KTM Factory 4.1 RCT Slip-On Exhaust | FMF Performance Muffler for KTM
$137.33
Description
KTM Factory 4.1 RCT Slip-On Exhaust | FMF Performance Muffler
Tackle trails harder with FMF’s precision-engineered slip-on exhaust system—designed exclusively for KTM motorcycles to boost low-end torque while slashing up to 2 lbs in unsprung weight compared to OEM setups (measured on Dynojet E3). The proprietary 4.1-inch chamber optimizes scavenging efficiency across RPM ranges (+6 HP at peak), paired with aerospace-grade stainless steel construction that withstands extreme heat cycles (over 2x longer tube life than generic aluminum models).
Key Features:
✔️ FMF Quad-Power Technology: Multi-stage baffle design reduces dB levels by 8–10% vs aftermarket competitors while retaining 90% of header-driven torque gains
✔️ Direct Bolt-On Fitment: Works seamlessly with factory header pipes (no welds required) on 2020–2023 SX/F/EXC models (includes Duke/Adventure platforms)
✔️ EPA Compliant: Meets CARB certification standards for street legality (stock-exhaust compliant tuning not required)
| Specification | Stock Exhaust | FMF Factory 4.1 |
|---|---|---|
| Weight | ~7 lbs | 5 lbs (+40% lighter) |
| Noise Reduction | -5 dB | -12 dB |
| Low-RPM Torque Gain | +2% | +8% |
Ideal for dual-sport riders seeking smoother throttle response without sacrificing trail-compliant sound levels (68–72 dB range). Backed by a 3-year corrosion warranty, outperforming entry-level competitors that fail prematurely due to thinner gauge steel (0.28mm vs FMF’s military-grade 0.35mm walls).
Rider-focused upgrade: Preserves OEM ECU compatibility (no reflashing required) while delivering MX-style acceleration cues through strategically placed perforations in our proprietary ‘RCT’ muffler core design – engineered specifically for KTM’s liquid-cooled engine architectures since 2017 revisions.*
