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jelrod05
08-16-2009, 08:51 PM
what is better the hmf sports series slip on or the procircuit t4 slip on. what will give more torqe and horsepower.

honda400ex2003
08-16-2009, 09:01 PM
not sure on the hmf but here is the dyno chart for the t-4. i like it alot but have never used an hmf. steve