Engines and Components
Circle Track Engine Parts: Camshafts, Blocks & Accessories for Late Models at JJ Motorsports
Power up your circle track engine with premium components from JJ Motorsports. Our selection includes serpentine drive kits, pulley systems, valve covers, engine blocks, camshafts, and more for maximum horsepower, durability, and performance in late models, modifieds, street stocks, and IMCA dirt racing. Compatible with Small Block Chevy (SBC), LS-series, and other racing engines, these high-quality parts ensure reliable operation under intense track conditions.
Shop trusted brands like Jones Racing, Allstar Performance, Chevrolet Performance, and Howards Racing Components. Explore related categories such as circle track drivetrain for transmission upgrades or circle track chassis components for frame enhancements.
Top Circle Track Engine Products
- Jones Racing Serpentine Drive Kit 1020-S – New serpentine drive kit designed for efficient accessory drive in racing engines, weighing 3.61 lbs for lightweight performance.
- Allstar Performance 1:1 Pulley Kit Head Mount PS ALL31082 – Billet aluminum polished pulley kit with 1:1 ratio and 2-groove V-belt, includes crank and water pump pulleys and belts for Small Block Chevy engines with head-mount power steering.
- Allstar Performance Valve Covers SBC Steel Black w/Tubes ALL26147 – Durable steel valve covers in black finish with tubes, designed for Small Block Chevy engines, weighing 5.95 lbs for reliable sealing and style.
- Chevrolet Performance LSX Cast Iron Block - 4.065 Bore Finished 19417352 – Bare cast iron engine block with 4.065 in bore, 9.240 deck height, 6-bolt mains and heads, orange powdercoat finish, compatible with Gen III/IV LS components, supporting up to 4.250 in stroke and 454 cu. in. displacement.
- SBC Solid Roller Cam 111013-10 – High-performance solid roller camshaft from Howards Racing Components for Small Block Chevy engines, weighing 8.70 lbs, ideal for aggressive racing applications.
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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SBC 4340 Forged Crank - 3.500 Stroke 4-400-3500-6000
SCAT ENTERPRISES
$959.99A forged crankshaft is the foundation of any reliable high-performance small block build. The SBC 4340 delivers the durability needed for sustained high-RPM operation, while the 3.500" stroke provides a proven geometry for balanced power delivery across...SCA4-400-3500-6000- SKU:
- SCA4-400-3500-6000
- Availability:
- Ships Same Business Day
- Weight:
- 59.00 LBS
- MFG Part #:
- 4-400-3500-6000
$959.99 -
SBC 4340 Forged Crank - 4.000 Stroke 4-350-4000-6000
SCAT ENTERPRISES
$984.99A forged 4340 steel crankshaft is the foundation of any high-revving Small Block Chevy engine that demands reliability under sustained load. This internally balanced unit eliminates the need for external counterweights, simplifying installation and...SCA4-350-4000-6000- SKU:
- SCA4-350-4000-6000
- Availability:
- Ships Same Business Day
- Weight:
- 57.30 LBS
- MFG Part #:
- 4-350-4000-6000
$984.99 -
SBC L/W 4340 Forged Crank - 3.875 Stroke 4-350-3875-6000-2
SCAT ENTERPRISES
$2,299.99A forged 4340 crankshaft is the foundation of any high-RPM small block build. If you're pushing your SBC past 6,000 RPM or building a forced-induction engine, a lightweight forged crank eliminates rotating mass and dramatically improves throttle response...SCA4-350-3875-6000-2- SKU:
- SCA4-350-3875-6000-2
- Availability:
- Ships Same Business Day
- Weight:
- 48.00 LBS
- MFG Part #:
- 4-350-3875-6000-2
$2,299.99 -
SBC L/W 4340 Forged Crank - 3.750 Stroke 4-350-3750-6000-2
SCAT ENTERPRISES
$2,654.99A forged 4340 crankshaft is essential for any serious small-block Chevy build pushing high RPM or forced induction. The Pro Comp lightweight design reduces rotational mass, improving throttle response and allowing your engine to rev faster while...SCA4-350-3750-6000-2- SKU:
- SCA4-350-3750-6000-2
- Availability:
- Ships Same Business Day
- Weight:
- 52.05 LBS
- MFG Part #:
- 4-350-3750-6000-2
$2,654.99Qty in Cart: 0Quantity:Price:$2,654.99Subtotal: -
SBC 4340 Forged Crank - 3.750 Stroke 4-350-3750-6000
SCAT ENTERPRISES
$944.99A quality crankshaft is the foundation of engine reliability and power delivery—especially in high-revving Small Block Chevy applications where precision matters. This 4340 forged crank delivers the stroke length and internal balance needed to unlock...SCA4-350-3750-6000- SKU:
- SCA4-350-3750-6000
- Availability:
- Ships Same Business Day
- Weight:
- 57.00 LBS
- MFG Part #:
- 4-350-3750-6000
$944.99 -
SBC 4340 Forged Crank - 3.750 Stroke 4-350-3750-5700-L
SCAT ENTERPRISES
$944.99A forged crankshaft is the backbone of any high-revving Small Block Chevy engine build—it handles the violent reciprocating forces that cast cranks simply cannot tolerate. This 4340 forged unit delivers the strength and reliability required for serious...SCA4-350-3750-5700-L- SKU:
- SCA4-350-3750-5700-L
- Availability:
- Ships Same Business Day
- Weight:
- 56.60 LBS
- MFG Part #:
- 4-350-3750-5700-L
$944.99 -
SBC 4340 Forged Crank - 3.750 Stroke 4-350-3750-5700
SCAT ENTERPRISES
$944.99A quality crankshaft is the backbone of any high-performance Small Block Chevy build—it's the component that directly translates combustion pressure into usable horsepower and torque. This 4340 forged crank delivers the stroke length and internal balance...SCA4-350-3750-5700- SKU:
- SCA4-350-3750-5700
- Availability:
- Ships Same Business Day
- Weight:
- 61.00 LBS
- MFG Part #:
- 4-350-3750-5700
$944.99 -
SBC F-43 Forged Crank - 3.500 Stroke 4-350-3500-5700-21LW
SCAT ENTERPRISES
$1,279.99If you're building a small block Chevy engine that needs to handle sustained RPM and load cycles, a quality forged crankshaft is non-negotiable. The SBC F-43 delivers the strength and balance required for reliable performance, whether you're prepping for...SCA4-350-3500-5700-21LW- SKU:
- SCA4-350-3500-5700-21LW
- Availability:
- Ships Same Business Day
- Weight:
- 47.10 LBS
- MFG Part #:
- 4-350-3500-5700-21LW
$1,279.99Qty in Cart: 0Quantity:Price:$1,279.99Subtotal: -
SBC F-43 Forged Crank - 3.500 Stroke 4-350-3500-5700-18LW
SCAT ENTERPRISES
$1,279.99If you're building or rebuilding a small block Chevy engine for serious performance, your crankshaft is non-negotiable—it's the backbone of your bottom end. The SBC F-43 Forged Crank delivers the stroke geometry and internal balance you need for reliable...SCA4-350-3500-5700-18LW- SKU:
- SCA4-350-3500-5700-18LW
- Availability:
- Ships Same Business Day
- Weight:
- 45.25 LBS
- MFG Part #:
- 4-350-3500-5700-18LW
$1,279.99 -
SBC F-43 Forged Crank - 3.480 Stroke 4-350-3480-5700-21LW
SCAT ENTERPRISES
$1,279.99A quality forged crankshaft is the backbone of any high-performance Small Block Chevy build—it directly impacts power delivery, engine longevity, and reliability under boost or high RPM stress. The SBC F-43 combines premium forged steel construction with...SCA4-350-3480-5700-21LW- SKU:
- SCA4-350-3480-5700-21LW
- Availability:
- Ships Same Business Day
- Weight:
- 47.30 LBS
- MFG Part #:
- 4-350-3480-5700-21LW
$1,279.99 -
SBC F-43 Forged Crank - 3.480 Stroke 4-350-3480-5700-20LW
SCAT ENTERPRISES
$1,279.99A quality crankshaft is the backbone of reliable high-RPM performance—and the SBC F-43 Forged Crank delivers the strength and precision needed for serious Small Block builds. Whether you're pushing higher boost levels, extending your rev range, or simply...SCA4-350-3480-5700-20LW- SKU:
- SCA4-350-3480-5700-20LW
- Availability:
- Ships Same Business Day
- Weight:
- 46.15 LBS
- MFG Part #:
- 4-350-3480-5700-20LW
$1,279.99 -
SBC F-43 Forged Crank - 3.480 Stroke 4-350-3480-5700-18LW
SCAT ENTERPRISES
$1,285.99If you're building or rebuilding a Small Block Chevy engine for serious performance, your crankshaft is the foundation of reliability and power delivery. The SBC F-43 Forged Crank delivers the stroke length and internal balance needed for consistent,...SCA4-350-3480-5700-18LW- SKU:
- SCA4-350-3480-5700-18LW
- Availability:
- Ships Same Business Day
- Weight:
- 44.55 LBS
- MFG Part #:
- 4-350-3480-5700-18LW
$1,285.99 -
SBC 4340 Forged Crank - 3.480 Stroke 4-350-3480-5700
SCAT ENTERPRISES
$944.99A forged 4340 crankshaft is essential for any serious Small Block Chevy build pushing toward high RPM and sustained power. This 3.480-stroke unit provides the internal balance and material strength needed for forced induction, nitrous, or naturally...SCA4-350-3480-5700- SKU:
- SCA4-350-3480-5700
- Availability:
- Ships Same Business Day
- Weight:
- 55.30 LBS
- MFG Part #:
- 4-350-3480-5700
$944.99Qty in Cart: 0Quantity:Price:$944.99Subtotal: -
SBF 4340 Forged Crank - 3.400 Stroke 4-302-3400-54-2123-I
SCAT ENTERPRISES
$675.99A forged steel crankshaft is the foundation of any reliable, high-revving engine build. The SBF 4340 Forged Crank delivers the strength and precision needed for sustained performance in Small Block Ford engines, whether you're pushing higher RPMs on the...SCA4-302-3400-54-2123-I- SKU:
- SCA4-302-3400-54-2123-I
- Availability:
- Ships Same Business Day
- Weight:
- 52.55 LBS
- MFG Part #:
- 4-302-3400-54-2123-I
$675.99Qty in Cart: 0Quantity:Price:$675.99Subtotal: -
SBF 4340 Forged Crank - 3.400 Stroke 4-302-3400-5400-2123
SCAT ENTERPRISES
$908.99A quality forged crankshaft is the foundation of any reliable high-performance Small Block Ford engine. This 4340 forged crank delivers the strength and precision needed to handle aggressive power levels while maintaining the durability required for...SCA4-302-3400-5400-2123- SKU:
- SCA4-302-3400-5400-2123
- Availability:
- Ships Same Business Day
- Weight:
- 51.30 LBS
- MFG Part #:
- 4-302-3400-5400-2123
$908.99Qty in Cart: 0Quantity:Price:$908.99Subtotal: -
SBF 4340 Forged Crank - 3.250 Stroke 4-302-3250-5400-2123
SCAT ENTERPRISES
$923.99A forged 4340 crankshaft is the foundation of a reliable, high-RPM engine build. Whether you're assembling a street performance SBF or a track-focused small block, this externally balanced crank delivers the durability needed to handle aggressive power...SCA4-302-3250-5400-2123- SKU:
- SCA4-302-3250-5400-2123
- Availability:
- Ships Same Business Day
- Weight:
- 50.30 LBS
- MFG Part #:
- 4-302-3250-5400-2123
$923.99Qty in Cart: 0Quantity:Price:$923.99Subtotal: -
SBC 4340 Forged I-Beam Rods 6.000 3-ICR6000
SCAT ENTERPRISES
$469.99If you're building or rebuilding a Small Block Chevy engine destined for serious power, OEM connecting rods simply won't cut it. These 4340 forged I-beam rods deliver the strength and reliability needed to handle high RPM loads and boost pressure without...SCA3-ICR6000- SKU:
- SCA3-ICR6000
- Availability:
- Ships Same Business Day
- Weight:
- 12.06 LBS
- MFG Part #:
- 3-ICR6000
$469.99Qty in Cart: 0Quantity:Price:$469.99Subtotal: -
SBC 4340 Forged I-Beam Rods 5.700 3-ICR5700P
SCAT ENTERPRISES
$411.99Stock connecting rods are a common failure point under sustained RPM and boost, especially in street-driven or lightly modified small blocks that see occasional high-load conditions. These 4340 forged I-beam rods deliver the durability needed to reliably...SCA3-ICR5700P- SKU:
- SCA3-ICR5700P
- Availability:
- Ships Same Business Day
- Weight:
- 11.81 LBS
- MFG Part #:
- 3-ICR5700P
$411.99 -
SBC 4340 Forged I-Beam Rods 6.000 2-ICR6000-7/16
SCAT ENTERPRISES
$498.99If you're building or rebuilding a Small Block Chevy engine for sustained high RPM operation, connecting rod quality directly impacts reliability and longevity under load. Pro Comp's 4340 forged I-beam rods deliver the strength-to-weight ratio necessary...SCA2-ICR6000-7/16- SKU:
- SCA2-ICR6000-7/16
- Availability:
- Ships Same Business Day
- Weight:
- 11.52 LBS
- MFG Part #:
- 2-ICR6000-7/16
$498.99 -
SBC 4340 Forged I-Beam Rods 6.000 w/ARP Bolts 2-ICR6000-2000-7/16
SCAT ENTERPRISES
$552.99A high-performance engine demands connecting rods built to handle extreme cylinder pressures and sustained RPM loads without failure. These 4340 forged I-beam rods deliver the strength and reliability required for forced induction, nitrous applications,...SCA2-ICR6000-2000-7/16- SKU:
- SCA2-ICR6000-2000-7/16
- Availability:
- Ships Same Business Day
- Weight:
- 12.35 LBS
- MFG Part #:
- 2-ICR6000-2000-7/16
$552.99
