American Thunder Header-Back Exhaust System 1967-1974 GM Camaro/Firebird V8

Vehicle Info Needed

FLOWMASTERPART NUMBER: 389-817104

American Thunder Header-Back Exhaust System 1967-1974 GM Camaro/Firebird V8

Name: American Thunder Header-Back Exhaust System 1967-1974 GM Camaro/Firebird V8
Brand: FLOWMASTER
SKU: 389-817104
Price: 1249.95 USD
Availability: InStock

^$1,249⁹⁵

Ships on 10/20/2026

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GM Camaro/Firebird V8

1967-1974 GM Camaro/Firebird V8
1968-1974 Chevy Nova V8
2.5" Tubing
Tips Not Included
Dual Rear Exit
80 Series Crossflow Muffler
409S Stainless Steel

Experience An Exhaust System Tuned for Performance and Tone

If you need an exhaust system that has been dyno tuned to produce maximum performance, look no further than Flowmaster's American Thunder Exhaust Systems. This line, designed for passenger cars, produces a range of systems that offer moderate to aggressive exhaust notes. Available in axle, cat, and header-back configurations, Flowmaster has you covered. To ensure durability and ease of installation, these kits are made from 16-gauge mandrel bent tubing and includes the necessary hangers and hardware.

Part TypeExhaust System

Product LineFlowmaster American Thunder Exhaust Systems for Cars

BrandFLOWMASTER

Package Height10.0

Package Width28.0

Package Length47.0

Weight76.7 PG

Tailpipe Diameter (In.)2.5

Muffler Inlet Inside Diameter2.50 in.

Hangers IncludedYes

Main Piping Diameter2.50 in.

Tail Pipe QuantityDual

Inlet TypeWeld-On

Catalytic Converter Quantity0

Exit LocationSplit Rear

Inlet QuantityTwo

Muffler Body Length22.25 in.

Sound LevelModerate

Muffler MaterialStainless steel

Muffler Body Material409 Stainless Steel

Gasket Or Seal IncludedNo

Pipe ColorBlack

System FinishNatural

Muffler Quantity1

Muffler Inlet Outside Diameter2.63 in.

Exit QuantityTwo

Muffler Flanged OutletNo

Tip QuantityNone

Exhaust TypeDual

Catalytic Converter IncludedNo

Heat Shield IncludedNo

Part CategoryPerformance Parts

Hardware IncludedYes

Exhaust Tip Quantity0

Valve IncludedNo

Muffler TypeChambered

Pipe Material409 Stainless Steel

Muffler Body Width9.50 in.

Tail Pipe Tapered OutletNo

Muffler Body ShapeOval

Mounting Bracket IncludedYes

Muffler Outlet Quantity1

Muffler FinishBlack High-Temperature Paint Finish

Inlet Diameter2.50 in.

Clamps IncludedYes

Muffler StyleChambered

FinishNatural

Exit StyleDual Out Rear

Muffler Body Height4 in.

Tip IncludedNo

Clamping TypeFlat Band

Muffler Flanged InletNo

Spring Bolt Kit IncludedNo

Muffler Series80 Series Crossflow

QuantitySold as a kit

Muffler IncludedYes

System StyleHeader-back

Tail Pipe Outlet Outside Diameter2.50 in.

Muffler ConfigurationDual inlet/Dual outlet

System MaterialStainless steel

Valve TypeNot Applicable

Intermediate Pipe Diameter2.5 in (63.5 mm)

Part FitmentSemi Universal

Vendor Part Number817104

Package Qty1

Package TypeEA

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