Quote:
Originally Posted by Z1R rider
My next step was to find a used Muzzy header. It was then 2 mph faster than my gutted mufflers and 4 mph faster than stock. All jetting is stock, I know everybody says you need to rejet, and we did the rejetting thing on two different pregens and they both are fastest with stock jetting. Jetting is still a tiny bit rich at wide open throttle but close enough. BTW we are at 1300 ft. above sea level.
ps: also running stock airbox and stock air filter
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I have a used Muzzy 2-into-1 header also. How did you finish the rest of the exhaust, midpipe and muffler, or did you just run the header?