Hi all. I bought a r34 gtt in January. Was 100% stock. I've done front end exhaust 3" stainless steel and then from catback is stock and I've put a pod filter in. I've been told I should have a tune as I do each mod. Is this true and if so is there a tune I can do for the pod filter or is there only one type of tune and it will be the same price every time? I plan in getting a intercooler in the next week. Should I have it tuned before I get this installed or wait? I've been told by doing a few mods and not tuning it I can damage. The engine?
Any help would be great.
Cheers