FMF Factory 4.1 RCT Exhaust System - Kawasaki KX450 / KX450X (2024-2026)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
Step up to the FMF Factory 4.1 RCT full exhaust system for your 2024-2026 Kawasaki KX450 or KX450X. Built around FMF's Resonance Chamber Technology inside and out, the Factory 4.1 RCT delivers power gains across the entire RPM range while cutting weight off the bike. Its shorter overall length keeps the muffler tucked closer to the motor to centralize mass and reduce crash damage. The pipe is made from FMF's proprietary-blend stainless steel and the muffler from aerospace-grade materials, all manufactured at FMF's Southern California factory.
✓ Fits:
- 2024-2026 Kawasaki KX450
- 2024-2026 Kawasaki KX450X
✓ Features:
- Complete full system: stainless steel head pipe and Factory 4.1 RCT muffler
- Resonance Chamber Technology for strong power gains from bottom end to top end
- Significant weight savings over the stock exhaust
- RTS (Rapid Tuning System) with interchangeable inserts
- Gray anodized aluminum muffler body with a black carbon fiber end cap
- Shorter, mass-centralized design that is less prone to crash damage
- Made in the USA by FMF in Southern California
✓ What's Included:
- Stainless steel head pipe
- Factory 4.1 RCT muffler with carbon fiber end cap
- Spark arrestor screen insert
- 94dB sound insert
For closed course competition use only.
Ships fast from DuneGoonShop!
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
