Harmonic Balancers
Circle Track Harmonic Balancers at JJ Motorsports
Reduce crankshaft vibrations and protect your engine from excessive wear with high-performance harmonic balancers from JJ Motorsports. Designed for demanding circle track racing, these balancers ensure smooth operation and longevity under high-RPM conditions, ideal for IMCA, USMTS, late models, modifieds, and street stocks, available in SFI-certified options for internal and external balance on SBC, SBF, and GM LS engines.
Shop trusted brands like Pioneer for SFI-rated dampers, KRC Power Steering for R-Lok adapters, and Blueprint Engines for external balance balancers. Explore related categories such as Harmonic Balancers and Components for additional parts or Crankshafts and Components for engine upgrades.
Top Circle Track Harmonic Balancers
- Harmonic Damper SFI SBF 302/351W Int. Balance 872034 – Harmonic Balancer 6.370 in OD Steel Internal Balance Ford Small Block.
- KRC Adapter Pro R-Lok SBC KRC 38140500 – Crankshaft Hub R-Lok 1.245 in Long Hardware Included Black Anodized Each.
- SBC Balancer 8in OD 400 External Balance BPP400L – Harmonic Balancer 8.000 in OD Steel Black Zinc External Balance Each.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Harmonic Damper SFI SBF 302/351W Int. Balance 872034
PIONEER
$405.99A harmonic damper is essential for protecting your small block Ford from destructive crankshaft vibrations that accumulate at high RPM. Without proper damping, these oscillations can lead to premature bearing wear, crankshaft failure, and catastrophic...PIO872034- SKU:
- PIO872034
- Availability:
- Ships Same Business Day
- Weight:
- 9.20 LBS
$405.99 -
KRC Adapter Pro R-Lok SBC KRC 38140500
KRC POWER STEERING
$132.27If you're running a serpentine belt system or accessory drive on your small-block Chevy, hub adapter quality directly impacts reliability under boost and high RPM loads. The KRC Adapter Pro R-Lok delivers a precision crankshaft interface with dependable...KRC38140500- SKU:
- KRC38140500
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$132.27 -
SBC Balancer 8in OD 400 External Balance BPP400L
BLUEPRINT ENGINES
$159.99A harmonic balancer is critical to small-block Chevy longevity—it absorbs dangerous vibrations that can crack your crankshaft and destroy bearings over time. This 8-inch external balance unit is engineered for 400 cubic inch engines and delivers the...BPEBPP400L- SKU:
- BPEBPP400L
- Availability:
- Ships Same Business Day
- Weight:
- 14.00 LBS
$159.99 -
ATI SBC 6.325 SFI Harmonic Damper Internal Balance 917781U
ATI PERFORMANCE
$357.99Harmonic vibration at the crankshaft can quickly wear bearings, degrade seals, and compromise engine longevity—especially in high-revving applications. The ATI SBC 6.325 SFI Harmonic Damper eliminates these destructive vibrations with precision internal...ATI917781U- SKU:
- ATI917781U
- Availability:
- Ships Same Business Day
- Weight:
- 9.35 LBS
$357.99 -
ATI 7.074 Harmonic Damper SFI GM LS1 3-Ring 917777
ATI PERFORMANCE
$383.99The ATI 7.074 Harmonic Damper is engineered to eliminate destructive crankshaft vibration in high-rpm LS1 applications, protecting your engine from premature wear and catastrophic failure. By absorbing harmonic frequencies before they compromise your...ATI917777- SKU:
- ATI917777
- Availability:
- Ships Same Business Day
- Weight:
- 12.05 LBS
$383.99 -
Damper - SBF 289-351W 28oz External Balance TFS-19006
TRICK FLOW
$259.99If you're running an externally balanced Small Block Ford engine, your factory damper won't cut it on the track. The TFS-19006 is purpose-built to handle high-RPM loads and vibration damping with SFI 18.1 certification, ensuring reliable performance...TRFTFS-19006- SKU:
- TRFTFS-19006
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
$259.99 -
Quarter Master Crank Hub Assy SBC Ford 180331
QUARTER MASTER
$272.41A precision crankshaft hub is critical for reliable power transmission between your harmonic balancer and engine in high-rpm applications. Quarter Master's 180331 delivers the exact fitment and durability small block Ford builders demand, eliminating the...QTR180331- SKU:
- QTR180331
- Availability:
- Ships Same Business Day
- Weight:
- 1.83 LBS
$272.41 -
SBF 6.61in Balancer 28oz Ext. Balance - SFI 34269
PRO-RACE PERFORMANCE PRODUCTS
$221.99A harmonic balancer is critical to small block Ford engine reliability—it absorbs crankshaft vibration that can cause premature bearing wear, timing chain stretch, and component failure at high RPM. The SBF 6.61in Balancer delivers the precision...PRH34269- SKU:
- PRH34269
- Availability:
- Ships Same Business Day
- Weight:
- 12.60 LBS
$221.99 -
SBC 6.61in Balancer Ext. Balance - SFI 34266
PRO-RACE PERFORMANCE PRODUCTS
$222.99A quality harmonic balancer is essential for controlling crankshaft vibration and protecting your engine from premature wear and catastrophic failure. This SBC external balance unit is purpose-built for high-performance applications where precision and...PRH34266- SKU:
- PRH34266
- Availability:
- Ships Same Business Day
- Weight:
- 11.40 LBS
$222.99 -
SBC 6.1in Balancer Int. Balance - SFI 34265
PRO-RACE PERFORMANCE PRODUCTS
$218.99A properly balanced harmonic balancer is critical for small block Chevy engines running at high RPM—it reduces destructive vibration, protects your crankshaft from premature wear, and keeps your engine running smooth even under sustained boost or...PRH34265- SKU:
- PRH34265
- Availability:
- Ships Same Business Day
- Weight:
- 10.60 LBS
$218.99 -
SBC 6.61in Balancer Int. Balance - SFI 34262
PRO-RACE PERFORMANCE PRODUCTS
$206.99A properly balanced harmonic balancer is critical for protecting your Small Block Chevy engine from destructive harmonic vibrations that can lead to crank failure and component damage. This SBC balancer delivers the precision internal balance needed for...PRH34262- SKU:
- PRH34262
- Availability:
- Ships Same Business Day
- Weight:
- 10.64 LBS
$206.99 -
GM LS 7.25in Balancer Int. Balance - SFI 34261
PRO-RACE PERFORMANCE PRODUCTS
$279.99Engine balance directly impacts reliability, longevity, and peak performance—especially under the extreme conditions of racing and forced induction builds. A quality harmonic balancer absorbs destructive crankshaft vibrations, reducing wear on main...PRH34261- SKU:
- PRH34261
- Availability:
- Ships Same Business Day
- Weight:
- 13.42 LBS
$279.99 -
GM LS 7.25in Balancer Int. Balance - SFI 34260
PRO-RACE PERFORMANCE PRODUCTS
$252.99A harmonic balancer is critical for GM LS-Series engines running at high RPM—it absorbs destructive vibrations that can crack cranks and compromise reliability under sustained boost or nitrous. This Pro Sport balancer delivers the durability and...PRH34260- SKU:
- PRH34260
- Availability:
- Ships Same Business Day
- Weight:
- 12.95 LBS
$252.99 -
SBC 6.1in Balancer Lwt. Int. Balance - SFI 31262
PRO-RACE PERFORMANCE PRODUCTS
$174.99Harmonic balancers are critical to engine longevity—they absorb crankshaft vibration that would otherwise crack bearings and compromise reliability. This lightweight, internally balanced option is engineered for Small Block Chevy engines that demand...PRH31262- SKU:
- PRH31262
- Availability:
- Ships Same Business Day
- Weight:
- 5.67 LBS
$174.99 -
Crank Adapter Sleeve - GM LS to Early Trans. 1800346
PRW INDUSTRIES, INC.
$23.58Swapping an LS engine into a vehicle with an early transmission demands precision engineering at the crankshaft interface—and this adapter sleeve delivers exactly that. By providing a reliable mechanical bridge between your GM converter and LS crank, you...PQX1800346- SKU:
- PQX1800346
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$23.58 -
Ford Performance Harmonic Damper 302/351W Neutral Balance SFI 18-1 M-6316-D302
FORD
$391.99Harmonic dampers are critical to Small Block Ford reliability—they absorb destructive crankshaft vibrations that can lead to bearing wear, timing chain stretch, and catastrophic engine failure. This Ford Performance damper delivers neutral balance tuning...FRDM6316-D302- SKU:
- FRDM6316-D302
- Availability:
- Ships Same Business Day
- Weight:
- 10.40 LBS
$391.99 -
ATI SBC 7.074 Harmonic Damper - SFI 917783K
ATI PERFORMANCE
$391.99Harmonic vibration at the crankshaft can cause premature bearing wear, fatigue cracking, and catastrophic engine failure—especially in high-RPM racing applications. The ATI SBC 7.074 Super Damper absorbs destructive oscillations, extending engine life...ATI917783K- SKU:
- ATI917783K
- Availability:
- Ships Same Business Day
- Weight:
- 11.50 LBS
$391.99 -
ATI SBF 6.325 Harmonic Damper - SFI 3-Bolt 917511AK
ATI PERFORMANCE
$398.99Harmonic dampers are critical to engine longevity—they absorb crankshaft vibrations that, left unchecked, lead to premature bearing wear and catastrophic failure. The ATI SBF Super Damper delivers proven durability with a precision-engineered elastomer...ATI917511AK- SKU:
- ATI917511AK
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
$398.99 -
ATI GM LS 6.325 Harmonic Damper - SFI 917215
ATI PERFORMANCE
$398.99Engine harmonics are one of the most overlooked factors in high-RPM reliability, and an undersized or worn damper can lead to crankshaft fatigue and catastrophic failure. The ATI GM LS 6.325 Harmonic Damper absorbs destructive torsional vibrations across...ATI917215- SKU:
- ATI917215
- Availability:
- Ships Same Business Day
- Weight:
- 7.30 LBS
$398.99 -
SBC 6.25 Harmonic Balance - SFI 872021
PIONEER
$403.99Harmonic balancers are critical to engine longevity—they absorb destructive crankshaft vibrations that can lead to premature wear, bearing failure, and catastrophic engine damage. This SBC-specific balancer is engineered to eliminate these vibrations...PIO872021- SKU:
- PIO872021
- Availability:
- Ships Same Business Day
- Weight:
- 6.85 LBS
- MFG Part #:
- 872021
$403.99
