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Engine Fastener Kits

Engine Fastener Kits

Engine Fastener Kits

Circle Track Engine Fastener Kits at JJ Motorsports

Engine fasteners are precision-crafted to securely connect vital engine parts, like camshafts and carburetors, for peak performance under pressure. These durable options are indispensable for maintaining a powerful and reliable engine setup alongside other durable fastener solutions.

Shop trusted brands like Allstar Performance, Wehrs Machine, MSD Ignition, Moroso, Chevrolet Performance, Dart, Comp Cams. Explore related categories such as Exhaust Manifold/Header Fastener Kits, Rocker Arm Fastener Kits, Valve Cover Fastener Kits, Cylinder Head Fastener Kits, Carburetor Fastener Kits.

Top Circle Track Engine Fastener Kits

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
  • Mounting Bolt - 7/16 x 2.000 YTRYT6088

    Mounting Bolt - 7/16 x 2.000 YTRYT6088

    YELLA TERRA

    $4.99
    Rocker arm bolts are critical fasteners that secure your valve train geometry under extreme loads and RPM swings. A quality bolt like this Yella Terra unit prevents deflection and slippage that can cause valve timing issues, increased wear, and...
    YTRYT6088
    SKU:
    YTRYT6088
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    YT6088
    $4.99
    Qty in Cart: 0
    Quantity:
    Price:
    $4.99
    Subtotal:
  • Carburetor Studs  TRA2106

    Carburetor Studs 2106

    TRANS-DAPT

    $5.99
    Carburetor studs are a critical fastening component that directly impacts the integrity of your intake manifold seal. A loose or corroded stud can lead to vacuum leaks, erratic idle conditions, and performance loss—issues that ripple through your entire...
    TRA2106
    SKU:
    TRA2106
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    MFG Part #:
    2106
    $5.99
    Qty in Cart: 0
    Quantity:
    Price:
    $5.99
    Subtotal:
  • Carburetor Studs  TRA2047

    Carburetor Studs 2047

    TRANS-DAPT

    $5.99
    Carburetor mounting integrity is critical—loose or corroded studs compromise fuel delivery precision and create safety hazards on the track or street. The Carburetor Studs 2047 provide a reliable, direct replacement solution with corrosion-resistant zinc...
    TRA2047
    SKU:
    TRA2047
    Availability:
    Ships Same Business Day
    Weight:
    0.22 LBS
    MFG Part #:
    2047
    $5.99
    Qty in Cart: 0
    Quantity:
    Price:
    $5.99
    Subtotal:
  • Carburetor Studs  TRA2046

    Carburetor Studs 2046

    TRANS-DAPT

    $5.99
    Carburetor studs are critical fasteners that secure your carburetor to the intake manifold—a connection that demands precision and reliability under thermal cycling and vibration. Loose or corroded studs compromise fuel delivery and can lead to vacuum...
    TRA2046
    SKU:
    TRA2046
    Availability:
    Ships Same Business Day
    Weight:
    0.19 LBS
    MFG Part #:
    2046
    $5.99
    Qty in Cart: 0
    Quantity:
    Price:
    $5.99
    Subtotal:
  • Starter Accessory Pack Bolts & Shims TIL54-950

    Starter Accessory Pack Bolts & Shims 54-950

    TILTON

    $11.90
    Starter shim and bolt kits are critical for proper starter motor alignment and securing your electrical system during high-performance driving. Misalignment causes premature wear on starter drive teeth and ring gears—a costly failure in race conditions...
    TIL54-950
    SKU:
    TIL54-950
    Availability:
    Ships Same Business Day
    Weight:
    0.33 LBS
    MFG Part #:
    54-950
    $11.90
    Qty in Cart: 0
    Quantity:
    Price:
    $11.90
    Subtotal:
  • Snap Strap 6pk of 18in  THE13160

    Snap Strap 6pk of 18in 13160

    THERMO-TEC

    $22.17
    Exhaust wrap deteriorates without proper securing—loose wrapping compromises thermal insulation and creates a sloppy appearance. These stainless steel snap straps provide reliable, tool-free fastening that won't corrode or fail under engine bay heat...
    THE13160
    SKU:
    THE13160
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    13160
    $22.17
    Qty in Cart: 0
    Quantity:
    Price:
    $22.17
    Subtotal:
  • Snap Strap 12pk Of 9in  THE13150

    Snap Strap 12pk Of 9in 13150

    THERMO-TEC

    $33.76
    Exhaust wrap deteriorates quickly without proper fastening, compromising both aesthetics and heat containment on your engine bay. These stainless steel snap straps provide a reliable, reusable solution that won't corrode or fail under thermal cycling,...
    THE13150
    SKU:
    THE13150
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MFG Part #:
    13150
    $33.76
    Qty in Cart: 0
    Quantity:
    Price:
    $33.76
    Subtotal:
  • Snap Strap Kit For V-8 Engines THE13101

    Snap Strap Kit For V-8 Engines 13101

    THERMO-TEC

    $37.33
    Managing exhaust heat is critical to protecting engine bay components and maximizing underhood longevity. The Snap Strap Kit for V-8 engines provides a purpose-built solution with stainless steel ties sized specifically for larger displacement builds...
    THE13101
    SKU:
    THE13101
    Availability:
    Ships Same Business Day
    Weight:
    0.18 LBS
    MFG Part #:
    13101
    $37.33
    Qty in Cart: 0
    Quantity:
    Price:
    $37.33
    Subtotal:
  • 12pt Flange Bolt - Stand 7/16-14x1-1/2 TDM05225

    12pt Flange Bolt - Stand 7/16-14x1-1/2 5225

    T AND D MACHINE

    $4.99
    Rocker arm stand bolts are critical fasteners that anchor your rocker arm assembly to the cylinder head—any slack or failure here compromises valve timing and can lead to catastrophic engine damage. This 12-point flange bolt features precise 7/16-14...
    TDM05225
    SKU:
    TDM05225
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MFG Part #:
    05225*
    $4.99
    Qty in Cart: 0
    Quantity:
    Price:
    $4.99
    Subtotal:
  • Stand Bolt - 7/16-14 x 1.250 12pt TDM05220

    Stand Bolt - 7/16-14 x 1.250 12pt 5220

    T AND D MACHINE

    $3.99
    Rocker arm stand bolts are critical fasteners that maintain precise valve train geometry under extreme engine loads. A quality bolt like this 7/16-14 ensures consistent clamping force cycle after cycle, preventing valve train deflection that compromises...
    TDM05220
    SKU:
    TDM05220
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MFG Part #:
    5220
    $3.99
    Qty in Cart: 0
    Quantity:
    Price:
    $3.99
    Subtotal:
  • 12pt Flange Bolt - Stand 7/16-14 x 7/8 TDM05205

    12pt Flange Bolt - Stand 7/16-14 x 7/8 5205

    T AND D MACHINE

    $3.99
    A properly secured rocker arm stand is critical to engine reliability and consistent valve train geometry. This 12-point flange bolt delivers precision fitment and repeatable clamping force where it matters most. Whether you're building a race engine or...
    TDM05205
    SKU:
    TDM05205
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    MFG Part #:
    5205
    $3.99
    Qty in Cart: 0
    Quantity:
    Price:
    $3.99
    Subtotal:
  • 5/16 Hold Down Nut - 12pt. TDM05120

    5/16 Hold Down Nut - 12pt. 5120

    T AND D MACHINE

    $3.99
    Rocker arm assemblies demand precise fastening to maintain valve train geometry and prevent slippage under high RPM conditions. This 5/16 hold down nut delivers the clamping force and thread integrity needed for consistent performance, whether you're...
    TDM05120
    SKU:
    TDM05120
    Availability:
    Ships Same Business Day
    Weight:
    0.01 LBS
    MFG Part #:
    5120
    $3.99
    Qty in Cart: 0
    Quantity:
    Price:
    $3.99
    Subtotal:
  • Shaft Bolt - 5/16-18 x 1.250 12pt. TDM05106

    Shaft Bolt - 5/16-18 x 1.250 12pt. 5106

    T AND D MACHINE

    $8.99
    A quality rocker arm shaft bolt is critical to maintaining proper valve train geometry and preventing costly engine damage from fastener failure. This 5/16-18 x 1.250 12-point steel bolt delivers the precision fitment and reliable clamping force your...
    TDM05106
    SKU:
    TDM05106
    Availability:
    Ships Same Business Day
    Weight:
    0.03 LBS
    MFG Part #:
    5106
    $8.99
    Qty in Cart: 0
    Quantity:
    Price:
    $8.99
    Subtotal:
  • 5/16 x 1.890 Hold Down Stud TDM05051

    5/16 x 1.890 Hold Down Stud 5051

    T AND D MACHINE

    $3.99
    Rocker arm hold down studs are critical fastening points in any high-performance engine build—a loose or failing stud can cause valve train instability and catastrophic engine damage. This 5/16 hold down stud from JJ-Motorsports is manufactured to OEM...
    TDM05051
    SKU:
    TDM05051
    Availability:
    Ships Same Business Day
    Weight:
    0.03 LBS
    MFG Part #:
    5051
    $3.99
    Qty in Cart: 0
    Quantity:
    Price:
    $3.99
    Subtotal:
  • Rocker Arm Jam Nut - 7/16-20 12pt. TDM03210

    Rocker Arm Jam Nut - 7/16-20 12pt. 3210

    T AND D MACHINE

    $2.99
    Proper valve train geometry depends on accurate rocker arm adjustment, and a quality jam nut is critical to maintaining that setting under the vibration and thermal cycles of racing or high-performance street driving. This 7/16-20 jam nut locks your...
    TDM03210
    SKU:
    TDM03210
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    MFG Part #:
    3210
    $2.99
    Qty in Cart: 0
    Quantity:
    Price:
    $2.99
    Subtotal:
  • Air Cleaner Stud 4130 5/16-18 SWE901-10150

    Sweet Air Cleaner Stud 4130 5/16-18 901-10150

    SWEET

    $42.99
    A quality air cleaner mounting stud is essential for securing your intake system without compromise—loose or inadequate fasteners can lead to vacuum leaks and inconsistent engine performance. This Sweet 4130 chromoly stud delivers the durability and...
    SWE901-10150
    SKU:
    SWE901-10150
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    MFG Part #:
    901-10150
    $42.99
    Qty in Cart: 0
    Quantity:
    Price:
    $42.99
    Subtotal:
  • Pump Bolt Kit 30030-3003  SWE325-30037

    Sweet Pump Bolt Kit 30030-3003 325-30037

    SWEET

    $10.99
    A quality power steering bracket hardware kit is essential for small block Chevy builds where reliability and proper component alignment directly impact steering response and system longevity. This pump-to-bracket mounting solution ensures secure,...
    SWE325-30037
    SKU:
    SWE325-30037
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MFG Part #:
    325-30037
    $10.99
    Qty in Cart: 0
    Quantity:
    Price:
    $10.99
    Subtotal:
  • Poly Locks - 7/16 (4pk)  SPNPL716-4

    Poly Locks - 7/16 (4pk) PL716-4

    SCORPION PERFORMANCE

    $15.83
    Rocker arm nuts are critical fasteners that demand absolute security under extreme valvetrain loads and vibration. Standard nuts can loosen over time, leading to valve train damage and catastrophic engine failure. JJ-Motorsports' Poly Locks eliminate...
    SPNPL716-4
    SKU:
    SPNPL716-4
    Availability:
    Ships Same Business Day
    Weight:
    0.26 LBS
    MFG Part #:
    PL716-4
    $15.83
    Qty in Cart: 0
    Quantity:
    Price:
    $15.83
    Subtotal:
  • Poly Locks - 3/8 (4pk)  SPNPL38-4

    Poly Locks - 3/8 (4pk) PL38-4

    SCORPION PERFORMANCE

    $15.83
    Rocker arm nuts are critical fastening points that experience constant vibration and thermal cycling on the track. These Poly Locks deliver reliable, non-slip fastening that won't loosen under extreme engine conditions, keeping your valve train secure...
    SPNPL38-4
    SKU:
    SPNPL38-4
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    MFG Part #:
    PL38-4
    $15.83
    Qty in Cart: 0
    Quantity:
    Price:
    $15.83
    Subtotal:
  • 7/16 Adjusting Nuts (4pk) SHPPL716K

    7/16 Adjusting Nuts (4pk) PL716K

    SHARP ROCKERS

    $32.99
    Rocker arm geometry demands precision, and loose or worn adjusting nuts compromise both valve timing and engine reliability. These polylock nuts eliminate the need for lock washers and constant re-torquing, keeping your valve train stable through the...
    SHPPL716K
    SKU:
    SHPPL716K
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    MFG Part #:
    PL716K
    $32.99
    Qty in Cart: 0
    Quantity:
    Price:
    $32.99
    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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