Rattsl Posted February 8, 2013 Share Posted February 8, 2013 I'm picking up a Stealthback tomorrow morning from a guy who had it on his STI, and I'll be using it on my LGT. Point is, I'd like to install it and not have the tuner charge me an arm and a leg for it. However, because it's gonna be a Stealthback, which is not replacing any cats, but just letting a bellmouth take care of the turbo outlet and wastegate, will the car start throwing random codes or CEL? I just figured, yes...it will notice higher flow, but I am keeping all 3 cats on there until I get my Up pipe installed, which then, I will get a tune. Any clues? Link to comment Share on other sites More sharing options...
StoplightAssassin Posted February 8, 2013 Share Posted February 8, 2013 You'll need a tune. Do it right. Technically all you need to be stg 2 is a shorty dp and tune. Link to comment Share on other sites More sharing options...
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