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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
  • Sb Chevy Intake Bolts  MRG955G

    Mr. Gasket Sb Chevy Intake Bolts 955G

    MR. GASKET

    $18.04
    A properly secured intake manifold is critical to maintaining consistent fuel delivery and preventing vacuum leaks that rob your engine of power and reliability. Mr. Gasket's intake bolt kit eliminates the risk of fastener failure with high-strength...
    MRG955G
    SKU:
    MRG955G
    Availability:
    Ships Same Business Day
    Weight:
    0.58 LBS
    MFG Part #:
    955G
    $18.04
    Qty in Cart: 0
    Quantity:
    Price:
    $18.04
    Subtotal:
  • Harmonic Balancer Bolt  MRG945G

    Mr. Gasket Harmonic Balancer Bolt 945G

    MR. GASKET

    $11.59
    A properly secured harmonic balancer is critical to engine stability and longevity—any slippage or fastener failure can cause timing issues and internal damage. This Mr. Gasket bolt is engineered with precision threads and cadmium plating to withstand...
    MRG945G
    SKU:
    MRG945G
    Availability:
    Ships Same Business Day
    Weight:
    0.37 LBS
    MFG Part #:
    945G
    $11.59
    Qty in Cart: 0
    Quantity:
    Price:
    $11.59
    Subtotal:
  • Aluminum Rocker Nuts  MRG923G

    Mr. Gasket Aluminum Rocker Nuts 923G

    MR. GASKET

    $101.95
    Rocker arm nuts are critical fastening components that secure your rocker arms under extreme valve train stress—loose or failing nuts can cause valve timing issues and catastrophic engine damage. Mr. Gasket's aluminum rocker nuts deliver the precision...
    MRG923G
    SKU:
    MRG923G
    Availability:
    Ships Same Business Day
    Weight:
    0.79 LBS
    MFG Part #:
    923G
    $101.95
    Qty in Cart: 0
    Quantity:
    Price:
    $101.95
    Subtotal:
  • Rocker Arm Nuts  MRG920G

    Mr. Gasket Rocker Arm Nuts 920G

    MR. GASKET

    $75.65
    Rocker arm nuts are critical fastening points in your valvetrain—loose or worn nuts will cause valve float, timing issues, and potential catastrophic engine damage. The Mr. Gasket 920G set delivers the precision fit and secure clamping force your stamped...
    MRG920G
    SKU:
    MRG920G
    Availability:
    Ships Same Business Day
    Weight:
    1.13 LBS
    MFG Part #:
    920G
    Qty in Cart: 0
    Quantity:
    Price:
    $75.65
    Subtotal:
  • Header Bolts 16 Per Set  MRG919G

    Mr. Gasket Header Bolts 16 Per Set 919G

    MR. GASKET

    $19.33
    Header bolts take tremendous heat and vibration in high-performance applications—factory fasteners often loosen or fail under sustained load. Mr. Gasket's 919G set delivers OEM-quality fasteners engineered for reliable clamping force, ensuring your...
    MRG919G
    SKU:
    MRG919G
    Availability:
    Ships Same Business Day
    Weight:
    0.65 LBS
    MFG Part #:
    919G
    $19.33
    Qty in Cart: 0
    Quantity:
    Price:
    $19.33
    Subtotal:
  • Header Bolts  MRG917

    Mr. Gasket Header Bolts 917

    MR. GASKET

    $18.77
    Header bolts are a critical fastening component that directly impacts exhaust system integrity and engine reliability. Mr. Gasket's 917 bolts are precision-engineered with black oxide coating to resist corrosion and heat cycling, ensuring your headers...
    MRG917
    SKU:
    MRG917
    Availability:
    Ships Same Business Day
    Weight:
    0.56 LBS
    MFG Part #:
    917
    $18.77
    Qty in Cart: 0
    Quantity:
    Price:
    $18.77
    Subtotal:
  • Header Bolts  MRG915

    Mr. Gasket Header Bolts 915

    MR. GASKET

    $10.56
    Header bolts are a critical fastening component that endures extreme heat cycles and vibration in high-performance applications. OEM fasteners often fail under sustained engine stress, leading to header leaks, power loss, and potential engine damage. Mr...
    MRG915
    SKU:
    MRG915
    Availability:
    Ships Same Business Day
    Weight:
    0.49 LBS
    MFG Part #:
    915
    $10.56
    Qty in Cart: 0
    Quantity:
    Price:
    $10.56
    Subtotal:
  • Head Bolt Washers 7/16in  MRG87

    Mr. Gasket Head Bolt Washers 7/16in 87

    MR. GASKET

    $26.33
    Proper head bolt washers are critical for distributing clamping force evenly across cylinder head surfaces, preventing bolt hole damage and ensuring consistent compression seal integrity. These Mr. Gasket washers provide the precision fit and durability...
    MRG87
    SKU:
    MRG87
    Availability:
    Ships Same Business Day
    Weight:
    0.31 LBS
    MFG Part #:
    87
    $26.33
    Qty in Cart: 0
    Quantity:
    Price:
    $26.33
    Subtotal:
  • Harmonic Balancer Bolt Ford MRG7847

    Mr. Gasket Harmonic Balancer Bolt Ford 7847

    MR. GASKET

    $45.16
    The harmonic balancer is critical to engine stability—it absorbs vibrations from your crankshaft and protects your entire drivetrain from premature wear and failure. A factory or worn bolt can slip under load, compromising balancer alignment and risking...
    MRG7847
    SKU:
    MRG7847
    Availability:
    Ships Same Business Day
    Weight:
    0.46 LBS
    MFG Part #:
    7847
    $45.16
    Qty in Cart: 0
    Quantity:
    Price:
    $45.16
    Subtotal:
  • SBC Harmonic Balancer Bolt MRG7845

    Mr. Gasket SBC Harmonic Balancer Bolt 7845

    MR. GASKET

    $32.23
    The harmonic balancer is critical to engine stability and longevity—it absorbs crankshaft vibration that can lead to premature bearing wear and component failure. A quality fastener here isn't optional; it's essential for reliable power delivery and...
    MRG7845
    SKU:
    MRG7845
    Availability:
    Ships Same Business Day
    Weight:
    0.37 LBS
    MFG Part #:
    7845
    $32.23
    Qty in Cart: 0
    Quantity:
    Price:
    $32.23
    Subtotal:
  • ULTRA V/C STUD KIT(STEEL  MRG6324

    Mr. Gasket ULTRA V/C STUD KIT(STEEL 6324

    MR. GASKET

    $29.84
    Valve cover studs are a critical fastening point that's often overlooked until failure occurs during high-RPM operation. The Mr. Gasket ULTRA V/C Stud Kit replaces weak factory fasteners with hardened steel studs and hex nuts that maintain clamp load...
    MRG6324
    SKU:
    MRG6324
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MFG Part #:
    6324
    $29.84
    Qty in Cart: 0
    Quantity:
    Price:
    $29.84
    Subtotal:
  • Carburetor Studs 2-1/2in  MRG62

    Mr. Gasket Carburetor Studs 2-1/2in 62

    MR. GASKET

    $11.73
    A solid carburetor mounting foundation is critical for fuel system reliability and engine performance. Mr. Gasket's carburetor studs eliminate vibration-induced fastener loosening and fuel leaks that can compromise your engine's consistency on the track...
    MRG62
    SKU:
    MRG62
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    MFG Part #:
    62
    $11.73
    Qty in Cart: 0
    Quantity:
    Price:
    $11.73
    Subtotal:
  • Carburetor Studs 2in  MRG61

    Mr. Gasket Carburetor Studs 2in 61

    MR. GASKET

    $13.82
    A loose or failing carburetor mounting is a common source of air leaks that compromise fuel mixture and throttle response. These Mr. Gasket studs provide a secure, reliable fastening point that resists vibration loosening and corrosion, ensuring your...
    MRG61
    SKU:
    MRG61
    Availability:
    Ships Same Business Day
    Weight:
    0.23 LBS
    MFG Part #:
    61
    $13.82
    Qty in Cart: 0
    Quantity:
    Price:
    $13.82
    Subtotal:
  • Intake Bolt Kit  MRG6091

    Mr. Gasket Intake Bolt Kit 6091

    MR. GASKET

    $28.31
    A quality intake manifold bolt kit is essential for maintaining a leak-free seal and ensuring consistent performance in your engine bay. The Mr. Gasket 6091 delivers hardened steel construction with a durable zinc oxide finish, designed to withstand the...
    MRG6091
    SKU:
    MRG6091
    Availability:
    Ships Same Business Day
    Weight:
    0.66 LBS
    MFG Part #:
    6091
    $28.31
    Qty in Cart: 0
    Quantity:
    Price:
    $28.31
    Subtotal:
  • Timing Cover Bolts  SB & BB Chevy MRG6090

    Mr. Gasket Timing Cover Bolts SB & BB Chevy 6090MRG

    MR. GASKET

    $15.61
    Timing cover bolts are critical fasteners that seal your engine's front end and prevent oil leakage at a high-stress junction. Factory bolts often corrode or strip over time, leading to messy leaks and potential engine damage. This Mr. Gasket hex-head...
    MRG6090
    SKU:
    MRG6090
    Availability:
    Ships Same Business Day
    Weight:
    0.18 LBS
    MFG Part #:
    6090MRG
    $15.61
    Qty in Cart: 0
    Quantity:
    Price:
    $15.61
    Subtotal:
  • Oil Pan Bolts  MRG6087

    Mr. Gasket Oil Pan Bolts 6087MRG

    MR. GASKET

    $35.59
    Oil pan bolts are a critical fastening point that endures constant thermal cycling and vibration in high-performance engines. Using a quality, purpose-built bolt kit like the Mr. Gasket 6087MRG ensures secure sealing and eliminates the risk of stripped...
    MRG6087
    SKU:
    MRG6087
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    MFG Part #:
    6087MRG
    $35.59
    Qty in Cart: 0
    Quantity:
    Price:
    $35.59
    Subtotal:
  • SB Chevy Oil Pan Bolts  MRG6085

    Mr. Gasket SB Chevy Oil Pan Bolts 6085MRG

    MR. GASKET

    $20.61
    A reliable oil pan bolt kit is critical to preventing leaks and maintaining engine integrity under racing and high-performance conditions. Mr. Gasket's SB Chevy Oil Pan Bolts deliver dependable fastening with corrosion-resistant construction, ensuring...
    MRG6085
    SKU:
    MRG6085
    Availability:
    Ships Same Business Day
    Weight:
    0.36 LBS
    MFG Part #:
    6085MRG
    $20.61
    Qty in Cart: 0
    Quantity:
    Price:
    $20.61
    Subtotal:
  • Sb Ford Intake Bolt Set  MRG6082

    Mr. Gasket Sb Ford Intake Bolt Set 6082MRG

    MR. GASKET

    $49.95
    Stock intake bolts are often the first casualty of high-rpm operation, prone to loosening and causing vacuum leaks that kill performance and fuel economy. This Mr. Gasket bolt set replaces OEM fasteners with purpose-built hardware engineered for small...
    MRG6082
    SKU:
    MRG6082
    Availability:
    Ships Same Business Day
    Weight:
    0.89 LBS
    MFG Part #:
    6082MRG
    $49.95
    Qty in Cart: 0
    Quantity:
    Price:
    $49.95
    Subtotal:
  • Intake Bolt Set  MRG6080

    Mr. Gasket Intake Bolt Set 6080MRG

    MR. GASKET

    $20.95
    A quality intake bolt set is foundational to a leak-free, properly sealed intake manifold—critical for maintaining boost pressure, fuel atomization, and consistent performance. Mr. Gasket's hex head design ensures even clamping force across your manifold...
    MRG6080
    SKU:
    MRG6080
    Availability:
    Ships Same Business Day
    Weight:
    0.89 LBS
    MFG Part #:
    6080MRG
    $20.95
    Qty in Cart: 0
    Quantity:
    Price:
    $20.95
    Subtotal:
  • Carburetor Studs 1-1/2in  MRG60

    Mr. Gasket Carburetor Studs 1-1/2in 60

    MR. GASKET

    $10.03
    Carburetor studs are a critical fastening component that directly impact manifold seal integrity and engine reliability. A quality stud set ensures consistent clamping force, prevents leakage, and eliminates the risk of stud failure under thermal cycling...
    MRG60
    SKU:
    MRG60
    Availability:
    Ships Same Business Day
    Weight:
    0.13 LBS
    MFG Part #:
    60
    $10.03
    Qty in Cart: 0
    Quantity:
    Price:
    $10.03
    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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