Hey guys thanxs for the info.. yeah i forgot to mention that I already put an Air intake on it.. its a MAC Cold Air, and I also have a MAC Short shifter in it.. I'd Knig Snake- My mufflers are chambered, but the mandrel bent tubes a 2.50.. Yeah I'll go with u guys on the High flow cats.. And also correct me if im worng but so far the biggest throttle body for the 4V's is the 63mm?? If not which is the biggest and who makes it?? thank's dude's for all ure help..and keep smokin them Chevy's
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