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Member
Join Date: May 2011
Location: Auburndale,Florida
Posts: 220
Likes: 29
Liked 71 Times in 38 Posts
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It was a long time ago , but I tried a set on my 302 bracket motor. I believe I had the bung for the evac placed after the small tubes in the final exit pipe. I never played with them on a dyno, but I don’t remember seeing anything at the track. My advice would be get a set of merge collectors.The 421 deal might pick up a little, but I think it would be more of a fine tuning adjustment.
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