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Mark Ugrich · 05-19-2020, 11:03 AM

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.

05-19-2020, 11:03 AM	#2
Mark Ugrich Member Join Date: May 2011 Location: Auburndale,Florida Posts: 201 Likes: 20 Liked 57 Times in 32 Posts	Re: Flowmaster collector 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.