XDP Harmonic Balancer Bolt for Chevy/GMC (2001-24) 6.6L Duramax LB1/LLY/LBZ/LMM/LML (Black-Phosphate)

XDP Harmonic Balancer Bolt for Chevy/GMC 6.6L Duramax LB1/LLY/LBZ/LMM/LML (Black-Phosphate) The XDP Harmonic Balancer Bolt XD628 is an excellent way to securely fasten the harmonic balancer on your Duramax. As the crankshaft Flexes the harmonic balancer (also known as a damper) absorbs an incredible amount of energy to smooth out your engine. This bolt will ensure that your balancer is locked into position and features an extra tall 12-point head that accepts a deep socket. This eliminates any worry of stripping the head when torqueing to specification