Gt 40 heads

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11-11-2007, 04:46 PM

drivtech1974

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Join Date: Oct 2007

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Posts: 34

Gt 40 heads

anyone know about how much the heads can support hp wise? they have a mild port job and they are not the p's
thanks

11-11-2007, 04:51 PM

AdderMk2

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RE: Gt 40 heads

about 300

11-11-2007, 05:24 PM

my77stang

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Join Date: Dec 2006

Location: Citrus County, FL

Posts: 8,007

RE: Gt 40 heads

its an amazingfeat that my 306 was making 400 or better with mildly ported 351w heads then huh???

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