Im going to put race longtubes, ory and rumbler cat back on my car this weekend - will i need to get the mailorder tune now or can it wait? I know my check engine light will be on because of the rear o2 sensors, but what about the air pump delete? Will it make any difference?

 

bump

 

There won't be any negative effects towards the driveability of the car. Just an annoying SES light which you are alreay aware of.

 

Get the PCMforless.com tune and get some serious HP/TQ freed up!

 

running my '00 Z28 right now without a tune. did LTs, ORY, !AIR/!EGR, LS6 intake, 160 t-stat, 78mm TB..it ran choppy at first but the more i drove the car the more it started to react to the mods. i am getting a dyno tune this weekend. cant wait to see how it does after that

 

You can get just the AIR, rear O2s, and EGR deleted.