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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
  • Main Stud Kit - SBF 302 Dart SHP Block ARP154-5612

    ARP Main Stud Kit - SBF 302 Dart SHP Block 154-5612

    ARP

    $117.99
    Main studs are the foundation of engine reliability under extreme load—especially critical when you're pushing a Small Block Ford beyond stock limits. The ARP Main Stud Kit for your Dart SHP block...
    ARP154-5612
    SKU:
    ARP154-5612
    Availability:
    Ships Same Business Day
    Weight:
    3.86 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $117.99
    Subtotal:
  • Mounting Bolt - 7/16 x 2-1/4 YTRYT6098

    Mounting Bolt - 7/16 x 2-1/4 YTRYT6098

    YELLA TERRA

    $5.99
    Rocker arm bolts are critical fasteners that secure your valve train under extreme combustion pressures and high RPM loads. A properly spec'd bolt prevents rocker arm walk, valve float, and...
    YTRYT6098
    SKU:
    YTRYT6098
    Availability:
    Ships Same Business Day
    Weight:
    0.08 LBS
    MFG Part #:
    YT6098
    $5.99
    Qty in Cart: 0
    Quantity:
    Price:
    $5.99
    Subtotal:
  • O-Ring Carb Nut Alum. 5/16-18 SWE901-10151

    Sweet O-Ring Carb Nut Alum. 5/16-18 901-10151

    SWEET

    $18.99
    A secure air cleaner assembly starts with a quality fastener that won't strip or loosen under vibration. This aluminum carb nut combines precision engineering with a reliable rubber seal to keep your...
    SWE901-10151
    SKU:
    SWE901-10151
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    MFG Part #:
    901-10151
    $18.99
    Qty in Cart: 0
    Quantity:
    Price:
    $18.99
    Subtotal:
  • Air Cleaner Nut / Seal 5/16in-18 SICCARB3002

    Air Cleaner Nut / Seal 5/16in-18 CARB3002

    SEALS-IT

    $13.99
    A secure air cleaner assembly starts with quality fastening—this 5/16-18 nut ensures your intake system stays sealed tight under boost and vibration. The included dirt plug seal prevents...
    SICCARB3002
    SKU:
    SICCARB3002
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    CARB3002
    $13.99
    Qty in Cart: 0
    Quantity:
    Price:
    $13.99
    Subtotal:
  • Ultra V/C Stud Kit Cast  MRG6329

    Mr. Gasket Ultra V/C Stud Kit Cast 6329

    MR. GASKET

    $34.72
    Valve cover fasteners endure constant thermal cycling and vibration—standard hardware simply won't cut it in a high-performance engine bay. The Mr. Gasket Ultra V/C Stud Kit delivers...
    MRG6329
    SKU:
    MRG6329
    Availability:
    Ships Same Business Day
    Weight:
    0.23 LBS
    MFG Part #:
    6329
    Qty in Cart: 0
    Quantity:
    Price:
    $34.72
    Subtotal:
  • Stud Kit - Valve Cover 8pk w/12pt Nuts 1/4-20 MOR68831

    Moroso Stud Kit - Valve Cover 8pk w/12pt Nuts 1/4-20 68831

    MOROSO

    $59.99
    Valve cover fasteners take a beating from vibration, heat cycles, and constant engine bay stress—stock studs and nuts often loosen or strip, leading to oil seepage and lost compression. The Moroso...
    MOR68831
    SKU:
    MOR68831
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MFG Part #:
    68831
    $59.99
    Qty in Cart: 0
    Quantity:
    Price:
    $59.99
    Subtotal:
  • Sbc Tray Install Kit  MIL81150

    Sbc Tray Install Kit 81150

    MILODON

    $118.95
    A quality windage tray installation requires the right hardware to secure it properly and prevent oil aeration in your Small Block Chevy. This kit gives you everything needed for a reliable, bolt-on...
    MIL81150
    SKU:
    MIL81150
    Availability:
    Ships Same Business Day
    Weight:
    1.75 LBS
    MFG Part #:
    81150
    $118.95
    Qty in Cart: 0
    Quantity:
    Price:
    $118.95
    Subtotal:
  • SBF Complete Engine Fastener Kit 6pt. ARP554-9803

    ARP SBF Complete Engine Fastener Kit 6pt. 554-9803

    ARP

    $111.99
    Engine assembly demands fasteners you can trust—substandard bolts fail under load, compromise seal integrity, and force costly rebuilds. ARP's SBF Complete Engine Fastener Kit eliminates guesswork by...
    ARP554-9803
    SKU:
    ARP554-9803
    Availability:
    Ships Same Business Day
    Weight:
    3.72 LBS
    MFG Part #:
    554-9803
    $111.99
    Qty in Cart: 0
    Quantity:
    Price:
    $111.99
    Subtotal:
  • SBF Complete Engine Fastener Kit 12pt. ARP554-9701

    ARP SBF Complete Engine Fastener Kit 12pt. 554-9701

    ARP

    $215.99
    A complete fastener kit eliminates the risk of mismatched hardware that can compromise engine reliability under load. ARP's chromoly construction and 12-point design provide superior clamping force...
    ARP554-9701
    SKU:
    ARP554-9701
    Availability:
    Ships Same Business Day
    Weight:
    5.04 LBS
    MFG Part #:
    554-9701
    $215.99
    Qty in Cart: 0
    Quantity:
    Price:
    $215.99
    Subtotal:
  • Ford S/S Oil Pan Stud Kit ARP454-1901

    ARP Ford S/S Oil Pan Stud Kit 454-1901

    ARP

    $96.99
    Oil pan fasteners are critical stress points in high-performance engines where vibration and heat cycling can cause standard hardware to loosen or corrode. ARP's stainless steel studs eliminate...
    ARP454-1901
    SKU:
    ARP454-1901
    Availability:
    Ships Same Business Day
    Weight:
    0.62 LBS
    MFG Part #:
    454-1901
    $96.99
    Qty in Cart: 0
    Quantity:
    Price:
    $96.99
    Subtotal:
  • S/S Starter 12pt Bolt Kit 3/8-16 x 4.400 UHL ARP430-3513

    ARP S/S Starter 12pt Bolt Kit 3/8-16 x 4.400 UHL 430-3513

    ARP

    $18.99
    High-torque starters demand fasteners that won't fail under extreme cranking loads. ARP's stainless steel bolt kit eliminates the risk of corrosion and fastener breakage on performance engines,...
    ARP430-3513
    SKU:
    ARP430-3513
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    MFG Part #:
    430-3513
    $18.99
    Qty in Cart: 0
    Quantity:
    Price:
    $18.99
    Subtotal:
  • S/S Header Stud Kit - 3/8in x 1.670in OAL (12) ARP400-1402

    ARP S/S Header Stud Kit - 3/8in x 1.670in OAL (12) 400-1402

    ARP

    $123.99
    Header studs are critical fasteners that endure extreme thermal cycling and vibration in high-performance engines—stock hardware often loosens or fails under sustained heat and boost. ARP's stainless...
    ARP400-1402
    SKU:
    ARP400-1402
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    MFG Part #:
    400-1402
    $123.99
    Qty in Cart: 0
    Quantity:
    Price:
    $123.99
    Subtotal:
  • SBF Head Stud Kit 12pt. ARP254-4314

    ARP SBF Head Stud Kit 12pt. 254-4314

    ARP

    $258.99
    Head studs provide superior clamping force and repeatability compared to traditional bolts, making them essential for any engine experiencing high boost pressure or sustained RPM loads. The ARP SBF...
    ARP254-4314
    SKU:
    ARP254-4314
    Availability:
    Ships Same Business Day
    Weight:
    6.19 LBS
    MFG Part #:
    254-4314
    $258.99
    Qty in Cart: 0
    Quantity:
    Price:
    $258.99
    Subtotal:
  • SBC Rod Bolt Kit - Fits 305/307/350 ARP234-6403

    ARP SBC Rod Bolt Kit - Fits 305/307/350 234-6403

    ARP

    $161.99
    Connecting rod bolts are critical stress components that experience extreme loads during combustion and acceleration. Stock bolts can stretch or fail under high RPM or boost conditions, risking...
    ARP234-6403
    SKU:
    ARP234-6403
    Availability:
    Ships Same Business Day
    Weight:
    1.43 LBS
    MFG Part #:
    234-6403
    $161.99
    Qty in Cart: 0
    Quantity:
    Price:
    $161.99
    Subtotal:
  • SBC Head Stud Kit 12pt. ARP234-4703

    ARP SBC Head Stud Kit 12pt. 234-4703

    ARP

    $271.99
    Stock head bolts are the weak link in any high-performance Small Block Chevy build. The ARP SBC Head Stud Kit 234-4703 replaces them with 4130 chromoly studs engineered to handle increased boost,...
    ARP234-4703
    SKU:
    ARP234-4703
    Availability:
    Ships Same Business Day
    Weight:
    5.87 LBS
    MFG Part #:
    234-4703
    Qty in Cart: 0
    Quantity:
    Price:
    $271.99
    Subtotal:
  • SBC Rod Bolt Kit - Fits 283-327 S/J Engines ARP134-6401

    ARP SBC Rod Bolt Kit - Fits 283-327 S/J Engines 134-6401

    ARP

    $82.99
    Stock connecting rod bolts are a critical weak point under high load and elevated RPM—factory fasteners simply can't handle the clamping force demands of a performance engine. ARP's High Performance...
    ARP134-6401
    SKU:
    ARP134-6401
    Availability:
    Ships Same Business Day
    Weight:
    1.29 LBS
    MFG Part #:
    134-6401
    $82.99
    Qty in Cart: 0
    Quantity:
    Price:
    $82.99
    Subtotal:
  • SBC Main Stud Kit  ARP134-5401

    ARP SBC Main Stud Kit 134-5401

    ARP

    $71.99
    When you're building or rebuilding a Small Block Chevy engine, your main studs are the foundation of reliability under extreme load. ARP's chromoly main stud kit delivers the clamping force and...
    ARP134-5401
    SKU:
    ARP134-5401
    Availability:
    Ships Same Business Day
    Weight:
    2.44 LBS
    MFG Part #:
    134-5401
    $71.99
    Qty in Cart: 0
    Quantity:
    Price:
    $71.99
    Subtotal:
  • SBC Head Bolt Kit 6pt. ARP134-3601

    ARP SBC Head Bolt Kit 6pt. 134-3601

    ARP

    $91.99
    OEM head bolts can stretch and fail under high RPM and boost conditions, compromising cylinder head sealing and risking catastrophic engine damage. ARP's chromoly construction and superior clamping...
    ARP134-3601
    SKU:
    ARP134-3601
    Availability:
    Ships Same Business Day
    Weight:
    4.95 LBS
    MFG Part #:
    134-3601
    $91.99
    Qty in Cart: 0
    Quantity:
    Price:
    $91.99
    Subtotal:
  • Valve Cover Hold Down Nuts 1/4in-28 Thread 4pk ALL26322

    Allstar Performance Valve Cover Hold Down Nuts 1/4in-28 Thread 4pk ALL26322

    ALLSTAR PERFORMANCE

    $34.99
    Keep your valve covers locked down tight and looking sharp with Allstar Performance's chrome hold-down nuts — a simple upgrade that blends function with clean, classic style. Engineered for a secure...
    ALL26322
    SKU:
    ALL26322
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    MFG Part #:
    ALL26322
    $34.99
    Qty in Cart: 0
    Quantity:
    Price:
    $34.99
    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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