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we just put slp longtubes on an 05 with k&n cold air at gtodealers dealership and he didnt have to have it tuned but if you want the most for your money get it tuned just to get that last bit of power out of it. :cheers btw the 05s run a ton better with lts.
 

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Ditto on the tune...but you dont have to.
All I have is a Predator that I can play with.....I'm waiting till after the cam install before I dyno.
 

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I agree with 04gtolover, Gary is very happy with his car and plans on getting a tune after we do a cam swap. 05GTO pm me and I'll hook you up on prices! :cheers
 
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