Description
Transform your 550SX with HSI 44mm SBN Carb Setup – complete upgrade from finicky Keihin carbs. HSI-built and jetted with choice of PJS manifold or adapter plate. All hardware included except air filter.
550SX Performance Upgrade
- Intake Options: PJS manifold (best flow) or adapter plate
- HSI Prep: Primer fittings, tee-handle adjusters, custom jetting
- Complete Kit: Billet drum, bracket, all gaskets, fuel filter
- Air Filter: NOT included – add ProK separately
Fitment
- 1991-1995 550SX: Reed engine models only
- Port Matching: Required with adapter plate
Lead Time
Summer 2025: 10-14 business days.
Add primer kit and air filter separately.
Part Numbers: Multiple – see description
