well you do know that the case is that they will quickly blame some mod for problems that arise with your car. In which case its no longer them having to prove that it caused it but rather you are responsible for proving that it wasn't the cause of the problem. But most parts just void the warranty of the part it replaced..
Suspension such as doing your own shocks/springs I would say fvoids your suspension warranty, CAI voids your intake warranty and you get the idea
Suspension such as doing your own shocks/springs I would say fvoids your suspension warranty, CAI voids your intake warranty and you get the idea