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Engines and Components

Engines and Components

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

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
  • Pro Tie-Bar Roller Lifter Set SBF .875 Dia KTL-S875760-10

    Pro Tie-Bar Roller Lifter Set SBF .875 Dia KTL-S875760-10

    JESEL

    $2,125.00
    Mechanical roller lifters are essential for high-RPM, high-lift camshaft applications where reliability and consistent valve train geometry matter most. This Pro Tie-Bar Roller Lifter Set delivers the reduced friction and extended component life that...
    JESKTL-S875760-10
    SKU:
    JESKTL-S875760-10
    Availability:
    Ships Same Business Day
    Weight:
    4.82 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $2,125.00
    Subtotal:
  • shaft rocker arm kit sbf 1.6/1.6 ratio kss-516060

    Shaft Rocker Arm Kit SBF 1.6/1.6 Ratio KSS-516060

    JESEL

    $1,535.00
    A quality rocker arm kit is fundamental to consistent valve train performance, especially when running higher RPMs or aggressive cam profiles. The KSS-516060 delivers full roller technology that reduces friction and wear, translating to improved throttle...
    JESKSS-516060
    SKU:
    JESKSS-516060
    Availability:
    Ships Same Business Day
    Weight:
    16.90 LBS
    $1,535.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,535.00
    Subtotal:
  • Shaft Rocker Arm Kit LS3 1.7/1.7 Ratio KSS-467070

    Shaft Rocker Arm Kit LS3 1.7/1.7 Ratio KSS-467070

    JESEL

    $1,690.00
    If you're building or rebuilding an LS3 engine and want reliable valve actuation without compromise, shaft rocker arms deliver consistent geometry and reduced deflection compared to stud-mount designs. This complete 16-piece kit gives you everything...
    JESKSS-467070
    SKU:
    JESKSS-467070
    Availability:
    Ships Same Business Day
    Weight:
    14.70 LBS
    $1,690.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,690.00
    Subtotal:
  • shaft rocker arm kit sbc 1.6/1.6 ratio kss-436060

    Shaft Rocker Arm Kit SBC 1.6/1.6 Ratio KSS-436060

    JESEL

    $1,590.00
    Maximize valve train efficiency and reliability with a shaft-mounted rocker arm kit engineered for serious small block Chevy builds. The 1.6:1 ratio delivers responsive lift characteristics ideal for mid-range and high-RPM performance, while full roller...
    JESKSS-436060
    SKU:
    JESKSS-436060
    Availability:
    Ships Same Business Day
    Weight:
    17.50 LBS
    $1,590.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,590.00
    Subtotal:
  • shaft rocker arm kit sbc 1.5/1.5 ratio kss-415050

    Shaft Rocker Arm Kit SBC 1.5/1.5 Ratio KSS-415050

    JESEL

    $1,590.00
    Maximize your small block Chevy's valve train efficiency with a purpose-built shaft rocker arm kit engineered for serious performance. Full roller design reduces friction and wear while maintaining precise valve actuation, giving you reliable power gains...
    JESKSS-415050
    SKU:
    JESKSS-415050
    Availability:
    Ships Same Business Day
    Weight:
    18.25 LBS
    $1,590.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,590.00
    Subtotal:
  • shaft rocker arm kit sbc 1.6/1.6 ratio kss-406060

    Shaft Rocker Arm Kit SBC 1.6/1.6 Ratio KSS-406060

    JESEL

    $1,590.00
    If you're running AFR Eliminator heads on a small block Chevy, valve train stability directly impacts your engine's ability to deliver consistent power across the RPM band. This shaft-mount rocker arm kit eliminates the compliance issues common to...
    JESKSS-406060
    SKU:
    JESKSS-406060
    Availability:
    Ships Same Business Day
    Weight:
    18.60 LBS
    $1,590.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,590.00
    Subtotal:
  • shaft rocker arm kit sbc 1.5/1.5 ratio kss-335050

    Shaft Rocker Arm Kit SBC 1.5/1.5 Ratio KSS-335050

    JESEL

    $1,535.00
    Shaft-mounted rocker arms deliver superior valvetrain stability and precision over stud-mount designs, especially critical for high-RPM applications where consistency matters. This complete 16-piece kit eliminates the need for sourcing individual...
    JESKSS-335050
    SKU:
    JESKSS-335050
    Availability:
    Ships Same Business Day
    Weight:
    17.00 LBS
    $1,535.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,535.00
    Subtotal:
  • shaft rocker arm kit ls1/ls6 1.7/1.7 ratio kss-317070t

    Shaft Rocker Arm Kit LS1/LS6 1.7/1.7 Ratio KSS-317070T

    JESEL

    $1,690.00
    Maximizing valve lift and duration is critical for serious LS builds, and shaft-mount rocker arms deliver superior geometry and reliability compared to stud-mounted alternatives. This 1.7:1 ratio kit unlocks additional valve travel on compatible cylinder...
    JESKSS-317070T
    SKU:
    JESKSS-317070T
    Availability:
    Ships Same Business Day
    Weight:
    14.25 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $1,690.00
    Subtotal:
  • sportsman solid roller lifter set sbc .904 dia ksl-905820-01

    Sportsman Solid Roller Lifter Set SBC .904 Dia KSL-905820-01

    JESEL

    $1,775.00
    A solid roller lifter set eliminates the complexity and maintenance demands of traditional hydraulic lifters, delivering consistent valve actuation cycle after cycle. For small block Chevy builds pushing higher RPMs and aggressive cam profiles, these...
    JESKSL-905820-01
    SKU:
    JESKSL-905820-01
    Availability:
    Ships Same Business Day
    Weight:
    5.15 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $1,775.00
    Subtotal:
  • sportsman solid roller lifter set sbf .875 dia ksl-875760-10

    Sportsman Solid Roller Lifter Set SBF .875 Dia KSL-875760-10

    JESEL

    $1,775.00
    A solid roller lifter set is essential for any serious small-block Ford build where you need reliable valve actuation without compromises. These mechanical roller lifters deliver consistent lift geometry and reduced friction compared to flat-tappet...
    JESKSL-875760-10
    SKU:
    JESKSL-875760-10
    Availability:
    Ships Same Business Day
    Weight:
    4.85 LBS
    $1,775.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,775.00
    Subtotal:
  • sportsman solid roller lifter set gm ls .842 ksl-842760-28

    Sportsman Solid Roller Lifter Set GM LS .842 KSL-842760-28

    JESEL

    $1,775.00
    Solid roller lifters eliminate lash and valve float at high RPMs, delivering the reliability and precision required for sustained high-performance operation on LS-series engines. This 16-piece Sportsman set provides the mechanical advantage needed for...
    JESKSL-842760-28
    SKU:
    JESKSL-842760-28
    Availability:
    Ships Same Business Day
    Weight:
    4.75 LBS
    $1,775.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,775.00
    Subtotal:
  • belt drive sbc w/+.391 raised cam location kbd-31500

    Belt Drive SBC w/+.391 Raised Cam Location KBD-31500

    JESEL

    $1,715.00
    A belt drive conversion eliminates timing chain wear and stretch, delivering consistent valve timing accuracy across extended engine life. This raised cam location design accommodates popular intake manifold configurations while maintaining optimal belt...
    JESKBD-31500
    SKU:
    JESKBD-31500
    Availability:
    Ships Same Business Day
    Weight:
    9.00 LBS
    $1,715.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,715.00
    Subtotal:
  • belt drive sbc w/bbc crank snout kbd-31200

    Belt Drive SBC w/BBC Crank Snout KBD-31200

    JESEL

    $1,215.00
    A belt drive camshaft system eliminates the wear and maintenance headaches of traditional chain drives while delivering superior valve timing precision under high RPM conditions. The KBD-31200 is engineered for small block Chevy applications with a BBC...
    JESKBD-31200
    SKU:
    JESKBD-31200
    Availability:
    Ships Same Business Day
    Weight:
    6.80 LBS
    $1,215.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,215.00
    Subtotal:
  • belt drive sbc kbd-31000

    Belt Drive SBC KBD-31000

    JESEL

    $1,195.00
    A belt drive conversion eliminates the reliability issues inherent to traditional chain systems while delivering consistent timing accuracy across high-RPM applications. The KBD-31000 is engineered for Small Block Chevy engines, offering a bolt-on...
    JESKBD-31000
    SKU:
    JESKBD-31000
    Availability:
    Ships Same Business Day
    Weight:
    7.00 LBS
    $1,195.00
    Qty in Cart: 0
    Quantity:
    Price:
    $1,195.00
    Subtotal:
  • piston ring set 4.130 bore .043 .043 3mm j71408-4130-5

    Piston Ring Set 4.130 Bore .043 .043 3mm J71408-4130-5

    JE PISTONS

    $299.99
    Piston ring failure is one of the fastest ways to lose compression and power in a high-rev engine. This premium race series set delivers the durability and precision fit required for sustained performance under extreme cylinder pressure and temperature...
    JEPJ71408-4130-5
    SKU:
    JEPJ71408-4130-5
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    $299.99
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    Subtotal:
  • sbc domed piston set 4.125 bore +10.8cc 301475

    SBC Domed Piston Set 4.125 Bore +10.8cc 301475

    JE PISTONS

    $1,099.99
    Building a high-compression small block that can handle boost or naturally aspirated power demands forged pistons engineered for durability under extreme combustion pressures. These SBC domed pistons deliver the compression ratio and ring stability your...
    JEP301475
    SKU:
    JEP301475
    Availability:
    Ships Same Business Day
    Weight:
    12.80 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $1,099.99
    Subtotal:
  • sbc domed piston set 4.000 bore +13.5cc 217240

    SBC Domed Piston Set 4.000 Bore +13.5cc 217240

    JE PISTONS

    $974.99
    Building a high-compression small block that demands precision and reliability? These SBC domed pistons deliver the exact displacement and compression geometry you need for forced induction or naturally aspirated performance. The +13.5cc dome provides...
    JEP217240
    SKU:
    JEP217240
    Availability:
    Ships Same Business Day
    Weight:
    13.45 LBS
    $974.99
    Qty in Cart: 0
    Quantity:
    Price:
    $974.99
    Subtotal:
  • sbc domed piston set 4.125 bore +3.3cc 213109

    SBC Domed Piston Set 4.125 Bore +3.3cc 213109

    JE PISTONS

    $1,024.99
    Building a high-compression SBC engine demands pistons engineered for both durability and peak combustion efficiency. These domed pistons deliver the compression ratio and quench clearance you need for aggressive ignition timing and maximum cylinder...
    JEP213109
    SKU:
    JEP213109
    Availability:
    Ships Same Business Day
    Weight:
    15.00 LBS
    $1,024.99
    Qty in Cart: 0
    Quantity:
    Price:
    $1,024.99
    Subtotal:
  • sbc forged ft piston set 4.165 bore -4.3cc 181941

    SBC Forged FT Piston Set 4.165 Bore -4.3cc 181941

    JE PISTONS

    $974.99
    Building a high-compression Small Block Chevy engine or refreshing a tired short block? These forged pistons deliver the durability and precision required for sustained high-RPM operation. The 23-degree flat-top design optimizes combustion chamber...
    JEP181941
    SKU:
    JEP181941
    Availability:
    Ships Same Business Day
    Weight:
    13.70 LBS
    $974.99
    Qty in Cart: 0
    Quantity:
    Price:
    $974.99
    Subtotal:
  • 1.470 dual valve spring kit - w/damper 98445-k12

    1.470 Dual Valve Spring Kit - w/Damper 98445-K12

    HOWARDS RACING COMPONENTS

    $242.99
    High-RPM stability and consistent valve control demand a dual spring setup that can handle sustained load cycles without fatigue or float. This 1.470 OD dual valve spring kit with damper delivers the pressure retention and harmonics management required...
    HRC98445-K12
    SKU:
    HRC98445-K12
    Availability:
    Ships Same Business Day
    Weight:
    5.58 LBS
    $242.99
    Qty in Cart: 0
    Quantity:
    Price:
    $242.99
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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