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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KRC Pulley Idler / Tensioner w/Stud and Bolt KRC 40406000
KRC POWER STEERING
$115.45A worn or inadequate belt tensioner directly impacts serpentine belt longevity and the reliability of your entire accessory drive system. The KRC Pulley Idler / Tensioner maintains consistent belt tension under high RPM and boost conditions, preventing...KRC40406000- SKU:
- KRC40406000
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MFG Part #:
- KRC 40406000
$115.45 -
KRC P/S Pump Pulley 6in V-Belt Press On KRC 40161600
KRC POWER STEERING
$115.45If you're running a high-performance power steering system, the pulley is a critical component that directly affects belt tension, accessory drive reliability, and overall system efficiency. This KRC 6-inch V-belt pulley is engineered for precision...KRC40161600- SKU:
- KRC40161600
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- MFG Part #:
- KRC 40161600
$115.45 -
KRC P/S Pump Pulley 6in Serpentine Press On KRC 40160600
KRC POWER STEERING
$110.63If you're running a serpentine belt system on your race engine or street machine, your power steering pulley needs to be as reliable as every other component under the hood. The KRC P/S Pump Pulley delivers lightweight, precision engineering that ensures...KRC40160600- SKU:
- KRC40160600
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MFG Part #:
- KRC 40160600
$110.63 -
KRC Alt Pulley 1.75in 3-Rib Denso KRC 40130340
KRC POWER STEERING
$34.86A worn or damaged alternator pulley compromises your charging system's efficiency and can lead to belt slippage, reduced electrical output, and premature component failure. This KRC replacement pulley restores proper serpentine belt drive geometry and...KRC40130340- SKU:
- KRC40130340
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MFG Part #:
- KRC 40130340
$34.86 -
KRC SBC 3-Bolt Crank Adpt. Spacer .500in KRC 38815500
KRC POWER STEERING
$51.70The KRC SBC 3-Bolt Crank Adapter Spacer is essential for precision pulley alignment in your small-block Chevy engine, especially when running serpentine belt systems or upgrading your accessory drive. This 0.500-inch spacer ensures proper crank mandrel...KRC38815500- SKU:
- KRC38815500
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- MFG Part #:
- KRC 38815500
$51.70Qty in Cart: 0Quantity:Price:$51.70Subtotal: -
KRC Serpentine Crank Pulley 3.5in R-Lok KRC 38235000
KRC POWER STEERING
$70.95The KRC Serpentine Crank Pulley is engineered for serious racers and high-performance builds that demand reliable belt drive efficiency and minimal rotational mass. Its compact 3.5-inch diameter and lightweight aluminum construction reduce parasitic drag...KRC38235000- SKU:
- KRC38235000
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MFG Part #:
- KRC 38235000
$70.95 -
KRC R-Lok to R-Lok Spacer .575in KRC 38215575
KRC POWER STEERING
$33.66Precise crankshaft pulley alignment is critical for maintaining belt tension and preventing premature wear on your serpentine system. This KRC R-Lok spacer delivers exact positioning in high-performance and forced-induction applications where factory...KRC38215575- SKU:
- KRC38215575
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KRC 38215575
$33.66 -
KRC R-Lok to R-Lok Spacer .250in KRC 38215250
KRC POWER STEERING
$32.47If you're running a KRC R-Lok pulley drive system on your Chevy V8, proper crank mandrel spacing is critical for maintaining belt alignment and preventing premature wear. This .250-inch aluminum spacer ensures precise positioning between R-Lok pulleys,...KRC38215250- SKU:
- KRC38215250
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KRC 38215250
$32.47 -
KRC Water Pump Pulley 4in KRC38025400
KRC POWER STEERING
$92.60A properly sized water pump pulley is critical for maintaining optimal coolant circulation and engine temperature stability under sustained load. This KRC 4-inch pulley delivers reliable serpentine belt drive compatibility while the lightweight aluminum...KRC38025400- SKU:
- KRC38025400
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- MFG Part #:
- KRC 38025400
$92.60 -
KRC Pro Series Serpentine Pulley Kit 30% w/Idler KRC 37453000
KRC POWER STEERING
$463.00A quality serpentine pulley system is fundamental to reliable engine accessory drive performance, especially in high-output or forced induction applications where standard pulleys can slip or wear prematurely. The KRC Pro Series delivers a 30% underdrive...KRC37453000- SKU:
- KRC37453000
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- MFG Part #:
- KRC 37453000
$463.00 -
KRC Pro Series Serpentine Pulley Kit 1:1 w/Idler KRC 37451000
KRC POWER STEERING
$511.10Direct-drive serpentine pulley systems deliver more accurate accessory belt ratios and eliminate slippage, giving you consistent power delivery and precise control over your Small Block Chevy's auxiliary systems. The 1:1 ratio ensures your water pump,...KRC37451000- SKU:
- KRC37451000
- Availability:
- Ships Same Business Day
- Weight:
- 5.23 LBS
- MFG Part #:
- KRC 37451000
$511.10Qty in Cart: 0Quantity:Price:$511.10Subtotal: -
KRC Serpentine Pulley Kit Pro Series SBC KRC 36403000
KRC POWER STEERING
$240.52A serpentine pulley system is critical for maximizing accessory drive efficiency and eliminating belt slip under sustained boost or high RPM conditions. The KRC Pro Series delivers precision-engineered billet construction that resists deflection while...KRC36403000- SKU:
- KRC36403000
- Availability:
- Ships Same Business Day
- Weight:
- 2.27 LBS
- MFG Part #:
- KRC 36403000
$240.52 -
KRC Pro Series Serpentine Pulley Kit 15% KRC 36401500
KRC POWER STEERING
$240.52The KRC Pro Series Serpentine Pulley Kit delivers a 15% reduction in pulley diameter, increasing belt speed and improving accessory drive efficiency on your Small Block Chevy engine. This translates to better alternator charging, enhanced water pump...KRC36401500- SKU:
- KRC36401500
- Availability:
- Ships Same Business Day
- Weight:
- 2.36 LBS
- MFG Part #:
- KRC 36401500
$240.52 -
KRC Serpentine Pulley Kit w/SBC Head Mount KRC 36351500
KRC POWER STEERING
$228.48A serpentine pulley kit is essential for any Small Block Chevy build seeking reliable accessory drive efficiency and a clean engine bay aesthetic. The KRC head-mount design eliminates complications with traditional bracket systems, while billet aluminum...KRC36351500- SKU:
- KRC36351500
- Availability:
- Ships Same Business Day
- Weight:
- 2.26 LBS
- MFG Part #:
- KRC 36351500
$228.48Qty in Cart: 0Quantity:Price:$228.48Subtotal: -
KRC 6.0in 6-Rib Pulley Alum P/S Pump KRC 20017600
KRC POWER STEERING
$116.64If you're running a serpentine belt system on a high-performance engine, your power steering pulley needs to match the precision and durability of every other component under the hood. The KRC 6.0in 6-Rib Pulley delivers reliable belt tracking and smooth...KRC20017600- SKU:
- KRC20017600
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MFG Part #:
- KRC 20017600
$116.64 -
KRC 4.2in 3-Rib Alum. P/S Pump Pulley KRC 20015300
KRC POWER STEERING
$92.60If you're running a high-performance serpentine drive system, your power steering pulley needs to be as reliable as every other component on your engine. This KRC 4.2-inch aluminum pulley delivers consistent belt engagement and minimal deflection under...KRC20015300- SKU:
- KRC20015300
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MFG Part #:
- KRC 20015300
$92.60 -
KRC V-Belt Pulley 6.0in for KRC Alum. Pumps KRC 20011000
KRC POWER STEERING
$115.45If you're running a KRC aluminum power steering pump, this pulley is your direct bolt-on replacement for maintaining consistent belt drive and steering response under sustained load. The 6.0-inch diameter and single-groove design are engineered to match...KRC20011000- SKU:
- KRC20011000
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- MFG Part #:
- KRC 20011000
$115.45Qty in Cart: 0Quantity:Price:$115.45Subtotal: -
Crankcase Vent 9/16in. Fln. KNE62-2480
K AND N ENGINEERING
$36.99A properly functioning crankcase vent system is essential for maintaining engine health and preventing pressure buildup that can compromise seals and gaskets. This K&N crankcase breather combines reliable performance with a compact clamp-on design that...KNE62-2480- SKU:
- KNE62-2480
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MFG Part #:
- 62-2480
$36.99 -
Breather Vent KNE62-2470
K AND N ENGINEERING
$31.99Crankcase pressure buildup degrades engine seals, gaskets, and overall reliability—this K&N breather vent effectively routes vapors away while maintaining system integrity. The clamp-on design offers straightforward installation without modifications,...KNE62-2470- SKU:
- KNE62-2470
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MFG Part #:
- 62-2470
$31.99 -
3/4inFLG x 1-3/8inOD x 1-1/8inH Vent Filter KNE62-1560
K AND N ENGINEERING
$36.99A quality breather filter is essential for controlling crankcase vapors and protecting your engine from contamination. This K&N vent filter delivers reliable filtration in a compact, bolt-on design that fits 3/4-inch hose connections—making it an ideal...KNE62-1560- SKU:
- KNE62-1560
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- 62-1560
$36.99Qty in Cart: 0Quantity:Price:$36.99Subtotal:
