JR Race Car#574-ZRK-7000ZR4 Engine Kit
JR Race Car ZRK-7000 - JR RACE CAR ENGINES Details
ZR4 3 1/2" complete engine kit, capable of going 7.90 with a 450-480 lb package at sea level.
JR Race Car has an engine for any level of Jr Drag Racing. From their 12.90 Raptor based motor all the way to their 3 3/4" bore Titan motor. Check out the information on each engine, you are sure to find one that fits your needs. Also available are engine kits for the crew chief who likes to do his own engines.