H.S.I. 3.5" Exhaust CouplerH. S. I. 3. 5" Silicone Coupler for exhaust pipes with 3. 5" diameter flange and needing 2 3 16" length. Connects the exhaust manifold to the chamber on many dry pipe style exhausts. Fits the following applications: BUN Freestyle pipes Power Factor pipe TNT pipe RIVA dry pipe(s) Factory Pipe Products SuperJet Dry Pipes (Type 8, 9, and LTD SS) High temp and high quality silicone that has been thoroughly tested. Part Number: HSI 71 0011 (replacement for

Great for pump shoe or thru hull fitting installs

*Any colors other than black and white may be a couple week wait time

5 Pieces Included

Find a replacement gasket here

Part Number: 31-0002

Offered in 16oz bottles or gallon size

701-81mm / 36cc: 80-YA701M / 80-0009 / Qty 2: 80-YA2136L / Qty 2: 41-BR8ES / 91-0101

Highly recommend adding an impeller tool (WR001) as well

*New 2026 packaging from Mikuni

Bottom end punch never felt so quick

Price for 3/8" is $3

- Pole bushings