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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
  • GM LS Roller R/A's - 1.7 Ratio 8mm Ped Mnt SPN1098

    GM LS Roller R/A's - 1.7 Ratio 8mm Ped Mnt 1098

    SCORPION PERFORMANCE

    $589.88
    GM LS rocker arms are critical to maximizing valve lift and duration without sacrificing reliability—these 1.7-ratio roller units directly increase flow efficiency and reduce parasitic drag compared...
    SPN1098
    SKU:
    SPN1098
    Availability:
    Ships Same Business Day
    Weight:
    6.63 LBS
    MFG Part #:
    1098
    Qty in Cart: 0
    Quantity:
    Price:
    $589.88
    Subtotal:
  • SBC Roller Rocker Arms 1.5/1.6 Ratio 7/16 Stud SPN1028

    SBC Roller Rocker Arms 1.5/1.6 Ratio 7/16 Stud 1028

    SCORPION PERFORMANCE

    $446.65
    Roller rocker arms are essential for maximizing valve lift and duration without sacrificing reliability, especially in high-RPM racing applications. These full-roller units reduce friction across the...
    SPN1028
    SKU:
    SPN1028
    Availability:
    Ships Same Business Day
    Weight:
    8.45 LBS
    MFG Part #:
    1028
    $446.65
    Qty in Cart: 0
    Quantity:
    Price:
    $446.65
    Subtotal:
  • SBF Roller Rocker Arms 1.72 Ratio 3/8 Stud SPN1019

    SBF Roller Rocker Arms 1.72 Ratio 3/8 Stud 1019

    SCORPION PERFORMANCE

    $446.65
    Maximize your SBF's valve train efficiency with a full roller design that reduces friction and increases lift consistency across the RPM band. These 1.72:1 ratio rocker arms deliver measurable gains...
    SPN1019
    SKU:
    SPN1019
    Availability:
    Ships Same Business Day
    Weight:
    8.70 LBS
    MFG Part #:
    1019
    $446.65
    Qty in Cart: 0
    Quantity:
    Price:
    $446.65
    Subtotal:
  • SBF Roller Rocker Arms 1.6 Ratio 7/16 Stud SPN1018

    SBF Roller Rocker Arms 1.6 Ratio 7/16 Stud 1018

    SCORPION PERFORMANCE

    $446.65
    Maximize valve lift and duration without sacrificing reliability—roller rocker arms reduce friction across the entire RPM band, translating to faster valve transitions and measurable horsepower gains...
    SPN1018
    SKU:
    SPN1018
    Availability:
    Ships Same Business Day
    Weight:
    8.50 LBS
    MFG Part #:
    1018
    $446.65
    Qty in Cart: 0
    Quantity:
    Price:
    $446.65
    Subtotal:
  • Piston Ring Set 4.020 1/16 1/16 3/16 SEAR9771-25

    Piston Ring Set 4.020 1/16 1/16 3/16 SEAR9771-25

    SEALED POWER

    $159.99
    Piston rings are critical to engine sealing and compression retention—without quality rings, you're losing power and risking blow-by that degrades performance. The Speed Pro 4.020 Ring Set delivers...
    SEAR9771-25
    SKU:
    SEAR9771-25
    Availability:
    Ships Same Business Day
    Weight:
    1.10 LBS
    MFG Part #:
    R977125
    $159.99
    Qty in Cart: 0
    Quantity:
    Price:
    $159.99
    Subtotal:
  • Piston Ring Set 4.040 1/16 1/16 3/16 SEAR9401-45

    Piston Ring Set 4.040 1/16 1/16 3/16 SEAR9401-45

    SEALED POWER

    $150.99
    Piston ring quality directly impacts compression, oil control, and engine longevity—especially in high-demand racing and performance applications. The Speed Pro 4.040 ring set delivers low-tension...
    SEAR9401-45
    SKU:
    SEAR9401-45
    Availability:
    Ships Same Business Day
    Weight:
    1.02 LBS
    MFG Part #:
    R940145
    $150.99
    Qty in Cart: 0
    Quantity:
    Price:
    $150.99
    Subtotal:
  • Piston Ring Set 4.060 5/64 5/64 3/16 SEAR9343-65

    Piston Ring Set 4.060 5/64 5/64 3/16 SEAR9343-65

    SEALED POWER

    $184.99
    A quality piston ring set is critical for maintaining proper compression, oil control, and ring seal in high-performance engines. Speed Pro's plasma-moly construction delivers superior wear...
    SEAR9343-65
    SKU:
    SEAR9343-65
    Availability:
    Ships Same Business Day
    Weight:
    1.12 LBS
    MFG Part #:
    R934365
    $184.99
    Qty in Cart: 0
    Quantity:
    Price:
    $184.99
    Subtotal:
  • Main Bearing Set  SEA140M20

    Main Bearing Set SEA140M20

    SEALED POWER

    $104.99
    Main bearing wear directly impacts engine longevity, oil pressure stability, and overall reliability—especially in performance applications where tight tolerances are non-negotiable. This...
    SEA140M20
    SKU:
    SEA140M20
    Availability:
    Ships Same Business Day
    Weight:
    1.48 LBS
    MFG Part #:
    140M20
    Qty in Cart: 0
    Quantity:
    Price:
    $104.99
    Subtotal:
  • Main Bearing Set  SEA139M20

    Main Bearing Set SEA139M20

    SEALED POWER

    $82.99
    A quality main bearing set is foundational to engine longevity and reliability, especially in high-revving or rebuilt engines where precision fit directly impacts oil pressure and overall durability...
    SEA139M20
    SKU:
    SEA139M20
    Availability:
    Ships Same Business Day
    Weight:
    1.35 LBS
    MFG Part #:
    139M20
    $82.99
    Qty in Cart: 0
    Quantity:
    Price:
    $82.99
    Subtotal:
  • 3 Stage Dry Sump Pump SBC Engine Mount SCPSCP-201A

    3 Stage Dry Sump Pump SBC Engine Mount SCP-201A

    STOCK CAR PROD-OIL PUMPS

    $964.99
    A dry sump system is essential for high-performance and competition engines, eliminating oil starvation during sustained cornering, acceleration, and deceleration. The SCP-201A delivers reliable oil...
    SCPSCP-201A
    SKU:
    SCPSCP-201A
    Availability:
    Ships Same Business Day
    Weight:
    8.64 LBS
    MFG Part #:
    SCP-201-A
    $964.99
    Qty in Cart: 0
    Quantity:
    Price:
    $964.99
    Subtotal:
  • Medium Pressure Spring  SCP1473

    Medium Pressure Spring 1473

    STOCK CAR PROD-OIL PUMPS

    $10.99
    Oil pump reliability is the foundation of engine longevity, and a worn or mismatched relief spring compromises both pressure stability and component protection. The Medium Pressure Spring 1473 is...
    SCP1473
    SKU:
    SCP1473
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    MFG Part #:
    1473
    Qty in Cart: 0
    Quantity:
    Price:
    $10.99
    Subtotal:
  • SBC 4340 Forged Crank - 3.875 Stroke SCA4-350-3875-6000

    SBC 4340 Forged Crank - 3.875 Stroke 4-350-3875-6000

    SCAT ENTERPRISES

    $944.99
    If you're building a high-displacement Small Block Chevy engine and need the backbone to handle sustained power and torque, a quality forged crankshaft is non-negotiable. The SBC 4340 Forged Crank...
    SCA4-350-3875-6000
    SKU:
    SCA4-350-3875-6000
    Availability:
    Ships Same Business Day
    Weight:
    58.05 LBS
    MFG Part #:
    4-350-3875-6000
    $944.99
    Qty in Cart: 0
    Quantity:
    Price:
    $944.99
    Subtotal:
  • SBF 4340 Forged Crank - 3.000 Stroke SCA4-302-3000-5090-2123

    SBF 4340 Forged Crank - 3.000 Stroke 4-302-3000-5090-2123

    SCAT ENTERPRISES

    $910.99
    A forged steel crankshaft is the backbone of any high-rpm small block engine, and this 3.000-stroke SBF crank delivers the durability and precision required for sustained performance. Whether you're...
    SCA4-302-3000-5090-2123
    SKU:
    SCA4-302-3000-5090-2123
    Availability:
    Ships Same Business Day
    Weight:
    49.75 LBS
    MFG Part #:
    4-302-3000-5090-2123
    $910.99
    Qty in Cart: 0
    Quantity:
    Price:
    $910.99
    Subtotal:
  • SBC 4340 Forged I-Beam Rods 5.700 SCA3-ICR5700

    SBC 4340 Forged I-Beam Rods 5.700 3-ICR5700

    SCAT ENTERPRISES

    $422.99
    If you're building or rebuilding an SBC engine for serious power, stock connecting rods won't cut it. These 4340 forged I-beam rods deliver the strength and reliability needed to handle boost,...
    SCA3-ICR5700
    SKU:
    SCA3-ICR5700
    Availability:
    Ships Same Business Day
    Weight:
    12.15 LBS
    MFG Part #:
    3-ICR5700
    $422.99
    Qty in Cart: 0
    Quantity:
    Price:
    $422.99
    Subtotal:
  • SBC 4340 Forged I-Beam Rods 6.200 w/7/16 Bolts SCA2-ICR6200-7/16

    SBC 4340 Forged I-Beam Rods 6.200 w/7/16 Bolts 2-ICR6200-7/16

    SCAT ENTERPRISES

    $557.99
    If you're building a high-revving small block Chevy that demands reliability under extreme load, connecting rod strength is non-negotiable. Pro Comp's 4340 forged I-beam design delivers the...
    SCA2-ICR6200-7/16
    SKU:
    SCA2-ICR6200-7/16
    Availability:
    Ships Same Business Day
    Weight:
    12.03 LBS
    MFG Part #:
    2-ICR6200-7/16
    Qty in Cart: 0
    Quantity:
    Price:
    $557.99
    Subtotal:
  • Oil Pump Bracket Kit Top Mount QTR117600

    Quarter Master Oil Pump Bracket Kit Top Mount 117600

    QUARTER MASTER

    $256.30
    If you're running a Quarter Master clutchless bellhousing setup, a quality oil pump bracket is non-negotiable—it ensures consistent oil delivery to critical engine components under high-RPM stress...
    QTR117600
    SKU:
    QTR117600
    Availability:
    Ships Same Business Day
    Weight:
    1.32 LBS
    MFG Part #:
    117600
    $256.30
    Qty in Cart: 0
    Quantity:
    Price:
    $256.30
    Subtotal:
  • Oil Filter Element 75 Mic w/o Bypass PTR09-0440

    Peterson Fluid Oil Filter Element 75 Mic w/o Bypass 09-0440

    PETERSON FLUID

    $102.99
    Keep your high-performance engine protected with this Peterson Fluid Oil Filter Element, designed to remove contaminants while maintaining optimal flow rates in forced induction and naturally...
    PTR09-0440
    SKU:
    PTR09-0440
    Availability:
    Ships Same Business Day
    Weight:
    0.47 LBS
    MFG Part #:
    09-0440
    $102.99
    Qty in Cart: 0
    Quantity:
    Price:
    $102.99
    Subtotal:
  • In Line Repl Scav.Screen  PTR09-0411

    Peterson Fluid In Line Repl Scav.Screen 09-0411

    PETERSON FLUID

    $21.99
    Maintaining clean scavenge oil is critical to engine longevity and reliability—contamination in your return circuit can compromise bearing protection and increase wear rates. The Peterson Fluid In...
    PTR09-0411
    SKU:
    PTR09-0411
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    MFG Part #:
    09-0411
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    Subtotal:
  • Dry Sump Tank 2.5 Gal  PTR08-0008

    Peterson Fluid Dry Sump Tank 2.5 Gal 08-0008

    PETERSON FLUID

    $970.99
    A dry sump system is essential for maintaining consistent oil pressure and cooling during sustained high-performance driving—especially in vehicles that experience extreme lateral G-forces or...
    PTR08-0008
    SKU:
    PTR08-0008
    Availability:
    Ships Same Business Day
    Weight:
    8.88 LBS
    MFG Part #:
    08-0008
    $970.99
    Qty in Cart: 0
    Quantity:
    Price:
    $970.99
    Subtotal:
  • Pulley Flange For 05-1344 (ea) PTR05-1644

    Peterson Fluid Pulley Flange For 05-1344 (ea) 05-1644

    PETERSON FLUID

    $62.99
    If you're running Peterson fluid pulleys on your high-performance engine, a reliable flange is essential for maintaining proper belt tension and preventing costly slippage during peak boost...
    PTR05-1644
    SKU:
    PTR05-1644
    Availability:
    Ships Same Business Day
    Weight:
    0.13 LBS
    MFG Part #:
    05-1644
    $62.99
    Qty in Cart: 0
    Quantity:
    Price:
    $62.99
    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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