Anything larger than the 75mm stock intake opening is a waste of Money and wont perform any better than a Ported stock throttle body that you could do for free..
The larger throttle bodies come with reducer plates that adapt the the larger throttle body opening to the smaller intake opening so you are not really changing anything..
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2002 Z/28 = Firemutt Racing 370 w/ Cam, Trick Flow heads, TPIS 90mm Intake & 90mm T.B., Vigilante 3600 t.c., Michael's Transmissions Built 4L60E.
QTP Headers, Mufflex Stainless Y-pipe, Pypes Performance Exhaust, Moser 12-bolt w/ 33 spline axles,Truetrac & 3:73's., Spohn.
Cartek Tuned...
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