Thread: Exhaust size
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Old 04-02-2020, 05:52 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
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Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,579
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A 455+ Pontiac is not going to worry about low end TQ!! My 78 has a "tight" Continental Convertor and a 239/247 HFT and has perfect street manners. Weighing 3750 in good air(rare in Houston) can run 10.90s more weight and 100 degree Texas weather 11.50s-which is good for the tracks that are strict on roll bar rules.

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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs