Qty1
Package TypeEA
No Questions
No Reviews
ITEM YOU MAY ALSO CONSIDER
![Oval Straight-Through Performance Exhaust Muffler [Satin]](https://www.jegs.com/images/mini_200/600/642/642-12468.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
