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

• The engine reaches its maximum speed in less time

• Increased responsiveness of the engine during the reopening of thottle

• Reduces the loss of engine power on approaching the rev limiter

• Amazing intake sound

Dynamometers results:

Power-Torque/Rpm

Info: 

Triumph Daytona 2008 with Leovince full exhaust

Linea blu = Stock velocity stacks   

Linea rossa = Venturisystem velocity stack without AFR tune

Tested by Imperiale moto di Sergio Imperiale

Contents of a package:

• 3 racing velocity stacks racing made by CNC machines
• 1 support brackets made of stainless steel laser cutting machines
• Screws
• pack of medium strength Loctite
• 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

Shipping & Returns

Payment methods

Technical Development

What does it mean AFR?