View Full Version : Imco thumper exhaust manifolds
KRAVEN
01-16-2002, 09:02 PM
Does anyone have info about Imco exhaust manifolds,looking to upgrade my SCORPION>
oldLenny
01-16-2002, 09:12 PM
Stainless Marine is also very popular...
http://www.stainlessmarine.com/..
Hardonzi
01-17-2002, 06:28 AM
I have the thumpers on my 350 mag.picked up 3mph with that and open exhaust.I bought the Gaffrig slash cut with the internal ss flapper,and it sounds like a 500efi when throttled. biggrin.gif
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