Flowmaster® is proud to introduce our American Thunder® dual exhaust system for 1967-1974 Chevrolet Camaro, Pontiac Firebird and 1968-1974 Chevrolet Nova's. This all stainless steel exhaust system features our exclusive design 80 Series™ Crossflow muffler, all mandrel-bent dual 2.50-inch pipes including an H-pipe crossover for a deep smooth tone that also minimizes any back-rap on deceleration. The dual 2.50-inch stainless steel tailpipes provide a deep rich sound and optimum performance. This crossmember-back 409S stainless 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 like all Flowmaster stainless steel street products, it includes our Limited Lifetime Warranty.
Specifications:
| Description_ASC |
Convertible models require 3/8-inch of shims on the factory X-brace for clearance of the exhaust tubing. |
| Description_DEF |
Exhaust System Kit |
| Description_EXT |
American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series (TM) Crossflow Muffler; |
| Description_DES |
Flowmaster American Thunder Crossmember-Back Exhaust System |
| Description_MKT |
Flowmaster® is proud to introduce our American Thunder® dual exhaust system for 1967-1974 Chevrolet Camaro, Pontiac Firebird and 1968-1974 Chevrolet Nova's. This all stainless steel exhaust system features our exclusive design 80 Series™ Crossflow muffler, all mandrel-bent dual 2.50-inch pipes including an H-pipe crossover for a deep smooth tone that also minimizes any back-rap on deceleration. The dual 2.50-inch stainless steel tailpipes provide a deep rich sound and optimum performance. This crossmember-back 409S stainless 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 like all Flowmaster stainless steel street products, it includes our Limited Lifetime Warranty. |
| Description_INV |
67-74 CAMARO/NOVA 2.5" AMT 409S |
| Description_FAB |
H-pipe Crossover for Maximum Power and Deep Tone |
| Description_FAB |
Includes Hangers and Hardware for Easy Installation |
| Description_FAB |
80 Series Cross-flow Performance Muffler |
| Description_FAB |
Mandrel-bent Stainless Steel Tubing |
| Description_FAB |
Moderate Exterior Exhaust Tone |
| Description_FAB |
Maximum Ground Clearance |
| Description_FAB |
Stainless Steel Construction |
| Description_FAB |
Lifetime Limited Warranty |
| Description_FAB |
Crossmember-back System |
| Description_SHO |
Exhaust System Kit |
| WARNING CA Proposition 65 |
Yes |
| Inlet Diameter (in) |
2.5 |
| Tube Diameter |
2.5 inch |
| Outlet Diameter |
2.500 in. |
| Title |
Flowmaster 817104 Header-back System 409S - Dual Rear Exit - American Thunder - Moderate Sound |
| Material |
409 Stainless Steel |
| Heat Shield Attached |
No |
| Exhaust Series |
American Thunder |
| Inlet Diameter |
2.500 in. |
| California Proposition 65 Chemical Name |
Chromium (hexavalent compounds), Nickel (Metallic) |
| California Proposition 65 Required |
Yes |
| Product Type |
Exhaust System |
| WARNING CA Proposition 65 Message |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Sound Level |
Moderate |
| California Proposition 65 Chemical Name 1 |
Nickel (metallic) |
| Inlet Inside Diameter |
2.500 in. |
| Exit Style |
Straight |
| Heat Shield |
No |
| Outlet Diameter (in) |
2.5 |
| Single Dual |
Dual |
| System Type |
Crossmember-back |
| Type of Exhaust |
Crossmember-back |
| Warning |
California Proposition 65 |
| Muffler Series |
80 Series Crossflow |
| Exhaust Type |
Dual |
| California Proposition 65 Chemical Name 2 |
Chromium (hexavalent compounds) |
| Muffler Part Number |
Kit Only |
| Muffler Count |
1 |
| Outlet Outside Diameter |
2.500 in. |
| Tubing Diameter |
2.500 in. |
| Tail Pipe Diameter |
2.500 in. |
| Tip Diameter |
N/A |
| Single or Dual |
Dual |
| 2WD/4WD |
2WD |
| Brand |
Flowmaster |
| Emission Code |
5 |
| Exit Position |
Dual Out Rear |
| Muffler Quantity |
1 |
| Tip Quantity |
Not Included |
| Tubing Diameter (in) |
2.5 |
| Length |
14.0000 |
| Width |
29.0000 |
| Height |
48.0000 |
| Weight |
60.0000 |
