Description
Tune your exhaust with HSI Inline Water Restrictor – 3/8” inline device accepts Mikuni main jets (150+ recommended) for constant water flow restriction. Dries out stinger for crisper throttle and consistent power, ideal with flow control valves.
Stealth Tuning
- Fit: 3/8” cooling line
- Jet Compatible: Mikuni N102.221 series
- Constant Restriction: Unlike adjustable valves
- Min Jet: 150 (do not go lower)
- Jet Not Included: Add separately
Performance Gains
- Crisp Throttle: Reduced water in stinger
- Consistent Power: All RPM ranges
- Stinger Tuning: Pair with flow valve
Applications
- Freestyle: Quick response
- Race: Tunable exhaust backpressure
- Modded Skis: Piped engines
Simple, effective, stealth. Dial in your pipe.
Part Number: HSI-70-0004
