should i get a mail order tune?
#2
If you removed AIR and EGR and have an ORY, it's probably throwing codes and you'll atleast need to get those tuned out. But, a tune never hurts to have, so you might as well get one. Go with whichever one is cheaper or closer. From what I've heard, you can't go wrong with either one really. I'm going to go with MadZ28, just because they're only about 2 hours away and I can drive there to have it done.
#3
Go with Brian at PCMFORLESS he does a great job. Pulled an exta 15 hp from his tune on the dyno. Be sure to get the LT4 knock module put on too.
#4
#6