First Modification
Thanks




It's too open a question to tell you without knowing what you intend to do with the car. Drag racing, street use, car shows, track driving, etc etc
This question has been asked a thousand times at least. Look around a bit.
Generally speaking, for engine performance, the upgrade path is: ROW boxes and filters, tune, delete secondary cats, headers
Dude!
First thing to do is drive it down to Round Rock and come have a chat with me!
you can see some awesome C63's down here, and I can tell you as much as you want to know about them.
See you tomorrow!
Dave




