Relocate your stock Jeep camshaft position sensor to the front of the 4BT and weld the the tone ring onto the front pulley to create the correct pulse signal for the stock jeep tachometer. Ensure to order the correct kit! If your jeep was originally a 6 cylinder, please see the 6 cylinder kit. The pulse pattern is different between the 4 and 6 cylinder jeep computers. This kit is for Jeeps that were originally 4 cylinders. Includes hardware to mount sensor to bracket. Sensor NOT included.