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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
  • S/S Header Bolt Kit - 3/8 x .750 UHL (12) ARP400-1201

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (12) 400-1201

    ARP

    $23.99
    Factory header bolts are prone to seizing and corrosion, compromising your exhaust system's integrity and making future service a nightmare. ARP's stainless steel header bolts eliminate this problem while delivering superior clamping force and...
    ARP400-1201
    SKU:
    ARP400-1201
    Availability:
    Ships Same Business Day
    Weight:
    0.52 LBS
    MFG Part #:
    400-1201
    $23.99
    Qty in Cart: 0
    Quantity:
    Price:
    $23.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x 1.00 UHL (16) ARP400-1110

    ARP S/S Header Bolt Kit - 3/8 x 1.00 UHL (16) 400-1110

    ARP

    $49.99
    Header bolts are a critical fastening point in any exhaust manifold assembly—they need to withstand extreme heat cycles and vibration without loosening or failing. ARP's stainless steel construction and polished finish resist corrosion while maintaining...
    ARP400-1110
    SKU:
    ARP400-1110
    Availability:
    Ships Same Business Day
    Weight:
    0.68 LBS
    MFG Part #:
    400-1110
    $49.99
    Qty in Cart: 0
    Quantity:
    Price:
    $49.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x 1.00 UHL (12) ARP400-1109

    ARP S/S Header Bolt Kit - 3/8 x 1.00 UHL (12) 400-1109

    ARP

    $35.99
    Header bolts are critical fasteners that demand corrosion resistance and reliability under extreme heat cycling—ARP's stainless steel construction delivers both. A quality bolt kit eliminates the risk of seized or failed fasteners that can compromise...
    ARP400-1109
    SKU:
    ARP400-1109
    Availability:
    Ships Same Business Day
    Weight:
    0.52 LBS
    MFG Part #:
    400-1109
    $35.99
    Qty in Cart: 0
    Quantity:
    Price:
    $35.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x .750 UHL (16) ARP400-1108

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (16) 400-1108

    ARP

    $45.99
    Header bolts are critical fasteners that secure your exhaust manifold under extreme thermal and vibrational stress. Cheap or corroded bolts fail prematurely, leading to exhaust leaks, lost power, and costly engine damage. ARP's stainless steel header...
    ARP400-1108
    SKU:
    ARP400-1108
    Availability:
    Ships Same Business Day
    Weight:
    0.57 LBS
    MFG Part #:
    400-1108
    $45.99
    Qty in Cart: 0
    Quantity:
    Price:
    $45.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x .750 UHL (12) ARP400-1107

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (12) 400-1107

    ARP

    $39.99
    Header bolts endure extreme heat cycling and vibration that standard fasteners simply cannot withstand—ARP's stainless steel construction ensures your headers stay secure without risk of bolt failure or exhaust leaks. These polished S/S bolts deliver...
    ARP400-1107
    SKU:
    ARP400-1107
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    MFG Part #:
    400-1107
    $39.99
    Qty in Cart: 0
    Quantity:
    Price:
    $39.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x .750 UHL (12) ARP400-1103

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (12) 400-1103

    ARP

    $46.99
    Header bolts are a critical fastening point in your exhaust system, and using OEM-grade or inferior fasteners invites corrosion, loosening, and catastrophic leaks under load. ARP's stainless steel header bolts eliminate these risks with superior material...
    ARP400-1103
    SKU:
    ARP400-1103
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    MFG Part #:
    400-1103
    $46.99
    Qty in Cart: 0
    Quantity:
    Price:
    $46.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x .750 UHL (16) ARP400-1102

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (16) 400-1102

    ARP

    $30.99
    Header bolts are one of the most overlooked wear items in high-performance engine builds, yet they're critical to maintaining exhaust manifold integrity under sustained heat and vibration. Factory fasteners often fail or loosen over extended racing...
    ARP400-1102
    SKU:
    ARP400-1102
    Availability:
    Ships Same Business Day
    Weight:
    0.65 LBS
    MFG Part #:
    400-1102
    $30.99
    Qty in Cart: 0
    Quantity:
    Price:
    $30.99
    Subtotal:
  • S/S Header Bolt Kit - 3/8 x .750 UHL (12) ARP400-1101

    ARP S/S Header Bolt Kit - 3/8 x .750 UHL (12) 400-1101

    ARP

    $23.99
    Header bolts are a critical fastening component that directly impacts exhaust system integrity and engine reliability. Stock bolts can corrode, seize, and fail under the thermal cycling stress of high-performance engines, compromising your header seal...
    ARP400-1101
    SKU:
    ARP400-1101
    Availability:
    Ships Same Business Day
    Weight:
    0.51 LBS
    MFG Part #:
    400-1101
    $23.99
    Qty in Cart: 0
    Quantity:
    Price:
    $23.99
    Subtotal:
  • Air Cleaner Stud Kit - 1/4 x 3.200 S/S ARP400-0306

    ARP Air Cleaner Stud Kit - 1/4 x 3.200 S/S 400-0306

    ARP

    $14.99
    OEM air cleaner studs are prone to corrosion and stripped threads under repeated assembly cycles—especially in high-heat engine bays. This ARP stainless steel stud kit delivers the reliability you need for consistent, vibration-free air cleaner mounting...
    ARP400-0306
    SKU:
    ARP400-0306
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    MFG Part #:
    400-0306
    $14.99
    Qty in Cart: 0
    Quantity:
    Price:
    $14.99
    Subtotal:
  • SBC Rocker Arm Stud Kit  ARP334-7204

    ARP SBC Rocker Arm Stud Kit 334-7204

    ARP

    $133.99
    Rocker arm studs endure extreme valve train stress during high-RPM operation, making factory hardware a common failure point in built engines. ARP's Pro Series studs replace weak OEM components with chromoly construction and precise thread...
    ARP334-7204
    SKU:
    ARP334-7204
    Availability:
    Ships Same Business Day
    Weight:
    2.10 LBS
    MFG Part #:
    334-7204
    $133.99
    Qty in Cart: 0
    Quantity:
    Price:
    $133.99
    Subtotal:
  • SBC Rocker Arm Stud Kit  ARP334-7203

    ARP SBC Rocker Arm Stud Kit 334-7203

    ARP

    $133.99
    Rocker arm studs are a critical foundation for valvetrain stability—especially under high RPM or forced induction conditions where stock fasteners can stretch or fail. The ARP SBC Rocker Arm Stud Kit 334-7203 delivers Pro Series construction with...
    ARP334-7203
    SKU:
    ARP334-7203
    Availability:
    Ships Same Business Day
    Weight:
    2.18 LBS
    MFG Part #:
    334-7203
    $133.99
    Qty in Cart: 0
    Quantity:
    Price:
    $133.99
    Subtotal:
  • SBC Rocker Arm Stud Kit  ARP334-7202

    ARP SBC Rocker Arm Stud Kit 334-7202

    ARP

    $134.99
    Rocker arm studs are critical fastening points in your valvetrain—inadequate clamping force leads to valve float, inconsistent timing, and power loss. The ARP SBC Rocker Arm Stud Kit 334-7202 uses premium chromoly construction and precision threading to...
    ARP334-7202
    SKU:
    ARP334-7202
    Availability:
    Ships Same Business Day
    Weight:
    2.23 LBS
    MFG Part #:
    334-7202
    $134.99
    Qty in Cart: 0
    Quantity:
    Price:
    $134.99
    Subtotal:
  • Rocker Arm Nut Kit - 7/16 (16) ARP300-8245

    ARP Rocker Arm Nut Kit - 7/16 (16) 300-8245

    ARP

    $84.99
    ARP rocker arm nuts are engineered to maintain consistent clamp load and prevent fastener loosening under the extreme vibration and thermal cycling of high-performance engines. Using chromoly construction with a black oxide finish, these nuts deliver the...
    ARP300-8245
    SKU:
    ARP300-8245
    Availability:
    Ships Same Business Day
    Weight:
    0.94 LBS
    MFG Part #:
    300-8245
    $84.99
    Qty in Cart: 0
    Quantity:
    Price:
    $84.99
    Subtotal:
  • Rocker Arm Nut Kit - 3/8 (16) ARP300-8243

    ARP Rocker Arm Nut Kit - 3/8 (16) 300-8243

    ARP

    $88.99
    Rocker arm nuts are a critical fastening point in your valvetrain, and using OEM hardware in high-performance applications is a recipe for failure. ARP's chromoly rocker arm nuts are engineered to withstand the extreme pressures and cyclic stress of...
    ARP300-8243
    SKU:
    ARP300-8243
    Availability:
    Ships Same Business Day
    Weight:
    1.11 LBS
    MFG Part #:
    300-8243
    $88.99
    Qty in Cart: 0
    Quantity:
    Price:
    $88.99
    Subtotal:
  • Rocker Arm Nut Kit - 7/16 (16) ARP300-8242

    ARP Rocker Arm Nut Kit - 7/16 (16) 300-8242

    ARP

    $88.99
    Rocker arm nuts endure constant mechanical stress and thermal cycling—factory fasteners often fail under high RPM conditions, leading to valve train instability and catastrophic engine damage. ARP's chromoly rocker arm nuts are engineered to withstand...
    ARP300-8242
    SKU:
    ARP300-8242
    Availability:
    Ships Same Business Day
    Weight:
    1.16 LBS
    MFG Part #:
    300-8242
    $88.99
    Qty in Cart: 0
    Quantity:
    Price:
    $88.99
    Subtotal:
  • Rocker Arm Nut Kit - 3/8 (16) ARP300-8241

    ARP Rocker Arm Nut Kit - 3/8 (16) 300-8241

    ARP

    $84.99
    Rocker arm nuts are a critical fastening component that directly impact valve train stability and engine reliability. Standard steel nuts can loosen under the extreme vibration and thermal cycling of high-performance or racing engines, leading to valve...
    ARP300-8241
    SKU:
    ARP300-8241
    Availability:
    Ships Same Business Day
    Weight:
    1.27 LBS
    MFG Part #:
    300-8241
    $84.99
    Qty in Cart: 0
    Quantity:
    Price:
    $84.99
    Subtotal:
  • Carburetor Stud Kit - 3.200 OAL ARP300-2408

    ARP Carburetor Stud Kit - 3.200 OAL 300-2408

    ARP

    $19.99
    Carburetor studs are often overlooked, but a quality fastening system directly impacts fuel delivery stability and prevents gasket creep under engine vibration and heat cycles. ARP's Pro Series Carburetor Stud Kit engineered from chromoly and finished in...
    ARP300-2408
    SKU:
    ARP300-2408
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    MFG Part #:
    300-2408
    Qty in Cart: 0
    Quantity:
    Price:
    $19.99
    Subtotal:
  • Chevy Cam Bolt Kit  ARP300-1001

    ARP Chevy Cam Bolt Kit 300-1001

    ARP

    $7.99
    Factory camshaft bolts are prone to stretching and failure under high RPM and boost conditions, compromising valve timing accuracy and risking catastrophic engine damage. ARP's Pro Series Cam Bolt Kit replaces those weak points with chromoly fasteners...
    ARP300-1001
    SKU:
    ARP300-1001
    Availability:
    Ships Same Business Day
    Weight:
    0.13 LBS
    MFG Part #:
    300-1001
    $7.99
    Qty in Cart: 0
    Quantity:
    Price:
    $7.99
    Subtotal:
  • BBF Cam Bolt Kit  ARP255-1001

    ARP BBF Cam Bolt Kit 255-1001

    ARP

    $4.99
    Factory cam bolts are prone to stretch and failure under sustained RPM and boost conditions, compromising camshaft timing stability and risking catastrophic engine damage. The ARP BBF Cam Bolt Kit delivers the clamping force and material integrity needed...
    ARP255-1001
    SKU:
    ARP255-1001
    Availability:
    Ships Same Business Day
    Weight:
    0.12 LBS
    MFG Part #:
    255-1001
    $4.99
    Qty in Cart: 0
    Quantity:
    Price:
    $4.99
    Subtotal:
  • SBF Rod Bolt Kit - Fits 289-302 w/5/16in ARP254-6402

    ARP SBF Rod Bolt Kit - Fits 289-302 w/5/16in 254-6402

    ARP

    $151.99
    Connecting rod bolts endure extreme loads and cyclic stress every engine revolution—stock fasteners are often the weakest link in a high-performance build. ARP's Pro Series rod bolt kit delivers the tensile strength and reliability needed to keep your...
    ARP254-6402
    SKU:
    ARP254-6402
    Availability:
    Ships Same Business Day
    Weight:
    1.00 LBS
    MFG Part #:
    254-6402
    $151.99
    Qty in Cart: 0
    Quantity:
    Price:
    $151.99
    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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