Description_ASC |
Fits 1967-1970 Ford Mustang with V8 engine and exits through rear valance exhaust cutouts. Does not fit convertibles or staggered shock models. |
Description_DEF |
Exhaust System Kit |
Description_DES |
Flowmaster American Thunder Crossmember-Back Exhaust System |
Description_EXT |
American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing/H-Pipe/Hardware/Super 44 Series (TM) Mufflers/3.0 in. Stainless Steel Tips; |
Description_INV |
67-70 MUSTANG AMT THRU VALANCE 409S |
Description_SHO |
Exhaust System Kit |
Description_MKT |
For the person who is looking for a true dual crossmember-back exhaust system with an moderate to aggressive exhaust tone. With an easy fit in mind, these systems are constructed from 16-gauge mandrel-bent stainless steel tubing with a built-in H-pipe crossover, a pair of specially selected Super 44 Series mufflers and includes all hangers and hardware necessary for installation. This system fits through the factory rear valance exhaust cutouts and includes a pair of 3.00-inch polished stainless steel tips. The American Thunder systems deliver a moderate to aggressive interior and exterior tone and are best suited to the enthusiast who wants their performance to be heard. Like all Flowmaster exhaust systems, the benefits include improved throttle response, power and mileage. If you prefer aluminized steel construction, check out optional system# 17281. Notes: Does Not fit convertibles or cars with staggered shocks. Does Not include header reducer cones or downpipes for factory manifolds. |
Description_FAB |
Super 44 Series Performance Mufflers for Deep Powerful Sound |
Description_FAB |
Includes Hangers and Hardware for Installation |
Description_FAB |
Mandrel-bent 16-gauge Stainless Steel Tubing |
Description_FAB |
Aggressive to Moderate Exterior Exhaust Tone |
Description_FAB |
3.00-inch Polished 304 Stainless Steel Tips |
Description_FAB |
Crossmember-back True Dual Exhaust System |
Description_FAB |
H-pipe Crossover for Maximum Power |
Description_FAB |
Does Not Include Header Reducers or Downpipes for Factory Manifolds |
Description_FAB |
Lifetime Limited Warranty |
Outlet Diameter |
2.500 in. |
California Proposition 65 Chemical Name |
Chromium (hexavalent compounds), Nickel (Metallic) |
Exhaust Series |
American Thunder |
Material |
409 Stainless Steel |
WARNING CA Proposition 65 |
Yes |
California Proposition 65 Chemical Name 2 |
Chromium (hexavalent compounds) |
Title |
Flowmaster 817281 Header-back System 409S - Dual Rear Exit - American Thunder - Aggressive Sound |
California Proposition 65 Required |
Yes |
Inlet Diameter (in) |
2.5 |
Product Type |
Exhaust System |
Sale Category |
Exhaust |
Single Dual |
Dual |
Sound Level |
Aggressive / Moderate |
Tubing Diameter (in) |
2.5 |
Warning |
California Proposition 65 |
WARNING CA Proposition 65 Message |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
Tail Pipe Diameter |
2.500 in. |
California Proposition 65 Chemical Name 1 |
Nickel (metallic) |
Tip Quantity |
2 |
Heat Shield Attached |
No |
Inlet Inside Diameter |
2.500 in. |
Exit Style |
Straight |
Outlet Diameter (in) |
2.5 |
System Type |
Crossmember-back |
Muffler Part Number |
Kit Only |
Muffler Series |
Super 44 Series |
Tubing Diameter |
2.500 in. |
Tip Diameter |
3.000 in. |
Outlet Outside Diameter |
2.500 in. |
Inlet Diameter |
2.500 in. |
Exhaust Type |
Dual |
Muffler Count |
2 |
Single or Dual |
Dual |
2WD/4WD |
2WD |
Brand |
Flowmaster |
Emission Code |
5 |
Exit Position |
Dual Out Rear |
Heat Shield |
No |
Muffler Quantity |
2 |
Tip Diameter (in) |
3 |
Length |
15.3000 |
Width |
16.3000 |
Height |
53.0000 |
Weight |
58.3000 |