H.S.I. 2.5" to 2.0" - 90* Exhaust CouplerH. S. I. Silicone Coupler 2. 5" Reduced to 2. 0" diameter with 90* Elbow. Good for Yamaha SupereJet FP B Pipes with a lay down style water box or universal applications. High temp and high quality silicone that has been thoroughly tested. Part Number: HSI 71 0008

and silver anodizing

*Upper rod (wrist pin) bearings can be found here

blue and black

You will need to remove your red and green buttons with the rubber seal OR purchase separately

Billet tie down loop attachment point for Yamaha reduction nozzle ear

Note for SuperJet Use: Tall Velocity Stack can still be paired with a 3" SE stainless filter and clear the OEM hood

*Recommended to install breather hose that extends close to the bottom of the hull with installing a hood scoop

and 760cc OE replacement starter motor

-Choose pump gas or race gas domes

Designed to maximize the freestyle / freeride performance of the 144mm 4SJ stubby pump cone

eliminating the need for risky alternatives like stuffing a rope down your cylinder

OEM Yamaha Fuel Selector / Fuel Petcock Knob for All Yamaha 2-Stroke Watercraft