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Forum: General Q & A

05-13-2011, 09:31 AM

Replies: 0

Compression test results and Gen V 454 Mag / HP425 Differences

Views: 2,044

Posted By RT930turbo

Compression test results and Gen V 454 Mag / HP425 Differences

Long story short, my 303 has a pair of supposedly "warmed up" 454 mags. Externally, however, they look like 425's (Gil manifolds, high rise intake's, etc.) The original owner obviously did some...

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