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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
  • Chevy/Ford Rocker Arm Stud Kit (2) ARP100-7121

    ARP Chevy/Ford Rocker Arm Stud Kit (2) 100-7121

    ARP

    $15.99
    Rocker arm studs endure extreme valvetrain stress during high-RPM operation, and stock fasteners often fail under sustained performance demands. ARP's chromoly construction and precise threading specifications ensure reliable clamping force and eliminate...
    ARP100-7121
    SKU:
    ARP100-7121
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    MFG Part #:
    100-7121
    $15.99
    Qty in Cart: 0
    Quantity:
    Price:
    $15.99
    Subtotal:
  • Chevy/Ford Rocker Arm Stud Kit (16) ARP100-7101

    ARP Chevy/Ford Rocker Arm Stud Kit (16) 100-7101

    ARP

    $68.99
    Rocker arm studs are critical fasteners that experience extreme stress from valve train pressure and combustion forces. A quality stud kit prevents costly failures, valve float, and lost performance by maintaining precise rocker arm geometry under high...
    ARP100-7101
    SKU:
    ARP100-7101
    Availability:
    Ships Same Business Day
    Weight:
    2.00 LBS
    MFG Part #:
    100-7101
    $68.99
    Qty in Cart: 0
    Quantity:
    Price:
    $68.99
    Subtotal:
  • Header Stud Kit - 6pt. 3/8 x 1.670 OAL (12) ARP100-1412

    ARP Header Stud Kit - 6pt. 3/8 x 1.670 OAL (12) 100-1412

    ARP

    $54.99
    Stock header studs are prone to stripping and seizing under high-heat cycling, compromising your exhaust seal and risking catastrophic gasket failure. ARP's 4130 chromoly studs with black oxide finish provide superior tensile strength and corrosion...
    ARP100-1412
    SKU:
    ARP100-1412
    Availability:
    Ships Same Business Day
    Weight:
    0.87 LBS
    MFG Part #:
    100-1412
    $54.99
    Qty in Cart: 0
    Quantity:
    Price:
    $54.99
    Subtotal:
  • Header Stud Kit - 12pt. 3/8 x 1.670 OAL (12) ARP100-1402

    ARP Header Stud Kit - 12pt. 3/8 x 1.670 OAL (12) 100-1402

    ARP

    $67.99
    Header studs are critical fasteners that secure your exhaust manifold to the cylinder head, and they experience extreme thermal cycling and vibration in high-performance applications. Factory bolts can stretch, loosen, or fail under sustained heat and...
    ARP100-1402
    SKU:
    ARP100-1402
    Availability:
    Ships Same Business Day
    Weight:
    0.81 LBS
    MFG Part #:
    100-1402
    $67.99
    Qty in Cart: 0
    Quantity:
    Price:
    $67.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x 1.00 UHL (16) ARP100-1210

    ARP Header Bolt Kit - 12pt. 3/8 x 1.00 UHL (16) 100-1210

    ARP

    $30.99
    Stock header bolts fail under sustained heat and vibration cycles, leading to exhaust leaks and costly engine damage. ARP's chromoly construction and precise engineering deliver the clamping force and reliability required for forced induction, turbo, and...
    ARP100-1210
    SKU:
    ARP100-1210
    Availability:
    Ships Same Business Day
    Weight:
    0.68 LBS
    MFG Part #:
    100-1210
    $30.99
    Qty in Cart: 0
    Quantity:
    Price:
    $30.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x 1.00 UHL (12) ARP100-1209

    ARP Header Bolt Kit - 12pt. 3/8 x 1.00 UHL (12) 100-1209

    ARP

    $23.99
    Header bolts endure extreme thermal cycling and vibration—factory fasteners often loosen or fail under sustained high RPM operation. ARP's chromoly construction with black oxide finish resists corrosion and galling, ensuring reliable clamping force cycle...
    ARP100-1209
    SKU:
    ARP100-1209
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    MFG Part #:
    100-1209
    $23.99
    Qty in Cart: 0
    Quantity:
    Price:
    $23.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x .750 UHL (16) ARP100-1208

    ARP Header Bolt Kit - 12pt. 3/8 x .750 UHL (16) 100-1208

    ARP

    $21.99
    Header bolts endure extreme thermal cycling and vibration—factory fasteners often fail under boost or high RPM, leading to exhaust leaks and lost power. ARP's chromoly construction with black oxide coating resists corrosion and maintains clamp load where...
    ARP100-1208
    SKU:
    ARP100-1208
    Availability:
    Ships Same Business Day
    Weight:
    0.57 LBS
    MFG Part #:
    100-1208
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) ARP100-1207

    ARP Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) 100-1207

    ARP

    $25.99
    Header bolts endure extreme heat cycling and exhaust gas pressures that quickly degrade standard fasteners, leading to leaks and lost performance. ARP's chromoly construction with black oxide finish resists corrosion and thermal stress far better than...
    ARP100-1207
    SKU:
    ARP100-1207
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    MFG Part #:
    100-1207
    $25.99
    Qty in Cart: 0
    Quantity:
    Price:
    $25.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) ARP100-1203

    ARP Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) 100-1203

    ARP

    $31.99
    Factory header bolts are prone to stripping, corrosion, and failure under heat cycling—compromising both performance and reliability. ARP's chromoly construction with black oxide finish resists galling and maintains clamping force through repeated heat...
    ARP100-1203
    SKU:
    ARP100-1203
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    MFG Part #:
    100-1203
    $31.99
    Qty in Cart: 0
    Quantity:
    Price:
    $31.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x .750 UHL (16) ARP100-1202

    ARP Header Bolt Kit - 12pt. 3/8 x .750 UHL (16) 100-1202

    ARP

    $22.99
    Factory header bolts are a common failure point under high heat and vibration, leading to exhaust leaks and lost power at the worst possible moments. ARP's chromoly header bolts are engineered to handle sustained high-temperature cycling without...
    ARP100-1202
    SKU:
    ARP100-1202
    Availability:
    Ships Same Business Day
    Weight:
    0.65 LBS
    MFG Part #:
    100-1202
    $22.99
    Qty in Cart: 0
    Quantity:
    Price:
    $22.99
    Subtotal:
  • Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) ARP100-1201

    ARP Header Bolt Kit - 12pt. 3/8 x .750 UHL (12) 100-1201

    ARP

    $17.99
    Stock header bolts are a common failure point under sustained heat and cylinder pressure, leading to exhaust leaks and lost performance. ARP's chromoly fasteners are engineered to withstand extreme temperatures and vibration without loosening or...
    ARP100-1201
    SKU:
    ARP100-1201
    Availability:
    Ships Same Business Day
    Weight:
    0.51 LBS
    MFG Part #:
    100-1201
    $17.99
    Qty in Cart: 0
    Quantity:
    Price:
    $17.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x 1.00 UHL (16) ARP100-1110

    ARP Header Bolt Kit - 6pt. 3/8 x 1.00 UHL (16) 100-1110

    ARP

    $26.99
    Header bolts are critical fastening points that experience extreme heat cycles and vibration—stock bolts can loosen or fail under sustained high RPM operation. ARP's chromoly construction with black oxide finish delivers the clamping force and corrosion...
    ARP100-1110
    SKU:
    ARP100-1110
    Availability:
    Ships Same Business Day
    Weight:
    0.67 LBS
    MFG Part #:
    100-1110
    $26.99
    Qty in Cart: 0
    Quantity:
    Price:
    $26.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x 1.00 UHL (12) ARP100-1109

    ARP Header Bolt Kit - 6pt. 3/8 x 1.00 UHL (12) 100-1109

    ARP

    $16.99
    Header bolts endure extreme heat cycles and vibration that quickly degrade standard fasteners, leading to leaks, misfires, and catastrophic header failure. ARP's chromoly construction with black oxide finish resists corrosion and thermal stress far...
    ARP100-1109
    SKU:
    ARP100-1109
    Availability:
    Ships Same Business Day
    Weight:
    0.52 LBS
    MFG Part #:
    100-1109
    $16.99
    Qty in Cart: 0
    Quantity:
    Price:
    $16.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x .750 UHL (16) ARP100-1108

    ARP Header Bolt Kit - 6pt. 3/8 x .750 UHL (16) 100-1108

    ARP

    $21.99
    Header bolts are a critical fastener that directly impacts exhaust manifold integrity and engine reliability. Cheap, low-grade bolts can stretch, loosen, or fail under thermal cycling and vibration—compromising your seal and risking exhaust leaks. ARP's...
    ARP100-1108
    SKU:
    ARP100-1108
    Availability:
    Ships Same Business Day
    Weight:
    0.57 LBS
    MFG Part #:
    100-1108
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) ARP100-1107

    ARP Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) 100-1107

    ARP

    $20.99
    Header bolts experience extreme thermal cycling and vibration during engine operation, making fastener quality non-negotiable for maintaining a reliable seal and preventing exhaust leaks. ARP's chromoly construction with black oxide finish resists...
    ARP100-1107
    SKU:
    ARP100-1107
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    MFG Part #:
    100-1107
    $20.99
    Qty in Cart: 0
    Quantity:
    Price:
    $20.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) ARP100-1103

    ARP Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) 100-1103

    ARP

    $25.99
    Header bolts are critical fasteners that experience extreme heat cycles and vibration—stock bolts can loosen or fail under sustained performance driving. ARP's chromoly construction with black oxide finish provides superior clamping force retention and...
    ARP100-1103
    SKU:
    ARP100-1103
    Availability:
    Ships Same Business Day
    Weight:
    0.53 LBS
    MFG Part #:
    100-1103
    $25.99
    Qty in Cart: 0
    Quantity:
    Price:
    $25.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x .750 UHL (16) ARP100-1102

    ARP Header Bolt Kit - 6pt. 3/8 x .750 UHL (16) 100-1102

    ARP

    $21.99
    Header bolts experience extreme thermal cycling and vibration stress—factory fasteners often loosen or fail under sustained high-RPM conditions. ARP's chromoly construction and precise engineering eliminate bolt creep, ensuring your header stays sealed...
    ARP100-1102
    SKU:
    ARP100-1102
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    MFG Part #:
    100-1102
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    Subtotal:
  • Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) ARP100-1101

    ARP Header Bolt Kit - 6pt. 3/8 x .750 UHL (12) 100-1101

    ARP

    $21.99
    Header bolts are critical fasteners that secure your manifold under extreme thermal and vibration stress—factory hardware simply can't handle sustained high-RPM conditions. ARP's chromoly construction with black oxide finish delivers the clamping force...
    ARP100-1101
    SKU:
    ARP100-1101
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    MFG Part #:
    100-1101
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    Subtotal:
  • Timing Cover Fasteners 10pk ALL99390

    Allstar Performance Timing Cover Fasteners 10pk ALL99390

    ALLSTAR PERFORMANCE

    $3.99
    A timing cover leak can compromise your engine's reliability and create a mess in the engine bay. These stainless steel fasteners deliver the corrosion resistance and precise fit your Small Block Chevy needs to keep your timing cover sealed tight...
    ALL99390
    SKU:
    ALL99390
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MFG Part #:
    ALL99390
    $3.99
    Qty in Cart: 0
    Quantity:
    Price:
    $3.99
    Subtotal:
  • Spark Plug Index Shims 14mm Small O.D. ALL96506

    Allstar Performance Spark Plug Index Shims 14mm Small O.D. ALL96506

    ALLSTAR PERFORMANCE

    $21.99
    Spark plug indexing is critical for optimizing combustion efficiency and maximizing ignition performance in high-performance engines. These Allstar shims allow precise electrode positioning relative to the combustion chamber, ensuring consistent flame...
    ALL96506
    SKU:
    ALL96506
    Availability:
    Ships Same Business Day
    Weight:
    0.04 LBS
    MFG Part #:
    ALL96506
    $21.99
    Qty in Cart: 0
    Quantity:
    Price:
    $21.99
    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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