Fast 90/90
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Originally Posted by c5_ls1_6spd
i have the TSP ls6 stage 1 heads, would it be worth the time and money to port match my FAST 90 manifold?
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Originally Posted by LightEmUpLs1
i would say 15 to 20 rwhp
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Originally Posted by c5_ls1_6spd
i already have a FAST 90 on my car and tuned....are you saying if i port my FAST and retune it, i could pick up 15-20 more rwhp? or would it be more like an additional 5-7rwhp over the unported FAST...