Flowmaster's American Thunder cat-back exhaust system for the 1998-2003 Ford F-150 pickup truck is perfect for the person looking for an aggressive exterior sound level with all of the performance benefits that you would expect from Flowmaster. This system allows you the choice of either dual out the rear exit tailpipes, or dual out the sides behind the rear wheels, which is perfect for towing. The bolt-on 409S stainless steel system fits both the 4.6L and the 5.4L V8 engines and features a Super 40 Series performance muffler and dual 2.50-inch mandrel-bent tailpipes finished off with a pair of large 3.50-inch polished stainless steel tips. This system is designed to fit all 2/4 wheel drives, all wheelbases and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
| Description_ABR |
SYS 98-03 FO |
| Description_SHO |
SYS 98-03 FORD F150 |
| Description_INV |
98-03 FORD F150 ALL AMT DOR/S 409S |
| Description_ASC |
Fits 1998-2003 Ford F-150 with 4.6L or 5.4L engine. Fits both 2/4-wheel drive models. |
| Description_DES |
Flowmaster American Thunder Cat-back Exhaust System |
| Description_EXT |
1998-2003 Ford F-150 with 4.6L or 5.4L engine. Fits both 2/4-wheel drive models. - Aggressive sound |
| Description_MKT |
Flowmaster's American Thunder cat-back exhaust system for the 1998-2003 Ford F-150 pickup truck is perfect for the person looking for an aggressive exterior sound level with all of the performance benefits that you would expect from Flowmaster. This system allows you the choice of either dual out the rear exit tailpipes, or dual out the sides behind the rear wheels, which is perfect for towing. The bolt-on 409S stainless steel system fits both the 4.6L and the 5.4L V8 engines and features a Super 40 Series performance muffler and dual 2.50-inch mandrel-bent tailpipes finished off with a pair of large 3.50-inch polished stainless steel tips. This system is designed to fit all 2/4 wheel drives, all wheelbases and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. |
| Description_FAB |
Large 3.50-inch Polished 304 Stainless Steel Tips |
| Description_FAB |
Dual Outlet Super 40 Series Performance Muffler |
| Description_FAB |
Mandrel-bent Stainless Steel Construction |
| Description_FAB |
Aggressive Exterior Performance Tone |
| Description_FAB |
Uses the Factory Hanger Locations |
| Description_FAB |
Multiple Exit Styles Provided in Kit |
| Description_FAB |
Clears the Factory Spare Tire |
| Description_FAB |
Lifetime Limited Warranty |
| Description_FAB |
Moderate Interior Tone |
| Description_FAB |
Easy Installation |
| Description_ABR |
SYS 98-03 FO |
| Description_SHO |
SYS 98-03 FORD F150 |
| Description_INV |
98-03 FORD F150 ALL AMT DOR/S 409S |
| Description_ASC |
Fits 1998-2003 Ford F-150 with 4.6L or 5.4L engine. Fits both 2/4-wheel drive models. |
| Description_DES |
Flowmaster American Thunder Cat-back Exhaust System |
| Description_EXT |
1998-2003 Ford F-150 with 4.6L or 5.4L engine. Fits both 2/4-wheel drive models. - Aggressive sound |
| Description_MKT |
Flowmaster's American Thunder cat-back exhaust system for the 1998-2003 Ford F-150 pickup truck is perfect for the person looking for an aggressive exterior sound level with all of the performance benefits that you would expect from Flowmaster. This system allows you the choice of either dual out the rear exit tailpipes, or dual out the sides behind the rear wheels, which is perfect for towing. The bolt-on 409S stainless steel system fits both the 4.6L and the 5.4L V8 engines and features a Super 40 Series performance muffler and dual 2.50-inch mandrel-bent tailpipes finished off with a pair of large 3.50-inch polished stainless steel tips. This system is designed to fit all 2/4 wheel drives, all wheelbases and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. |
| Description_FAB |
Large 3.50-inch Polished 304 Stainless Steel Tips |
| Description_FAB |
Dual Outlet Super 40 Series Performance Muffler |
| Description_FAB |
Mandrel-bent Stainless Steel Construction |
| Description_FAB |
Aggressive Exterior Performance Tone |
| Description_FAB |
Uses the Factory Hanger Locations |
| Description_FAB |
Multiple Exit Styles Provided in Kit |
| Description_FAB |
Clears the Factory Spare Tire |
| Description_FAB |
Lifetime Limited Warranty |
| Description_FAB |
Moderate Interior Tone |
| Description_FAB |
Easy Installation |
| 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 |
Clamp-On |
| 9876 |
Angled |
| 1162 |
3.50 |
| 9877 |
Angle Cut |
| 1163 |
Polished |
| 9881 |
No |
| 10104 |
13.00 |
| 1164 |
304 Stainless Steel |
| 1161 |
2 |
| 9878 |
No |
| 10980 |
Round |
| 9875 |
Double Wall |
| 9870 |
Dual Out Side |
| 9870 |
Dual Out Rear |
| 200 |
Natural |
| 353 |
No |
| 3390 |
Performance |
| 4364 |
Yes |
| Heat Shield Included |
No |
| Inlet Diameter |
2.50 |
| 596 |
Clamp-On |
| 9871 |
2.50 |
| 92 |
Yes |
| 9884 |
5.00 |
| 1892 |
10.00 |
| 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 |
2 |
| Muffler Part Number |
Kit Only |
| 4374 |
1 |
| Muffler Series |
Super 40 Series |
| 1174 |
Chambered |
| part type |
Exhaust System |
| 3530 |
409 Stainless Steel |
| Product Type |
Exhaust System |
| Sound Level |
Aggressive |
| 4377 |
No |
| Sub Category |
Exhaust and Tail Pipes |
| 4369 |
2.50 |
| 4376 |
2 |
| Tail Pipe Quantity |
Dual |
| 4370 |
No |
| 26 |
Cat-Back |
| 6014 |
No |
| 2126 |
Not Applicable |
| Warning |
California Proposition 65 |
| Pipe Color |
Silver |
| Drive |
2WD |
| Drive |
4WD |
| 9885 |
10.00 |
| 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 |
Clamp-On |
| 9876 |
Angled |
| 1162 |
3.50 |
| 9877 |
Angle Cut |
| 1163 |
Polished |
| 9881 |
No |
| 10104 |
13.00 |
| 1164 |
304 Stainless Steel |
| 1161 |
2 |
| 9878 |
No |
| 10980 |
Round |
| 9875 |
Double Wall |
| 9870 |
Dual Out Side |
| 9870 |
Dual Out Rear |
| 200 |
Natural |
| 353 |
No |
| 3390 |
Performance |
| 4364 |
Yes |
| Heat Shield Included |
No |
| Inlet Diameter |
2.50 |
| 596 |
Clamp-On |
| 9871 |
2.50 |
| 92 |
Yes |
| 9884 |
5.00 |
| 1892 |
10.00 |
| 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 |
2 |
| Muffler Part Number |
Kit Only |
| 4374 |
1 |
| Muffler Series |
Super 40 Series |
| 1174 |
Chambered |
| part type |
Exhaust System |
| 3530 |
409 Stainless Steel |
| Product Type |
Exhaust System |
| Sound Level |
Aggressive |
| 4377 |
No |
| Sub Category |
Exhaust and Tail Pipes |
| 4369 |
2.50 |
| 4376 |
2 |
| Tail Pipe Quantity |
Dual |
| 4370 |
No |
| 26 |
Cat-Back |
| 6014 |
No |
| 2126 |
Not Applicable |
| Warning |
California Proposition 65 |
| Pipe Color |
Silver |
| Drive |
2WD |
| Drive |
4WD |
| 9885 |
10.00 |
