WTB Aftermarket Runners
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03-10-2013, 06:01 PM
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Car: 1991 firebird XS
Engine: 5.7 tbi
Transmission: stock 700r4
Axle/Gears: 9 bolt 3.23
Re: WTB Aftermarket Runners
i just pulled an entire tpi off of a c4 vette motor and i do not believ the runners or upper are stock, i can see all the way throuh the upper and it is well...hollow, i thought the factory ones had little walls to break up airflow in them? also the lower intake is ported slightly and the runners inner dia are larger than the previous wnres gaskets that he used, im thinking he bought aftermarket runners and upper then used stock unmodified gaskets...make an offer im resaerching the specifics on all of this now...
03-10-2013, 06:41 PM
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Car: 1989 Iroc Z L98
Re: WTB Aftermarket Runners
i just pulled an entire tpi off of a c4 vette motor and i do not believ the runners or upper are stock, i can see all the way throuh the upper and it is well...hollow, i thought the factory ones had little walls to break up airflow in them? also the lower intake is ported slightly and the runners inner dia are larger than the previous wnres gaskets that he used, im thinking he bought aftermarket runners and upper then used stock unmodified gaskets...make an offer im resaerching the specifics on all of this now...
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