The comp cars by the old finishline motorsports out of Las Vegas are running Jerico, Tex Racing or G force 4 speeds. You can pick each gear ratio for all 4 gears, comes with internal
oil pump to which you hook up radiator. Straight cut gears with dog rings. Mag case with Teflon coating and o ring seals. I like the slight whine, I think its kind of cool. Also shift with no clutch if you want is fun also. Some of the Viper guys run them.