Crankshafts
Circle Track Crankshafts at JJ Motorsports
Convert piston motion into reliable rotational power with high-quality crankshafts from JJ Motorsports. Engineered for intense racing conditions, these forged steel cranks deliver exceptional durability and precision for Small Block Chevy, LS, and other engines in late models, modifieds, and street stocks, ensuring optimal torque and horsepower on demanding dirt ovals.
Shop trusted brands like Manley for 4340 forged options, Lunati for Voodoo series, Eagle for balanced cranks, and Scat Enterprises for high-stroke designs. Explore related categories such as Circle Track Crankshafts and Components for balancing plates or Circle Track Engines and Components for complete upgrades.
Top Circle Track Crankshafts
- Manley SBC 4340 Forged Crank 3.480 Stroke/350 mains 190310 – Crankshaft 3.480 in Stroke Internal Balance Forged Steel 2 Piece Seal Small Block Chevy Each.
- Manley SBC 4340 Forged Crank 3.480 Stroke 350 Mains 190310NB – Crankshaft 3.480 in Stroke Internal Balance Forged Steel 2-Piece Seal Each.
- GM LS 4340 Forged Crank 4.000 Stroke 70840001 – Crankshaft Voodoo 4.000 in Stroke Internal Balance Forged Steel GM LS-Series 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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Eagle SBC 4340 Forged Crank - 3.750 Stroke 440037505700
EAGLE
$892.99A quality crankshaft is the backbone of any high-revving Small Block Chevy build. The Eagle SBC 4340 Forged Crank delivers the strength and precision needed to handle sustained high RPM loads without flex or failure, while its optimized 3.750-inch stroke...EAG440037505700- SKU:
- EAG440037505700
- Availability:
- Ships Same Business Day
- Weight:
- 58.70 LBS
- MFG Part #:
- CRS440037505700
$892.99 -
Eagle SBC 4340 Forged Crank - 3.480 Stroke 440034805700
EAGLE
$1,050.99A forged crankshaft is the backbone of any high-performance small block Chevy engine, and the Eagle SBC 4340 delivers the strength and reliability required for sustained boost, extended RPM limits, and aggressive power builds. The 3.480-inch stroke gives...EAG440034805700- SKU:
- EAG440034805700
- Availability:
- Ships Same Business Day
- Weight:
- 56.80 LBS
- MFG Part #:
- CRS440034805700
$1,050.99 -
Eagle SBC 4340 Forged Crank - 3.480 Stroke 435334805700
EAGLE
$931.99A forged crankshaft is the foundation of any reliable, high-RPM Small Block Chevy build. The Eagle SBC 4340 combines superior material strength with precision manufacturing to handle sustained power delivery without risk of catastrophic failure. If...EAG435334805700- SKU:
- EAG435334805700
- Availability:
- Ships Same Business Day
- Weight:
- 56.00 LBS
- MFG Part #:
- CRS435334805700
$931.99Qty in Cart: 0Quantity:Price:$931.99Subtotal: -
Eagle SBF 4340 Forged Crank - 4.000 Stroke 435240006200
EAGLE
$1,075.99A quality crankshaft is the foundation of any reliable high-performance engine build. The Eagle SBF 4340 Forged Crank delivers the stroke geometry and material strength you need to support higher RPMs and sustained power delivery without risking...EAG435240006200- SKU:
- EAG435240006200
- Availability:
- Ships Same Business Day
- Weight:
- 62.25 LBS
- MFG Part #:
- CRS435240006200
$1,075.99 -
Eagle SBF 4340 Forged Crank - 4.000 Stroke 435140006200
EAGLE
$852.99A forged 4340 crankshaft is the foundation of any serious Small Block Ford build that demands reliability under sustained high RPM and boost. This Eagle crank delivers the strength to handle forced induction, nitrous, and aggressive cam profiles without...EAG435140006200- SKU:
- EAG435140006200
- Availability:
- Ships Same Business Day
- Weight:
- 63.65 LBS
- MFG Part #:
- CRS435140006200
$852.99 -
Eagle SBC 4340 Forged Crank - 4.000 Stroke 435040006000
EAGLE
$981.99A stroker crank is the foundation of any serious Small Block Chevy build—and the Eagle SBC 4340 delivers the displacement and durability you need for increased torque and horsepower. The 4.000-inch stroke expands your engine's cubic inches, translating...EAG435040006000- SKU:
- EAG435040006000
- Availability:
- Ships Same Business Day
- Weight:
- 56.65 LBS
- MFG Part #:
- CRS435040006000
$981.99 -
Eagle SBC 4340 Forged Crank - 3.750 Stroke - L/W 4350375057LA
EAGLE
$871.99A forged crankshaft is the backbone of any high-revving Small Block Chevy engine, and the Eagle SBC 4340 delivers the strength and reliability you need to push your power levels without compromise. The lightweight design reduces rotational mass,...EAG4350375057LA- SKU:
- EAG4350375057LA
- Availability:
- Ships Same Business Day
- Weight:
- 53.00 LBS
- MFG Part #:
- CRS4350375057LA
$871.99Qty in Cart: 0Quantity:Price:$871.99Subtotal: -
Eagle SBC 4340 Forged Crank - 3.625 Stroke 435036255700
EAGLE
$870.99Built for serious small block builders who demand reliability under extreme power levels, the Eagle SBC 4340 Forged Crank delivers the strength and precision required for forced induction, nitrous, or high-RPM naturally aspirated applications. The 4340...EAG435036255700- SKU:
- EAG435036255700
- Availability:
- Ships Same Business Day
- Weight:
- 55.90 LBS
- MFG Part #:
- CRS435036255700
$870.99 -
Eagle SBC 4340 Forged Crank - 3.5625 Stroke 435035625700
EAGLE
$859.99Building a reliable high-displacement Small Block Chevy engine demands a crankshaft engineered to handle increased load and RPM stress. The Eagle SBC 4340 Forged Crank delivers the strength and precision needed for forced induction, naturally aspirated...EAG435035625700- SKU:
- EAG435035625700
- Availability:
- Ships Same Business Day
- Weight:
- 45.25 LBS
- MFG Part #:
- CRS435035625700
$859.99 -
Eagle SBC 4340 Forged Crank - 3.500 Stroke 435035005700
EAGLE
$946.99A forged crankshaft is the backbone of any high-output small-block engine, and the Eagle SBC 4340 delivers the strength and precision required for sustained performance whether you're building a street engine or a competition powerplant. The 3.500"...EAG435035005700- SKU:
- EAG435035005700
- Availability:
- Ships Same Business Day
- Weight:
- 55.60 LBS
- MFG Part #:
- CRS435035005700
$946.99 -
Eagle SBC 4340 Forged Crank - 3.480 Stroke 435034805700
EAGLE
$931.99If you're building or rebuilding a Small Block Chevy engine for serious power, the Eagle SBC 4340 Forged Crank is a critical foundation. Forged 4340 steel delivers the strength and fatigue resistance needed for high-RPM sustained performance, while the...EAG435034805700- SKU:
- EAG435034805700
- Availability:
- Ships Same Business Day
- Weight:
- 55.00 LBS
- MFG Part #:
- CRS435034805700
$931.99 -
Eagle GM LS1 4340 Forged Crank - 4.000 Stroke 434640006100
EAGLE
$1,089.99A forged crankshaft is the backbone of any high-performance LS1 engine build, and Eagle's 4340 forged unit delivers the strength and reliability demanded by serious racers and built-engine enthusiasts. This internally balanced design eliminates the need...EAG434640006100- SKU:
- EAG434640006100
- Availability:
- Ships Same Business Day
- Weight:
- 57.90 LBS
- MFG Part #:
- CRS434640006100
$1,089.99 -
Eagle GM LS1 4340 Forged Crank - 3.622 Stroke 434636226100
EAGLE
$1,093.99When you're building a high-displacement LS engine or pushing an existing platform to its limits, your crankshaft must handle extreme loads without compromise. The Eagle GM LS1 4340 Forged Crank delivers the strength and reliability required for serious...EAG434636226100- SKU:
- EAG434636226100
- Availability:
- Ships Same Business Day
- Weight:
- 58.80 LBS
- MFG Part #:
- CRS434636226100
$1,093.99 -
Eagle SBF 4340 Forged Crank - 3.400 Stroke 430234025400
EAGLE
$939.99A forged 4340 steel crankshaft is the foundation of any high-revving, high-horsepower Small Block Ford engine build. The Eagle SBF 4340 delivers the strength and reliability needed to handle aggressive power levels without sacrificing durability, making...EAG430234025400- SKU:
- EAG430234025400
- Availability:
- Ships Same Business Day
- Weight:
- 50.30 LBS
- MFG Part #:
- CRS430234025400
$939.99 -
Eagle SBF 4340 Forged Crank - 3.000 Stroke 430230015090
EAGLE
$812.99A forged 4340 steel crankshaft is the foundation of a reliable, high-RPM Small Block Ford engine build. The Eagle SBF crank delivers the stroke length and internal balance geometry needed to support aggressive power outputs while maintaining durability...EAG430230015090- SKU:
- EAG430230015090
- Availability:
- Ships Same Business Day
- Weight:
- 49.40 LBS
- MFG Part #:
- CRS430230015090
$812.99 -
Eagle SBC Cast Steel Crank - 3.750 Stroke 103523750
EAGLE
$346.99A quality crankshaft is the foundation of any reliable small block Chevy engine build. The Eagle SBC Cast Steel Crank delivers proven durability and precise stroke geometry for street, strip, and track applications without the premium price tag of forged...EAG103523750- SKU:
- EAG103523750
- Availability:
- Ships Same Business Day
- Weight:
- 52.80 LBS
- MFG Part #:
- CRS103523750
$346.99 -
Eagle SBC Cast Steel Crank - 3.480 Stroke 103523480
EAGLE
$335.99The Eagle SBC Cast Steel Crank delivers the stroke you need for increased displacement and torque output in your Small Block Chevy build. Whether you're upgrading from a stock unit or assembling a high-displacement engine, this cast iron crankshaft...EAG103523480- SKU:
- EAG103523480
- Availability:
- Ships Same Business Day
- Weight:
- 52.95 LBS
- MFG Part #:
- CRS103523480
$335.99Qty in Cart: 0Quantity:Price:$335.99Subtotal: -
Eagle SBC Cast Steel Crank - 3.750 Stroke 103503750
EAGLE
$358.99A quality crankshaft is the foundation of any reliable small-block Chevy engine build. The Eagle SBC Cast Steel Crank delivers the stroke length and external balance characteristics you need for consistent power delivery and durability in both street and...EAG103503750- SKU:
- EAG103503750
- Availability:
- Ships Same Business Day
- Weight:
- 52.05 LBS
- MFG Part #:
- CRS103503750
$358.99 -
Eagle SBC Cast Steel Crank - 3.480 Stroke (IMCA) 103503480CM
EAGLE
$403.99For IMCA racers and SBC builders who demand reliability in competition, the Eagle SBC Cast Steel Crank delivers the durability needed to withstand repeated high-RPM cycles without compromise. This internally balanced 3.480-stroke unit is purpose-built...EAG103503480CM- SKU:
- EAG103503480CM
- Availability:
- Ships Same Business Day
- Weight:
- 54.70 LBS
- MFG Part #:
- CRS103503480CM
$403.99 -
Eagle SBC Cast Steel Crank - 3.480 Stroke 103503480
EAGLE
$349.99A quality crankshaft is the foundation of engine reliability and performance—it directly impacts your power delivery, longevity, and how your engine handles sustained RPM loads. The Eagle SBC Cast Steel Crank delivers the durability you need for street...EAG103503480- SKU:
- EAG103503480
- Availability:
- Ships Same Business Day
- Weight:
- 51.55 LBS
- MFG Part #:
- CRS103503480
$349.99
