Flowmaster 817390 American Thunder Header Back Exhaust System
by Flowmaster
SKU ds_BDXN_817390
Proudly Canadian
Albertan Owned
Supporting Canadian truckers since 2018
Secure Payments
Financing Available
SSL encrypted checkout with financing options
Trusted Brands
Top-Quality Suppliers
Authorized dealer for Fox, Bilstein, BFGoodrich & 50+ brands
Original price
$1,342.79
-
Original price
$1,342.79
Original price
$1,342.79
$1,342.79
$1,342.79
-
$1,342.79
Current price
$1,342.79
Availability:
Out of stock
Description
For the person who is looking for a complete Header-back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 in. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
Resources
Installation InstructionsSpecifications
| Automotive Item Grade | High Performance |
| California Proposition 65 Chemical Name 1 | Nickel (metallic) |
| California Proposition 65 Chemical Name 2 | Chromium (hexavalent compounds) |
| Description_ASC | Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations |
| Description_ASM | Fits 1968 to 1970 Mopar B-Body with a V8 engine |
| Description_DEF | Exhaust System Kit |
| Description_DES | American Thunder Header Back Exhaust System |
| Description_EXT | American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing/Super 40 Series™ Mufflers/Dual Straight Tailpipes; 409 Stainless Steel; |
| Description_FAB | Dual Out Rear Exit |
| Description_FAB | Dyno Tuned for Maximum Performance |
| Description_FAB | Header Back System |
| Description_FAB | Incl. Hangers and Hardware For Easy Installation |
| Description_FAB | Limited Lifetime Warranty |
| Description_FAB | Mandrel Bent Stainless Steel Tubing |
| Description_FAB | Moderate Exterior Exhaust Tone |
| Description_FAB | Patented Delta Flow Technology |
| Description_FAB | Premium Flowmaster Quality |
| Description_INV | 68-70 MOPAR B-BODY 2.50in. AMT 409S |
| Description_KEY | Mopar; exhaust; b body; performance exhaust |
| Description_LAB | Made In Logo |
| Description_LAB | Proposition 65 |
| Description_MKT | For the person who is looking for a complete Header-back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 in. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. |
| Description_MKT | The American Thunder system is for the person who is looking for a complete crossmember-back dual exhaust system with a deep powerful sound. The system is constructed from 2.50-inch mandrel-bent stainless steel tubing and includes an H-pipe to balance the exhaust pulses and to eliminate back-rap on deceleration. The large cased Super 40 Series performance mufflers generally deliver a moderate interior tone with a deep powerful exterior sound which is suited for enthusiasts who want their performance to be heard. The mandrel-bent tailpipes exit straight out the back under the rear bumper for a strong muscular appearance and allows you to select your own style of tips. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation and is covered by our Lifetime Limited Warranty. . |
| Description_SHO | Exhaust System Kit |
| Exhaust Pipe Wall Max Gauge | 16 |
| Exhaust Series | American Thunder |
| Exhaust Type | Dual |
| Exit Position | Dual Rear |
| Exit Style | Straight |
| Heat Shield Attached | No |
| height | 12.4 |
| Inlet Diameter | 2.500 in. |
| Inlet Inside Diameter | 2.500 in. |
| length | 65.0 |
| LTL | N |
| Material | Stainless Steel |
| Mount Type | Uses New Hangers (Included) |
| Muffler Count | 2 |
| Muffler Series | Super 40 Series |
| Outlet Diameter | 2.500 in. |
| Outlet Outside Diameter | 2.500 in. |
| Single or Dual | Dual |
| Sound Level | Moderate/Aggressive |
| System Type | Header Back |
| Tail Pipe Diameter | 2.500 in. |
| Tip Diameter | 2.500 in. |
| Tip Shape | Round |
| Tip Type | Straight Cut |
| Title | Flowmaster 817390 Header-back System 409S - Dual Rear Exit - American Thunder -Moderate/Aggressive |
| Tubing Diameter | 2.500 in. |
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| weight | 66.9 |
| width | 17.8 |
