Well Man, I went 2 1/4 for my single catback i would suggest this...2.5 is very big and may cause a loss in hp/tq..however im thinking that the turbo will run like 2.5-3 becuase of the other 4 cyl turbos i have seen use that size...I myself have toyed with the idea of dual exuast..if i was you i would stay with the 2 1/4
ZTEC..Custom Abs Intake. 2 1/4 Catback Exaust (No Res)..Accel Coil, Accel Wires,Magnaflow muffler,Clear Corners,Removed Ding Guards..Fuel Cutoff Disable Switch,blue)...Headers,Turbo,Neon Underbody lights comming soon
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