Description:

Racing velocity stacks  developed on dynotune (Dynojet i250) and tracks,designed to use on circuits and driveways. Prohibited use on public roads

• Increase power and torque at the mid and high rpm

• Greater rapidity of the engine to increase the revs on the whole power range

• Greater reactivity of the engine during the throttle openings

•  Reduces the power decay of the engine toward the limiter

• Amazing intake sound

• Kit is designed to works with the variable geometry system

Dynamometers results:

Hp/Rpm

Hp/Time

Torque/Rpm

Hp/Speed

Speed/Time

Test info:

Bmw S1000rr with full exhaust system Arrow and Ecu Rapidbyke evo

Blu line = Stock kit 

Red line = Venturisystem kit 

Contents of a package:

• 4 racing velocity stacks racing made by CNC machines
• 4 rubber gaskets
• assembly instructions

Warnings:

The kit increases the air intake into the engine so may need to adjust the AFR (air-fuel ratio)

More Air =  AFR lean

Kit is designed to works with the variable geometry system

Shipping & Returns

Payment methods

Technical Development

What does it mean AFR?