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exhaust question
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Posted by: creed

I have a 2000 400ex with k&n air filter, dynojet kit and FMF powerbomb header with FMF mighty max silencer with 10 discs and quite core still in. im getting started in racing the track is half supercross and half mx. i have good bottom end with my setup. ive read that if i add a couple more discs and take out core then rejet i will get more top end, being new to racing i dont know if this would benifit me any. so my question is for the racing i will be doing do i want bottom or top? im also looking into getting a new rev box whats a good one to get?