if you're going to buy stage 2 because you are worried about your warranty, let the dealer who does your warranty work install it, and double check with them to make sure it is agreeable with your warranty.
as for anything else, i would suggest intake, header, downpipe, and exhaust.
any exhaust shouldn't affect your warranty regardless of whether it's corsa, gmpp, or any other brand and regardless of who installs it. it's just an exhaust.
BUT, if you're that afraid of losing your warranty i would suggest not modding at all.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
custom valve tap