Gabro Racing 660 VARIABLE Velocity Stacks Kit - VA-660Variable
As the attached dyno graphs show, these variable velocity stacks marginally improve horsepower, but especially improve torque at the RPM range critical for corner exit and acceleration...
For owners with the UpMap module for RS660 this product comes with a map specfically developed to get maximum gains from these stacks and your chosen brand of exhaust.
Installation instructions are being written and will be uploaded when available.
This short (But LOUD) youtube video shows the stacks in action.
**Use of Medium Strength Threadlock when securing the velocity stacks is absolutely critical.
Please note: Some images may show prototype or pre-production parts. Appearance of final delivered product may not 100% match photos.