Holley Performance 97-321 Harmonic Balancer Bolt

Harmonic Balancer Bolt

Harmonic Balancer Bolt; For Chevy Big Block 396-454 w/Mid Mount Accessory Drive System; 12 Point; .5 in. Wrench Size; .200 in. Thick Washer; Black;

Replacement harmonic balancer bolt with thick washer for Big Block Chevy Mid-Mount Accessory drive system. 12-Point, 1/2 in. Wrench Size, 1/2 in.-20 x 2.500 in. Under Head Length, Washer diameter 1.5 in. x 0.200 in. Thick.

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR Sprint Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Exhaust, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.