+ 3 HP top end and consistent power to the wheel of 52-53.5 HP
Dyno chart in the gallery is of a stock engine Ninja 400 with full Sparks Exhaust, BAUCE Racing ECU flash, spears velocity stacks and unmodified airbox.
DESCRIPTION
Spears Racing have developed new, innovative Kawasaki Ninja 400 Superbike/Supersport Velocity Stack Kit. This innovative revolutionary design is backed by real dyno testing and our Corbin Custom Design engineering staff. Our stacks will improve torque/HP and smooth out power delivery. This allows the rider a truer feel for the throttle which enables more accurate throttle input, improves confidence to get on the throttle sooner and boosts rider confidence.
The OEM Air box of the stock “commuter bike” Ninja 400 contains two different length velocity stacks, one long, one short and two small intake tracks which severely limit the air intake into the engine. This kit replaces both OEM Rubber Stacks with our own Spears Racing Rubber manifolds and our Spears Racing Ribbed velocity stacks and instructions to modify your current OEM air box. These shorter velocity stacks not only allow more air into the engine, but they also smooth out the increased flow of air to really maximize the benefit.
