As title says, has anyone received any performance improvement from add ons? Such as cold air, air filter, other bolt ons?.....how bout a tune? I have a lease so that might be an issue.

T

ECU upgrade is currently out, the headers are available as well from RENNtech. As for a bolt on upgrade, you can install some drop in filters, or do a lowering module and rear camber bushings for a handling upgrade. Let us know if we can help you with any information of any RENNtech product.