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17104 - Header-back System - Dual Rear Exit - American Thunder - Moderate Sound - default Image
17104 - Header-back System - Dual Rear Exit - American Thunder - Moderate Sound - additional Image
17104 - Header-back System - Dual Rear Exit - American Thunder - Moderate Sound - additional Image
1967-74 Camaro, Firebird, 1968-74 Nova - American Thunder Exhaust System 17104, 817104YouTube Button

Header-back System - Dual Rear Exit - American Thunder - Moderate Sound

American Thunder Kit

PART# 17104

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Fits 1967 to 1974 Chevrolet Camaro and Pontiac Firebird, also 1968 to 1974 Chevrolet Nova, with V8 engines, does not fit convertibles without an X-brace modification, call Tech Support Line for assistance.

Overview

Flowmaster is proud to introduce our American Thunder dual exhaust system for 1967–'74 Camaro/Firebird and 1968–'74 Nova. The system features our 80 Series Crossflow muffler, all mandrel-bent dual 2.50-inch head pipes including an H-pipe crossover, and dual 2.50-inch tailpipes for a deep rich sound and optimum performance. This header-back aluminized steel exhaust system gives these classic muscle cars a moderate tone inside and out. Using the crossflow design, this exhaust places the muffler in the factory location behind the rear axle retaining full ground clearance under the car while offering all the performance benefits of a full dual exhaust system. The system includes all parts, hardware and illustrated instructions, and includes a 3-Year Warranty.

Features:

  • Includes Hangers and Hardware for Easy Installation
  • Moderate Exterior Exhaust Tone
  • Mandrel bent Aluminized Tubing
  • Includes an H-Pipe Crossover
  • Maximum Ground Clearance
  • Header-back System

Specs

2WD/4WD2WD
BrandFlowmaster
California Proposition 65 RequiredNo
Emission Code3
Exhaust SeriesAmerican Thunder
Exit PositionDual Rear Exit
Heat ShieldNo
Inlet Diameter (in)2.5
MaterialAluminized Steel
Muffler Part Number42585
Muffler Quantity1
Muffler Series80 Series Crossflow
Outlet Diameter (in)2.5
Product TypeExhaust Systems / Kits
Single DualDual
Sound LevelModerate Sound
System TypeHeader-back System
Tip QuantityNot Included
Tubing Diameter (in)2.5
Part Number17104

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Tech Resources

Fits 1967 to 1974 Chevrolet Camaro and Pontiac Firebird, also 1968 to 1974 Chevrolet Nova, with V8 engines, does not fit convertibles without an X-brace modification, call Tech Support Line for assistance.

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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

      Some parts are not legal for use in California or other states with similar regulations.