Thanks, I'll look into the Brock genIII but to swap out a yosh for a Brock would be another $1200 to gain maybe 2hp over a Yosh? Might not be worth it. You correct also about the airbox mod on a Dyno. I saw a difference also but you won't see the full effect until your out on the highway, or data log on the track. My tuner agreed and we both calculated about another 3hp at or above 140hp.
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