UPDATE: Just got off the phone with bobby at vsr and my built motor goes out tomorrow!!!! And for those wondering those gtm exhaust manifolds have been perfected (thanks to me and my grinder) and being shipped to vsr tomorrow to have them make better one's in which hopefully won't have to be drilled or tapped. Opening that up the exhaust manifold that 1/4 of an inch should help the flow a lot. After measuring it's like 20% bigger now and matches the gasket.
Last edited by COSMO; 03-18-2014 at 07:55 PM.
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