This American Thunder® Crossmember-Back exhaust system is designed for all 1964-1966 Ford Mustang hardtop coupes with a V8 engine. The system features a free-flowing 2.50-inch mandrel-bent stainless steel H-pipe flowing into a pair of 40 Series Delta Flow® mufflers for maximum power and that deep iconic sound. The 2.50-inch mandrel-bent stainless tailpipes tuck up high and are finished off with a pair of long 2.50-inch 304 stainless steel tips for that show car look. Includes all necessary parts, hardware and easy to follow instructions and is covered by our Lifetime Limited Warranty. Note: Does Not fit GT models or convertibles.
| Description_ABR |
SYS 64-66 MU |
| Description_SHO |
SYS 64-66 MUSTANG V8 |
| Description_INV |
64-66 MUSTANG V8 AMT 409S |
| Description_ASC |
Does not fit GT or convertible models. |
| Description_DES |
Flowmaster American Thunder Crossmember-Back Exhaust System |
| Description_EXT |
Fits 1964-1966 Mustang, 2.50-inch stainless steel system. - Aggressive to moderate sound |
| Description_MKT |
This American Thunder® Crossmember-Back exhaust system is designed for all 1964-1966 Ford Mustang hardtop coupes with a V8 engine. The system features a free-flowing 2.50-inch mandrel-bent stainless steel H-pipe flowing into a pair of 40 Series Delta Flow® mufflers for maximum power and that deep iconic sound. The 2.50-inch mandrel-bent stainless tailpipes tuck up high and are finished off with a pair of long 2.50-inch 304 stainless steel tips for that show car look. Includes all necessary parts, hardware and easy to follow instructions and is covered by our Lifetime Limited Warranty. Note: Does Not fit GT models or convertibles. |
| Description_FAB |
Includes Hangers and Hardware for an Easy Installation |
| Description_FAB |
Mandrel-bent 16-gauge Stainless Steel Tubing |
| Description_FAB |
40 Series Delta Flow Performance Mufflers |
| Description_FAB |
Long Polished Stainless Steel Tips |
| Description_FAB |
Includes Built-in "H" Balance Pipe |
| Description_FAB |
Moderate Exterior Exhaust Tone |
| Description_FAB |
Lifetime Limited Warranty |
| Description_FAB |
Crossmember-Back System |
| Description_ABR |
SYS 64-66 MU |
| Description_SHO |
SYS 64-66 MUSTANG V8 |
| Description_INV |
64-66 MUSTANG V8 AMT 409S |
| Description_ASC |
Does not fit GT or convertible models. |
| Description_DES |
Flowmaster American Thunder Crossmember-Back Exhaust System |
| Description_EXT |
Fits 1964-1966 Mustang, 2.50-inch stainless steel system. - Aggressive to moderate sound |
| Description_MKT |
This American Thunder® Crossmember-Back exhaust system is designed for all 1964-1966 Ford Mustang hardtop coupes with a V8 engine. The system features a free-flowing 2.50-inch mandrel-bent stainless steel H-pipe flowing into a pair of 40 Series Delta Flow® mufflers for maximum power and that deep iconic sound. The 2.50-inch mandrel-bent stainless tailpipes tuck up high and are finished off with a pair of long 2.50-inch 304 stainless steel tips for that show car look. Includes all necessary parts, hardware and easy to follow instructions and is covered by our Lifetime Limited Warranty. Note: Does Not fit GT models or convertibles. |
| Description_FAB |
Includes Hangers and Hardware for an Easy Installation |
| Description_FAB |
Mandrel-bent 16-gauge Stainless Steel Tubing |
| Description_FAB |
40 Series Delta Flow Performance Mufflers |
| Description_FAB |
Long Polished Stainless Steel Tips |
| Description_FAB |
Includes Built-in "H" Balance Pipe |
| Description_FAB |
Moderate Exterior Exhaust Tone |
| Description_FAB |
Lifetime Limited Warranty |
| Description_FAB |
Crossmember-Back System |
| Brand |
Flowmaster |
| California Proposition 65 |
Yes |
| California Proposition 65 Chemical Name |
Nickel (Metallic) |
| California Proposition 65 Chemical Name |
Chromium (hexavalent compounds) |
| CARB (California) Compliant |
Yes |
| Catalytic Converter Included |
No |
| 2874 |
0 |
| Category |
Exhaust |
| 3728 |
Flat Band |
| 1882 |
Yes |
| Emission Code |
5 |
| Exhaust Series |
American Thunder |
| 11205 |
Silver |
| 9874 |
Welded |
| 9876 |
Angled |
| 1162 |
2.50 |
| 9877 |
Slash Cut |
| 1163 |
Polished |
| 9881 |
No |
| 10104 |
29.125 |
| 1164 |
304 Stainless Steel |
| 1161 |
2 |
| 9878 |
No |
| 10980 |
Round |
| 9875 |
Single Wall |
| 9870 |
Dual Out Rear |
| 200 |
Natural |
| 353 |
No |
| 3390 |
Performance |
| 4364 |
Yes |
| Heat Shield Included |
No |
| Inlet Diameter |
2.50 |
| 596 |
Weld-On |
| 9871 |
2.50 |
| 92 |
Yes |
| 11021 |
4.00 |
| 11022 |
13.00 |
| 11023 |
9.75 |
| 11064 |
Chambered |
| 11048 |
4.00 |
| 11049 |
13.00 |
| 11050 |
9.75 |
| 11073 |
Chambered |
| 9884 |
4.00 |
| 1892 |
13.00 |
| 4372 |
409 Stainless Steel |
| 4373 |
Oval |
| 9882 |
Black High-Temperature Paint Finish |
| 4367 |
No |
| 4368 |
No |
| Muffler Included |
Yes |
| 9962 |
Slip-Fit |
| 4365 |
2.50 |
| 4366 |
2.63 |
| 9963 |
Slip-Fit |
| 4375 |
1 |
| Muffler Part Number |
Kit Only |
| 4374 |
2 |
| Muffler Series |
40 Series Delta Flow |
| 1174 |
Chambered |
| part type |
Exhaust System |
| 3530 |
409 Stainless Steel |
| Product Type |
Exhaust System |
| Sound Level |
Aggressive / Moderate |
| 4377 |
No |
| Sub Category |
Exhaust and Tail Pipes |
| 4369 |
2.50 |
| 4376 |
2 |
| Tail Pipe Quantity |
Dual |
| 4370 |
No |
| Type |
Crossmember-back |
| 6014 |
No |
| 2126 |
Not Applicable |
| Warning |
California Proposition 65 |
| Pipe Color |
Silver |
| Drive |
2WD |
| 9885 |
9.50 |
| Brand |
Flowmaster |
| California Proposition 65 |
Yes |
| California Proposition 65 Chemical Name |
Nickel (Metallic) |
| California Proposition 65 Chemical Name |
Chromium (hexavalent compounds) |
| CARB (California) Compliant |
Yes |
| Catalytic Converter Included |
No |
| 2874 |
0 |
| Category |
Exhaust |
| 3728 |
Flat Band |
| 1882 |
Yes |
| Emission Code |
5 |
| Exhaust Series |
American Thunder |
| 11205 |
Silver |
| 9874 |
Welded |
| 9876 |
Angled |
| 1162 |
2.50 |
| 9877 |
Slash Cut |
| 1163 |
Polished |
| 9881 |
No |
| 10104 |
29.125 |
| 1164 |
304 Stainless Steel |
| 1161 |
2 |
| 9878 |
No |
| 10980 |
Round |
| 9875 |
Single Wall |
| 9870 |
Dual Out Rear |
| 200 |
Natural |
| 353 |
No |
| 3390 |
Performance |
| 4364 |
Yes |
| Heat Shield Included |
No |
| Inlet Diameter |
2.50 |
| 596 |
Weld-On |
| 9871 |
2.50 |
| 92 |
Yes |
| 11021 |
4.00 |
| 11022 |
13.00 |
| 11023 |
9.75 |
| 11064 |
Chambered |
| 11048 |
4.00 |
| 11049 |
13.00 |
| 11050 |
9.75 |
| 11073 |
Chambered |
| 9884 |
4.00 |
| 1892 |
13.00 |
| 4372 |
409 Stainless Steel |
| 4373 |
Oval |
| 9882 |
Black High-Temperature Paint Finish |
| 4367 |
No |
| 4368 |
No |
| Muffler Included |
Yes |
| 9962 |
Slip-Fit |
| 4365 |
2.50 |
| 4366 |
2.63 |
| 9963 |
Slip-Fit |
| 4375 |
1 |
| Muffler Part Number |
Kit Only |
| 4374 |
2 |
| Muffler Series |
40 Series Delta Flow |
| 1174 |
Chambered |
| part type |
Exhaust System |
| 3530 |
409 Stainless Steel |
| Product Type |
Exhaust System |
| Sound Level |
Aggressive / Moderate |
| 4377 |
No |
| Sub Category |
Exhaust and Tail Pipes |
| 4369 |
2.50 |
| 4376 |
2 |
| Tail Pipe Quantity |
Dual |
| 4370 |
No |
| Type |
Crossmember-back |
| 6014 |
No |
| 2126 |
Not Applicable |
| Warning |
California Proposition 65 |
| Pipe Color |
Silver |
| Drive |
2WD |
| 9885 |
9.50 |
| Year |
Make |
Model |
Submodel |
Notes |
| 1964 |
Ford |
Mustang |
Base |
Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible |
| 1964 |
Ford |
Mustang |
Base |
Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible |
| 1965 |
Ford |
Mustang |
Base |
Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible |
| 1965 |
Ford |
Mustang |
Base |
Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible,Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible |
| 1966 |
Ford |
Mustang |
Base |
Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible,Polished Tip Finish, Aggressive to moderate sound, Does Not Fit GT or Convertible |
