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 Junior Drag Racing... from the 12.90 Raptor-based motor all the way to Titan 3-3/4" bore motors. Review each engine's specifications to find which one meets your needs. Engine kits also available for Crew Chiefs who like to do their own engines.