Description
FMF Factory 4.1 SL Slip-On Exhaust
FMF’s Factory 4.1 SL slip-on muffler is guaranteed to produce more horsepower throughout the entire RPM range when compared to the stock muffler. Each Factory 4.1 SL muffler is constructed from only aerospace grade materials that meet the California company’s exacting specifications.
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Massive power gains throughout the RPM range
Significant weight savings when compared to the stock muffler
Fabricated using the highest quality alloy grade materials
Fits OEM or FMF headers
Comes with all required mounting hardware and easy-to-follow installation instructions
FMF 94 dB quiet insert available (sold separately)
Made in the USA
Product Note:
| Color | Varies (make selection above) |
| Configuration | Single Muffler |
| Country of Origin | USA |
| Finish | Varies (make selection above) |
| Mid-Pipe | Varies (make selection above) |
| Muffler End Cap | Stainless Steel |
| Muffler Sleeve | Titanium |
| USFS Approved Spark Arrestor | Varies (make selection above) |
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