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Re: 4g!
Wow, the gains from the long tubes is a lot.
The gain differences between the long tube and short tube might not actually be that much, if nothing else is restricting them. Has anyone tested the shorties? We have done swaps from shorties to long tubes on NA 300whp Mustangs and there haven't been power gains on the dyno. Maybe there would be real gains on a more crazy, bigger displacement, higher power NA build.
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