thanx, i have a 1989 turbo supra.My goal in mods are 3in cat back exhaust,3in downpipe and boost controller. i heard if i go with a bigger turbo it will have slower take of time do to lag.I found a 2.5 pacestter cat back for a na turbo for $200.Hks has a 2.5 cat back for a turbo for $700.My question is whould they both be the same in power,sence they are diff brands? now if I have the heads shaved will,it give me more power? an whatsize metal head gasket whould i need,im new to the supra thing thanx
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