For anyone considering building their own headers, I recommend 'Pipemax', a downloadable software program written by ex-racer Larry Meaux. It's commonly used by many pro race teams in the U.S. It's only $75USD and runs on any PC. By the time you gather the data the program needs to calculate sizes, lengths and other stuff, you'll be far more familiar with your engine! WWW.maxracesoftware.com
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