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...

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

Part Groups

Results 1 - 25 of 200

ARP Balancer Bolts 234-2503

ARP Balancer Bolts 234-2503

Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, 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 ( 173 )

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Summit Racing™ Harmonic Balancer Bolts SUM-G1677

Harmonic Balancer Bolt, Steel, Gold Iridite, External Hex, Chevy, Small Block, Each

Part Number: SUM-G1677

4.18 out of 5 stars ( 79 )

Estimated Ship Date: Today

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ARP Balancer Bolts 134-2501

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

Part Number: ARP-134-2501

4.76 out of 5 stars ( 93 )

Estimated Ship Date: Today

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ARP Balancer Bolts 135-2501

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

Part Number: ARP-135-2501

4.91 out of 5 stars ( 34 )

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ARP Balancer Bolts 234-2504

Balancer Bolt, Chromoly, Black Oxide, Chevrolet, Each

Part Number: ARP-234-2504

4.67 out of 5 stars ( 9 )

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ARP Balancer Bolts 150-2501

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

Part Number: ARP-150-2501

4.83 out of 5 stars ( 75 )

Estimated Ship Date: Jun 26, 2025 if ordered today

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Estimated Ship Date: Jun 26, 2025 if ordered today

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Summit Racing™ Harmonic Balancer Bolts SUM-910259

5 out of 5 stars ( 3 )

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Summit Racing™ Harmonic Balancer Bolts SUM-910257

Harmonic Balancer Bolt, Chromoly, Black Oxide, 12-Point, All Gen. 3/4 Chevy, 4.8, 5.3, 6.0L, 6.2L, 7.0L LS1, LS6, Each

Part Number: SUM-910257

5.0 out of 5 stars ( 2 )

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ARP Balancer Bolts 150-2503

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

Part Number: ARP-150-2503

4.79 out of 5 stars ( 48 )

Estimated Ship Date: Today

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Summit Racing™ Harmonic Balancer Bolts SUM-G1678

Harmonic Balancer Bolt, Steel, Gold Iridited, External Hex, Chevy, Big Block, Each

Part Number: SUM-G1678

4.35 out of 5 stars ( 20 )

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ACDelco GM Genuine Parts Harmonic Balancer Fastener Bolts 12557840

Harmonic Balancer Bolt, Steel, Flanged Hex, Coarse Thread, Natural, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Each

Part Number: ADO-12557840

5.0 out of 5 stars ( 1 )

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ARP Balancer Bolts 235-2501

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

Part Number: ARP-235-2501

4.77 out of 5 stars ( 13 )

Estimated Ship Date: Today

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ARP Balancer Bolts 147-2501

Balancer Bolt, Chromoly, Black Oxide, 12-Point, Chrysler, Dodge, 5.7, 6.1, 6.4L, Each

Part Number: ARP-147-2501

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

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ARP Balancer Bolts 240-2501

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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ARP Balancer Bolts 156-2502

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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ARP Balancer Bolts 156-2501

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 ( 18 )

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PRW Harmonic Damper Bolts 1042289

Harmonic Balancer Bolt,Ford, 289-460 (except 351C), 12-point, 5/8 in. Wrenching, 180,000 psi, 5/8 in. x 18 x 2.050 in. UHL, Incl Washer

Part Number: PQX-1042289

Not Yet Reviewed

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ACDelco GM Genuine Parts Harmonic Balancer Fastener Bolts 11547372

Harmonic Balancer Bolts, GM Genuine Parts, M16 x 2.0 Thread Size, Flanged Hex Head, Steel, 4.055 in. Underhead Length, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-11547372

Not Yet Reviewed

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Summit Racing™ Harmonic Balancer Bolts SUM-910310

Harmonic Balancer Bolts, Harmonic Balancer Bolt Kits, External Hex Head, 3/4 in.-16 Thread, Steel, Black Oxide, Chrysler, Dodge, Plymouth, V8, Each

Part Number: SUM-910310

5.0 out of 5 stars ( 2 )

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ATI Harmonic Damper Hardware ATI950234

Harmonic Balancer Bolt, Hex, 5/8-18 in. RH Thread, Chromoly, Black Oxide, Washer, Ford, Each

Part Number: ATI-950234

4.34 out of 5 stars ( 29 )

Estimated Ship Date: Today

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Moroso Balancer Bolts 38770

Harmonic Balancer Bolt, Chromoly, Black Oxide, External Hex, Chevy, Small Block, Each

Part Number: MOR-38770

4.48 out of 5 stars ( 23 )

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PRW Harmonic Damper Bolts 1042346

Harmonic Balancer Bolt, 12-Point, Chromoly, 16mm x 2.0 Thread Size, Chevy, Small Block LS, Each

Part Number: PQX-1042346

5.0 out of 5 stars ( 5 )

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Fluidampr Harmonic Balancer Installation Kits 300007

Installation Kit, Harmonic Balancer, 8740 Chromoly, Black Oxide, Up To 700HP/1,250 lb-ft Torque, Cummins, Kit

Part Number: FLU-300007

5.0 out of 5 stars ( 1 )

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Mr. Gasket Harmonic Balancer Bolt Kits 945G

Harmonic Balancer Bolt, Steel, Gold Iridite, Hex, Chevy, Small Block, Each

Part Number: MRG-945G

4.5 out of 5 stars ( 2 )

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ARP Balancer Bolts 234-2501

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

Part Number: ARP-234-2501

4.6 out of 5 stars ( 30 )

Estimated Ship Date: Jun 26, 2025 if ordered today

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PRW Harmonic Damper Bolts 1042265

5 out of 5 stars ( 1 )

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ATI Harmonic Balancer Bolt Kits ATI950200

Damper Crank Bolts All Except Chrysler & Ford OEM Front

Part Number: ATI-950200

4.6 out of 5 stars ( 5 )

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