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Harmonic Balancer Bolts

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Harmonic Balancer Bolts

What’s the big deal about harmonic balancer bolts? As the revs of your high-performance engine rise, your crankshaft starts to flex. The harmonic balancer press fit...

What’s the big deal about harmonic balancer bolts? As the revs of your high-performance engine rise, your crankshaft starts to flex. The harmonic balancer press fit to the end absorbs those vibrations, protecting your main bearings and crankshaft bearings while keeping your engine running smoothly. On most engines, a single bolt locks the harmonic balancer in place, so you better make sure it’s a good one—get it from Summit Racing Equipment!

Many stock harmonic balancer bolts are torque-to-yield (TTY) bolts, which means they shouldn’t be reused. So, whether you’re replacing a stock balancer, or upgrading...

What’s the big deal about harmonic balancer bolts? As the revs of your high-performance engine rise, your crankshaft starts to flex. The harmonic balancer press fit to the end absorbs those vibrations, protecting your main bearings and crankshaft bearings while keeping your engine running smoothly. On most engines, a single bolt locks the harmonic balancer in place, so you better make sure it’s a good one—get it from Summit Racing Equipment!

Many stock harmonic balancer bolts are torque-to-yield (TTY) bolts, which means they shouldn’t be reused. So, whether you’re replacing a stock balancer, or upgrading to a durable race-ready model, you should get new hardware for it as well. Most of the bolts we carry are reusable, so your next service or upgrade projects will be even easier!

Summit’s powerful search tools make it simple to find the right harmonic balancer bolt for your application. You can search by Make/Engine to find a stock replacement, or by dimensions, thread count, or tensile strength rating for your aftermarket crank.

Top Brands


With so much of your engine project depending on it, your harmonic balancer bolt should be second to none. That’s why Summit only partners with trusted hardware manufacturers like ARP, ATI Performance Products, Stage 8 Locking Fasteners, Dorman, Milodon, Mr. Gasket, Earl’s Performance, Moroso, and more.

Individual Parts

Results 1 - 25 of 28

Harmonic Balancer Bolt, 1.062 in. 12-Point Head, 4.325 in. UHL, Chromoly, Black Oxide, LS Gen. III/IV, Chevrolet, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, Each

Part Number: ARP-234-2503

4.95 out of 5 stars ( 178 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Small Block, Each

Part Number: ARP-134-2501

4.77 out of 5 stars ( 95 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Ford, V8, Except 351C, Each

Part Number: ARP-150-2501

4.82 out of 5 stars ( 79 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Big Block, Each

Part Number: ARP-135-2501

4.91 out of 5 stars ( 35 )

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Bolt, Harmonic Balancer, 12-Point, 2.20 in. Length, Mopar, Big Block, V10, Each

Part Number: ARP-2402501

4.63 out of 5 stars ( 16 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Big Block, Each

Part Number: ARP-235-2501

4.77 out of 5 stars ( 13 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Square Drive, Ford, V8, Each

Part Number: ARP-150-2503

4.8 out of 5 stars ( 49 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Ford, 5.0L, Modular V8, Coyote Engine, Each

Part Number: ARP-156-2502

4.5 out of 5 stars ( 2 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Ford, 4.6L, 5.4L, V8, Each

Part Number: ARP-156-2501

5.0 out of 5 stars ( 19 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Small Block, Each

Part Number: ARP-234-2502

5.0 out of 5 stars ( 10 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Big Block, Each

Part Number: ARP-235-2502

4.6 out of 5 stars ( 5 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Hex Head, Oldsmobile, 260-455 V8, Each

Part Number: ARP-180-2501

5.0 out of 5 stars ( 9 )

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Balancer Bolt, 14mm x 1.50, Ford, 2.0L, Each

Part Number: ARP-251-2501

Not Yet Reviewed

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chrysler, KB 426, Hemi, Each

Part Number: ARP-245-2501

5.0 out of 5 stars ( 3 )

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Balancer Bolt, Chromoly, Black Oxide, 12- Point, Each

Part Number: ARP-129-2503

5.0 out of 5 stars ( 2 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Pontiac, V8, Each

Part Number: ARP-190-2501

4.91 out of 5 stars ( 11 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Square Drive, Chevy, Small Block, Each

Part Number: ARP-134-2503

5.0 out of 5 stars ( 8 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chevy, Small Block, Each

Part Number: ARP-234-2501

4.61 out of 5 stars ( 31 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, External 12-Point, Ford, 351C, Each

Part Number: ARP-154-2501

4.86 out of 5 stars ( 7 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Square Drive, Chevy, Big Block, Each

Part Number: ARP-135-2503

5.0 out of 5 stars ( 4 )

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for use on Honda® B16/B18 balancer bolt kit

Part Number: ARP-208-2501

5.0 out of 5 stars ( 3 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, Buick V8, GM V6, Each

Part Number: ARP-120-2501

5.0 out of 5 stars ( 2 )

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Harmonic Balancer Bolts, 12-point Head, 8740 Chromoly, Black Oxide, 3.500 in. Underhead Length, for Nissan, 2.6L RB26, Each

Part Number: ARP-102-2501

3.67 out of 5 stars ( 3 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Square Drive, Chrysler, 426 Hemi, Each

Part Number: ARP-145-2503

5.0 out of 5 stars ( 3 )

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Harmonic Balancer Bolt, Chromoly, Black Oxide, Square Drive, Pontiac V8, Each

Part Number: ARP-190-2502

5.0 out of 5 stars ( 1 )

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