JR Race Car is currently the manufacturer for the Hercules Chassis, Shockwave Clutches. As an engine builder, JR Race Car has made the ZR, and ZR-4 and Titan Engines (with roller lifter technology). We have the setup for every jr drag racer whether you want to race 12.90, 8.90 or 7.90. We supply everything from turn key chassis, to engine parts and clutch parts. JR Race Car is also the only manufacturer to make a full billet block for the "open class" Briggs and Stratton animal for Karting.