Schnitz Billet Velocity Stacks Suzuki GSX1300R Hayabusa (99-07)

Product Description

These aluminum stacks are machined from solid billet and feature an elliptical flare to 79.5mm dia. to provide to optimum capture coefficient in addition to properly matching the 50mm ID of the throttle body. The result is improved flow capability. Molded neoprene seals are included which fit the Hayabusa airbox exactly.

Three lengths of velocity stacks are offered; 41mm (same length as stock Hayabusa short rubber stacks), 60mm and 72mm (approx. the same length as stock Hayabusa long rubber stacks). The long stack are offered as a set paired with a set of short stacks to match the stock Hayabusa setup but offer improved flow capability and torque (HAY1017-STREET). In addition, a tuner’s set is offered which includes 4 x 41mm stacks, 4x 60mm stacks and 2 x 72mm stacks, and one set of seals.

The optimum set up for your bike depends on the modification of the bike and your objectives. Some general guidelines are:

41mm stacks- Best used on highly modified engines long duration cams with 4:1 exhaust, where horsepower at high rpm is desired.

2 x 41mm + 2 x 72mm street stacks- Best used on relatively stock bikes where the stock torque band is retained but improved.

60mm stacks- A compromise between the former two combinations. Works well with stock bikes and modified bikes. It will provide improved hp in the mid to upper rpm band.