Description
Reinforce your exhaust with HSI Heavy Duty Exhaust Hose Clamps – stainless steel clamps that outlast cheap alternatives. Available in 2.5” (single), 2.25” (pair), 3.5” (pair), and 4” (pair) sizes for various PWC exhaust applications.
Clamp Specifications
- 2.5” (70-0011): Single clamp for RN water box or OEM chamber
- 2.25” Kit (70-0012): Pair for BUN chamber to water box
- 3.5” Kit (70-0016): Pair for BUN manifold or dry pipe
- 4” Kit (70-0014): Pair for factory B-pipe coupler
Benefits
- Stainless Steel: Marine-grade corrosion resistance
- Heavy Duty: Prevents snapping under vibration
- Versatile Sizing: Fits multiple exhaust components
- Sold Individually or in Pairs: Flexible purchase options
Applications
- Yamaha: RN water box, SuperJet exhaust
- Kawasaki: BUN systems, dry pipe setups
- Custom Exhausts: B-pipe and aftermarket
Eliminate leaks with HSI’s durable clamps. Select your size.
Part Numbers: 70-0011, 70-0012, 70-0016, 70-0014









