Select Your Ride

1
2
3

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
  • 5/16 Hi-Tech Pushrods - 7.750 Long COM7970-16

    Comp Cams 5/16 Hi-Tech Pushrods - 7.750 Long 7970-16

    COMP CAMS

    $191.95
    Pushrods are critical to valve timing accuracy and engine reliability—cheap ones flex under high RPM, throwing off your cam timing and killing power. Comp Cams Hi-Tech Pushrods eliminate flex with chromoly construction and precise tolerances, ensuring...
    COM7970-16
    SKU:
    COM7970-16
    Availability:
    Ships Same Business Day
    Weight:
    2.10 LBS
    MFG Part #:
    7970-16
    $191.95
    Qty in Cart: 0
    Quantity:
    Price:
    $191.95
    Subtotal:
  • 5/16 Hi-Tech Pushrods - 8.200 Long COM7966-16

    Comp Cams 5/16 Hi-Tech Pushrods - 8.200 Long 7966-16

    COMP CAMS

    $195.95
    Pushrods are critical to your valvetrain's ability to transfer camshaft motion with precision and minimal deflection. The Comp Cams Hi-Tech design combines chromoly construction with a 0.080-inch thick wall to handle high-RPM loads while maintaining the...
    COM7966-16
    SKU:
    COM7966-16
    Availability:
    Ships Same Business Day
    Weight:
    2.38 LBS
    MFG Part #:
    7966-16
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • 5/16 Hi-Tech Pushrods - 8.150 Long COM7965-16

    Comp Cams 5/16 Hi-Tech Pushrods - 8.150 Long 7965-16

    COMP CAMS

    $191.95
    Pushrods are the backbone of your valvetrain geometry—weak ones introduce deflection, valve float, and lost power. Comp Cams Hi-Tech Pushrods deliver the rigidity and precision needed for high-RPM applications without the weight penalty of solid steel...
    COM7965-16
    SKU:
    COM7965-16
    Availability:
    Ships Same Business Day
    Weight:
    2.34 LBS
    MFG Part #:
    7965-16
    $191.95
    Qty in Cart: 0
    Quantity:
    Price:
    $191.95
    Subtotal:
  • 5/16 Hi-Tech Pushrods - 7.700 Long COM7963-16

    Comp Cams 5/16 Hi-Tech Pushrods - 7.700 Long 7963-16

    COMP CAMS

    $191.95
    Pushrods are critical valvetrain components that demand precision engineering and material integrity—any deflection or failure cascades into valve timing issues and catastrophic engine damage. Comp Cams' Hi-Tech pushrods are manufactured from chromoly...
    COM7963-16
    SKU:
    COM7963-16
    Availability:
    Ships Same Business Day
    Weight:
    2.23 LBS
    MFG Part #:
    7963-16
    $191.95
    Qty in Cart: 0
    Quantity:
    Price:
    $191.95
    Subtotal:
  • 3/8 Hi-Tech Pushrods - 7.800 Long COM7913-16

    Comp Cams 3/8 Hi-Tech Pushrods - 7.800 Long 7913-16

    COMP CAMS

    $222.95
    Comp Cams Hi-Tech Pushrods deliver the valve train stability and reliability your small block Chevy demands under sustained high-RPM operation. Built from chromoly with a precisely engineered 0.080" wall thickness, these pushrods resist deflection and...
    COM7913-16
    SKU:
    COM7913-16
    Availability:
    Ships Same Business Day
    Weight:
    2.84 LBS
    MFG Part #:
    7913-16
    Qty in Cart: 0
    Quantity:
    Price:
    $222.95
    Subtotal:
  • 5/16 Hi-Energy Pushrods - 8.152 Long COM7835-16

    Comp Cams 5/16 Hi-Energy Pushrods - 8.152 Long 7835-16

    COMP CAMS

    $45.95
    Comp Cams Hi-Energy Pushrods are engineered to handle sustained high-RPM operation without deflection or flex that robs your engine of power. If you're running a performance Small Block Ford, these steel pushrods deliver the valvetrain stability needed...
    COM7835-16
    SKU:
    COM7835-16
    Availability:
    Ships Same Business Day
    Weight:
    2.07 LBS
    MFG Part #:
    7835-16
    $45.95
    Qty in Cart: 0
    Quantity:
    Price:
    $45.95
    Subtotal:
  • 5/16 Hi-Energy Pushrods - 6.881 Long COM7831-16

    Comp Cams 5/16 Hi-Energy Pushrods - 6.881 Long 7831-16

    COMP CAMS

    $44.95
    Pushrods are the critical link between your camshaft and rocker arms—and cheap ones will rob you of power, precision, and reliability. Comp Cams Hi-Energy Pushrods are engineered for high-RPM stability and consistent valve actuation, ensuring your small...
    COM7831-16
    SKU:
    COM7831-16
    Availability:
    Ships Same Business Day
    Weight:
    1.76 LBS
    MFG Part #:
    7831-16
    $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    $44.95
    Subtotal:
  • 5/16 Hi-Energy Pushrods - 7.794 Long COM7812-16

    Comp Cams 5/16 Hi-Energy Pushrods - 7.794 Long 7812-16

    COMP CAMS

    $44.95
    Comp Cams Hi-Energy Pushrods deliver reliable valve actuation with minimal deflection, critical for maintaining precise valve timing under high-RPM conditions. These 5/16" steel pushrods are engineered for small block Chevy and AMC V8 applications where...
    COM7812-16
    SKU:
    COM7812-16
    Availability:
    Ships Same Business Day
    Weight:
    1.96 LBS
    MFG Part #:
    7812-16
    $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    $44.95
    Subtotal:
  • 5/16 Magnum Pushrods - 8.000 Long COM7695-16

    Comp Cams 5/16 Magnum Pushrods - 8.000 Long 7695-16

    COMP CAMS

    $154.95
    Pushrods are critical to accurate valve timing and engine reliability—weak or worn units introduce unwanted valvetrain clearance and can compromise performance across the entire RPM band. Comp Cams' Magnum line delivers chromoly construction with 0...
    COM7695-16
    SKU:
    COM7695-16
    Availability:
    Ships Same Business Day
    Weight:
    2.32 LBS
    MFG Part #:
    7695-16
    $154.95
    Qty in Cart: 0
    Quantity:
    Price:
    $154.95
    Subtotal:
  • 5/16 Magnum Pushrods - 7.900 Long COM7693-16

    Comp Cams 5/16 Magnum Pushrods - 7.900 Long 7693-16

    COMP CAMS

    $154.95
    Pushrods are critical for reliable valve actuation, and worn or inadequate units can cause valve float, timing issues, and catastrophic engine damage. Comp Cams' Magnum Pushrods deliver the strength and precision needed for high-RPM applications, with 0...
    COM7693-16
    SKU:
    COM7693-16
    Availability:
    Ships Same Business Day
    Weight:
    2.31 LBS
    MFG Part #:
    7693-16
    $154.95
    Qty in Cart: 0
    Quantity:
    Price:
    $154.95
    Subtotal:
  • Steel Valve Spring Retainer- 7 Degree COM768-16

    Comp Cams Steel Valve Spring Retainer- 7 Degree 768-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical components that keep your dual springs seated and functioning at peak efficiency under high RPM loads. Using quality steel retainers like these ensures consistent valve control and prevents spring surge that can lead...
    COM768-16
    SKU:
    COM768-16
    Availability:
    Ships Same Business Day
    Weight:
    1.26 LBS
    MFG Part #:
    768-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Super Lock Valve Spring Retainer Steel-10 Degree COM750-16

    Comp Cams Super Lock Valve Spring Retainer Steel-10 Degree 750-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining consistent spring pressure and preventing valve float at high RPM—especially in forced induction or heavily modified engines. Comp Cams' Super Lock design uses a proven 10-degree geometry to maximize...
    COM750-16
    SKU:
    COM750-16
    Availability:
    Ships Same Business Day
    Weight:
    0.92 LBS
    MFG Part #:
    750-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Super Lock Valve Spring Retainer Steel-10 Degree COM748-16

    Comp Cams Super Lock Valve Spring Retainer Steel-10 Degree 748-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining consistent spring pressure and preventing valve float at high RPM—especially in forced induction or heavily modified engines. The Comp Cams Super Lock design locks onto your spring seats with precision,...
    COM748-16
    SKU:
    COM748-16
    Availability:
    Ships Same Business Day
    Weight:
    1.20 LBS
    MFG Part #:
    748-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • 5/16 Magnum Pushrod Ford 351w 1969-78 8.150 Long COM7472-16

    Comp Cams 5/16 Magnum Pushrod Ford 351w 1969-78 8.150 Long 7472-16

    COMP CAMS

    $154.95
    Pushrods are critical to reliable valve actuation in your 351W engine—and stock units often flex under high RPM, causing valvetrain instability and inconsistent lift. Comp Cams' Magnum Pushrods deliver the rigidity and precision you need for aggressive...
    COM7472-16
    SKU:
    COM7472-16
    Availability:
    Ships Same Business Day
    Weight:
    2.35 LBS
    MFG Part #:
    7472-16
    $154.95
    Qty in Cart: 0
    Quantity:
    Price:
    $154.95
    Subtotal:
  • Super Lock Valve Spring Retainer Steel-10 Degree COM747-16

    Comp Cams Super Lock Valve Spring Retainer Steel-10 Degree 747-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical components that directly impact valve control and engine reliability at high RPM. The Comp Cams Super Lock design prevents spring surge and maintains consistent valve seating, which is essential for engines running...
    COM747-16
    SKU:
    COM747-16
    Availability:
    Ships Same Business Day
    Weight:
    1.15 LBS
    MFG Part #:
    747-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Valve Spring Retainers Steel- 7 Degree COM743-16

    Comp Cams Valve Spring Retainers Steel- 7 Degree 743-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining consistent spring pressure and preventing valve float at high RPMs—especially in forced induction or high-lift cam applications. Comp Cams' steel retainers are precision-machined to exact specifications,...
    COM743-16
    SKU:
    COM743-16
    Availability:
    Ships Same Business Day
    Weight:
    1.29 LBS
    MFG Part #:
    743-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Valve Spring Retainers Steel- 7 Degree COM742-16

    Comp Cams Valve Spring Retainers Steel- 7 Degree 742-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining consistent spring pressure and preventing valve float at high RPM—especially when you're pushing aggressive cam profiles. These Comp Cams steel retainers ensure reliable valvetrain geometry and...
    COM742-16
    SKU:
    COM742-16
    Availability:
    Ships Same Business Day
    Weight:
    0.99 LBS
    MFG Part #:
    742-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Valve Spring Retainers Steel- 10 Degree COM741-16

    Comp Cams Valve Spring Retainers Steel- 10 Degree 741-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining valve train stability and preventing costly spring failure under high RPM conditions. These Comp Cams steel retainers feature a Super Lock design that locks securely onto your valve stems, eliminating...
    COM741-16
    SKU:
    COM741-16
    Availability:
    Ships Same Business Day
    Weight:
    1.33 LBS
    MFG Part #:
    741-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Valve Spring Retainers Steel- 10 Degree COM740-16

    Comp Cams Valve Spring Retainers Steel- 10 Degree 740-16

    COMP CAMS

    $85.95
    Valve spring retainers are critical to maintaining consistent spring pressure and preventing valve float at high RPM—especially in forced induction or heavily modified engines. Comp Cams' steel retainers with 10-degree geometry deliver reliable...
    COM740-16
    SKU:
    COM740-16
    Availability:
    Ships Same Business Day
    Weight:
    1.17 LBS
    MFG Part #:
    740-16
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • Titanium Valve Spring Retainer- 10 Degree COM738-16

    Comp Cams Titanium Valve Spring Retainer- 10 Degree 738-16

    COMP CAMS

    $407.95
    Titanium valve spring retainers reduce rotational mass and inertia, enabling faster valve actuation and more consistent rpm performance across your entire power band. By eliminating the weight penalty of steel retainers, you gain improved valve control...
    COM738-16
    SKU:
    COM738-16
    Availability:
    Ships Same Business Day
    Weight:
    0.76 LBS
    MFG Part #:
    738-16
    $407.95
    Qty in Cart: 0
    Quantity:
    Price:
    $407.95
    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

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER