For GM 3300 and 3800 V6 cylinder engineComes in clam-shell packageComes in a clam shell packageLisle Harmonic Balancer Puller is equipped with the special bolts and adapters to pull the harmonic balancer cleanly without damage to the crank sensor. This product is for GM 3300 and 3800 V6 cylinder engine. It comes in a clam-shell package.