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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
  • J J MOTORSPORTS Air Filter Nut 5/16-18 Aluminum Anodized Red IMCA Modifieds Late Models J J MOTORSPORTS Air Filter Nut 5/16-18 Aluminum Anodized Red IMCA Modifieds Late Models

    Air Filter Nut 5/16-18 Aluminum Anodized Red IMCA Modifieds Late Models

    J J MOTORSPORTS

    $12.95
    Securing your air filter assembly with quality hardware ensures consistent carburetor sealing and prevents mid-race vibration-induced loosening that can compromise engine performance. This anodized aluminum stud nut delivers the durability and precision...
    RCFL-0012
    SKU:
    RCFL-0012
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    $12.95
    Qty in Cart: 0
    Quantity:
    Price:
    $12.95
    Subtotal:
  • J J MOTORSPORTS Air Filter Nut 5/16-18 Aluminum Anodized Black IMCA Modifieds Late Models J J MOTORSPORTS Air Filter Nut 5/16-18 Aluminum Anodized Black IMCA Modifieds Late Models

    Air Filter Nut 5/16-18 Aluminum Anodized Black IMCA Modifieds Late Models

    J J MOTORSPORTS

    $12.95
    Securing your air filter assembly requires hardware that matches the precision of your racing engine. This 5/16-18 aluminum nut delivers reliable fastening for four-barrel carburetors while keeping weight minimal—critical on track where every fraction of...
    RCFL-0011
    SKU:
    RCFL-0011
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    $12.95
    Qty in Cart: 0
    Quantity:
    Price:
    $12.95
    Subtotal:
  • Offset Stud 5/16-18  ALL26053

    Allstar Performance Offset Stud 5/16-18 ALL26053

    ALLSTAR PERFORMANCE

    $7.99
    The offset design of this Allstar stud positions your air cleaner assembly with precision, eliminating awkward fitment compromises and ensuring optimal airflow path geometry. A properly secured air cleaner mounting point prevents vibration-induced...
    ALL26053
    SKU:
    ALL26053
    Availability:
    Ships Same Business Day
    Weight:
    0.22 LBS
    $7.99
    Qty in Cart: 0
    Quantity:
    Price:
    $7.99
    Subtotal:
  • Air Cleaner Nut 5/16in Thread WEHWM273125

    Wehrs Air Cleaner Nut 5/16in Thread WEHWM273125

    WEHRS MACHINE

    $16.00
    A secure air cleaner assembly depends on reliable fastening hardware that won't vibrate loose under engine load. Wehrs' thumb screw design eliminates the need for tools, letting you make quick adjustments to your air filter housing without breaking your...
    WEHWM273125
    SKU:
    WEHWM273125
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    MFG Part #:
    WM273125
    $16.00
    Qty in Cart: 0
    Quantity:
    Price:
    $16.00
    Subtotal:
  • Air Cleaner Nut 1/4in Thread WEHWM27250

    Wehrs Air Cleaner Nut 1/4in Thread WEHWM27250

    WEHRS MACHINE

    $16.00
    A secure air cleaner assembly starts with precision hardware. This Wehrs thumb screw nut ensures your air filter remains firmly seated under all conditions—whether you're at the track or pushing hard on the street. The black anodized aluminum...
    WEHWM27250
    SKU:
    WEHWM27250
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    MFG Part #:
    WM27250
    $16.00
    Qty in Cart: 0
    Quantity:
    Price:
    $16.00
    Subtotal:
  • Rocker Arm Stud Kit SBC 8 pcs ALL90230

    Allstar Performance Rocker Arm Stud Kit SBC 8 pcs ALL90230

    ALLSTAR PERFORMANCE

    $13.69
    Rocker arm studs are critical fastening points that anchor your rocker arms to the cylinder head—and inferior studs will loosen, slip, or fail under high RPM and valve spring pressure. The Allstar Performance ALL90230 kit delivers proven reliability with...
    ALL90230
    SKU:
    ALL90230
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    MFG Part #:
    ALL90230
    $13.69
    Qty in Cart: 0
    Quantity:
    Price:
    $13.69
    Subtotal:
  • Intake Bolt Kit SBC 12PT 12pk ALL87010

    Allstar Performance Intake Bolt Kit SBC 12PT 12pk ALL87010

    ALLSTAR PERFORMANCE

    $18.99
    Your intake manifold bolts are critical fasteners that secure one of the most important assemblies on your engine—and factory hardware often fails under sustained heat and vibration. Allstar Performance's 12-point intake bolt kit replaces worn or...
    ALL87010
    SKU:
    ALL87010
    Availability:
    Ships Same Business Day
    Weight:
    0.61 LBS
    MFG Part #:
    ALL87010
    $18.99
    Qty in Cart: 0
    Quantity:
    Price:
    $18.99
    Subtotal:
  • Valve Cover Hold Down Nuts 1/4in-20 Thread 4pk ALL26320

    Allstar Performance Valve Cover Hold Down Nuts 1/4in-20 Thread 4pk ALL26320

    ALLSTAR PERFORMANCE

    $34.99
    Keep your valve covers locked down tight with these precision-crafted hold-down nuts from Allstar Performance — a brand that serious racers and weekend builders trust. With a clean chrome finish and solid steel construction, they'll look just as good as...
    ALL26320
    SKU:
    ALL26320
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    ALL26320
    $34.99
    Qty in Cart: 0
    Quantity:
    Price:
    $34.99
    Subtotal:
  • Air Cleaner Stud Straight Steel ALL26055

    Allstar Performance Air Cleaner Stud Straight Steel ALL26055

    ALLSTAR PERFORMANCE

    $19.99
    Keep your air cleaner locked down tight with the Allstar Performance Air Cleaner Stud (ALL26055) — a no-nonsense, heavy-duty solution built for serious racers and performance enthusiasts. Crafted from tough chromoly steel, this stud delivers the strength...
    ALL26055
    SKU:
    ALL26055
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    MFG Part #:
    ALL26055
    $19.99
    Qty in Cart: 0
    Quantity:
    Price:
    $19.99
    Subtotal:
  • Air Cleaner Stud Straight Aluminum ALL26054

    Allstar Performance Air Cleaner Stud Straight Aluminum ALL26054

    ALLSTAR PERFORMANCE

    $15.99
    Keep your air cleaner locked down and looking clean with the Allstar Performance Air Cleaner Stud (ALL26054) — a simple, reliable solution built for racers and enthusiasts who demand precision fitment every time. Crafted from lightweight aluminum, this...
    ALL26054
    SKU:
    ALL26054
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MFG Part #:
    ALL26054
    $15.99
    Qty in Cart: 0
    Quantity:
    Price:
    $15.99
    Subtotal:
  • O-Ring Carb Nut Short 5/16-18 ALL26047

    Allstar Performance O-Ring Carb Nut Short 5/16-18 ALL26047

    ALLSTAR PERFORMANCE

    $10.99
    Keep your air cleaner locked down in style with the Allstar Performance O-Ring Carb Nut. Machined from lightweight aluminum with a sleek black anodized finish, this short carb nut delivers a clean, professional look while providing a secure,...
    ALL26047
    SKU:
    ALL26047
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MFG Part #:
    ALL26047
    $10.99
    Qty in Cart: 0
    Quantity:
    Price:
    $10.99
    Subtotal:
  • O-Ring Carb Nut Tall 1/4-20 ALL26046

    Allstar Performance O-Ring Carb Nut Tall 1/4-20 ALL26046

    ALLSTAR PERFORMANCE

    $11.99
    Keep your air cleaner locked down tight with the Allstar Performance O-Ring Carb Nut Tall (ALL26046) — a sleek, race-proven solution that combines a secure seal with a clean, finished look under the hood. The built-in O-ring design eliminates annoying...
    ALL26046
    SKU:
    ALL26046
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    ALL26046
    $11.99
    Qty in Cart: 0
    Quantity:
    Price:
    $11.99
    Subtotal:
  • bolt down kit - ford distributor cap 8499

    MSD Distributor Cap Bolt Down Kit for Ford Style Caps 8499

    MSD IGNITION

    $81.05
    Engine vibration in high-performance applications can loosen traditional spring-clip distributor caps, causing inconsistent spark delivery and ignition timing issues. The MSD Bolt Down Kit replaces unreliable clips with a secure fastening system, keeping...
    MSD8499
    SKU:
    MSD8499
    Availability:
    Ships Same Business Day
    Weight:
    0.16 LBS
    $81.05
    Qty in Cart: 0
    Quantity:
    Price:
    $81.05
    Subtotal:
  • oil pan bolt kit - sbc 38551

    Moroso Oil Pan Bolt Kit - SBC 38551

    MOROSO

    $22.99
    Stock oil pan bolts are often the first thing to fail under sustained high RPM or boost, leading to costly leaks and engine damage. The Moroso Grade 8 bolt kit replaces those weak fasteners with hardened steel hardware designed to handle serious power...
    MOR38551
    SKU:
    MOR38551
    Availability:
    Ships Same Business Day
    Weight:
    0.28 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $22.99
    Subtotal:
  • cylinder head bolt kit chevy ls engines 17800568

    Chevrolet Performance Cylinder Head Bolt Kit Chevy LS Engines 17800568

    CHEVROLET PERFORMANCE

    $42.86
    Proper cylinder head bolt torque is critical to LS engine reliability—factory fasteners can stretch and lose clamping force over time, especially under boost or high RPM. This OEM-specification bolt kit from Chevrolet Performance restores your engine to...
    GMP17800568
    SKU:
    GMP17800568
    Availability:
    Ships Same Business Day
    Weight:
    2.05 LBS
    $42.86
    Qty in Cart: 0
    Quantity:
    Price:
    $42.86
    Subtotal:
  • 1/4-20 torx bolt - for cam retainer plate sbc 14093637

    Chevrolet Performance 1/4-20 Torx Bolt - for Cam Retainer Plate SBC 14093637

    CHEVROLET PERFORMANCE

    $2.99
    The cam retainer plate is critical to maintaining crankshaft timing accuracy and engine stability at high RPM. A compromised or missing fastener here can result in timing slip, valve float, and catastrophic engine failure. This OEM-specification...
    GMP14093637
    SKU:
    GMP14093637
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    $2.99
    Qty in Cart: 0
    Quantity:
    Price:
    $2.99
    Subtotal:
  • main cap bolt ls series inner 6-bolt w/tray stud 12560273

    Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt w/Tray Stud 12560273

    CHEVROLET PERFORMANCE

    $10.49
    When you're building or rebuilding an LS engine, the integrity of your main cap bolts directly impacts block stability and power transfer. OEM-quality fasteners like this Chevrolet Performance main cap bolt ensure you're not compromising durability when...
    GMP12560273
    SKU:
    GMP12560273
    Availability:
    Ships Same Business Day
    Weight:
    0.14 LBS
    $10.49
    Qty in Cart: 0
    Quantity:
    Price:
    $10.49
    Subtotal:
  • main cap bolt ls series inner 6-bolt 12560272

    Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt 12560272

    CHEVROLET PERFORMANCE

    $7.49
    Engine block integrity depends on quality fasteners, and OEM-spec main cap bolts are non-negotiable for reliable power delivery. This Chevrolet Performance bolt is engineered to maintain clamping force under extreme cylinder pressures, ensuring your LS...
    GMP12560272
    SKU:
    GMP12560272
    Availability:
    Ships Same Business Day
    Weight:
    0.13 LBS
    $7.49
    Qty in Cart: 0
    Quantity:
    Price:
    $7.49
    Subtotal:
  • cam bolt - ls1/ls2/ls6 & ls7 12556127

    Chevrolet Performance Cam Bolt - LS1/LS2/LS6 & LS7 12556127

    CHEVROLET PERFORMANCE

    $5.59
    A properly secured camshaft is non-negotiable for LS engine reliability and performance. This OEM Chevrolet cam bolt ensures your valvetrain stays locked in perfect timing, preventing the catastrophic failures that come from loose hardware during...
    GMP12556127
    SKU:
    GMP12556127
    Availability:
    Ships Same Business Day
    Weight:
    0.04 LBS
    $5.59
    Qty in Cart: 0
    Quantity:
    Price:
    $5.59
    Subtotal:
  • head stud kit 12pt dart ls next aluminum block 66120028b

    Dart Head Stud Kit 12pt Dart LS Next Aluminum Block 66120028B

    DART

    $791.24
    Head studs are the foundation of reliable cylinder head clamping, and the Dart Head Stud Kit delivers the clamping force your LS engine needs under extreme boost, nitrous, or high-RPM conditions. Unlike factory bolts, chromoly studs resist stretch and...
    DRT66120028B
    SKU:
    DRT66120028B
    Availability:
    Ships Same Business Day
    Weight:
    5.50 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $791.24
    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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