Main Cap Fastener Kits
Circle Track Main Cap Fastener Kits at JJ Motorsports
Main Cap Fastener Kits are critical for maintaining crankshaft alignment in circle track racing engines, offering rugged bolts and studs engineered to withstand high-pressure forces during races. These kits ensure unwavering reliability when used with other engine stabilization components.
Shop trusted brands like Chevrolet Performance for LS series bolts, ARP for SBF main stud kits. Explore related categories such as Engine Fastener Kits for complete hardware solutions or Circle Track Oiling Systems for lubrication upgrades.
Top Circle Track Main Cap Fastener Kits
- Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt w/Tray Stud 12560273 – Main Bolt with Hex Head for 6-Bolt Mains, made of Steel with Black Oxide finish, designed for GM LS-Series engines in circle track applications.
- ARP SBF 351 Dart SHP Main Stud Kit 154-5613 – Main Stud Kit including Hex Nuts for 4-Bolt Mains, constructed from Chromoly with Black Oxide finish, compatible with Dart SHP and Small Block Ford engines for enhanced circle track performance.
- ARP SBF Main Stud Kit 254-5601 – SBF Main Stud Kit with 1/2 in Studs and Hex Nuts for 4-Bolt Mains, made from Chromoly with Black Oxide finish, suitable for R Block Small Block Ford applications in racing engines.
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
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Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt w/Tray Stud 12560273
CHEVROLET PERFORMANCE
$10.49When 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 -
Chevrolet Performance Main Cap Bolt LS Series Inner 6-Bolt 12560272
CHEVROLET PERFORMANCE
$7.49Engine 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 -
ARP SBF 351 Dart SHP Main Stud Kit 154-5613
ARP
$116.99If you're building or rebuilding a Small Block Ford 351 with a Dart SHP block, main studs are non-negotiable for reliability under sustained high rpm and boost. ARP's chromoly studs eliminate the weak point of factory bolts, providing superior clamping...ARP154-5613- SKU:
- ARP154-5613
- Availability:
- Ships Same Business Day
- Weight:
- 4.11 LBS
$116.99 -
ARP SBF Main Stud Kit 254-5601
ARP
$99.99Engine block failures under high load often trace back to inadequate fastening at the mains—where crankshaft loads are most severe. ARP's 4130 chromoly main studs replace factory bolts with superior clamping force and fatigue resistance, critical for any...ARP254-5601- SKU:
- ARP254-5601
- Availability:
- Ships Same Business Day
- Weight:
- 3.79 LBS
- MFG Part #:
- 254-5601
$99.99 -
ARP SBF Main Stud Kit 254-5501
ARP
$101.99If you're building or rebuilding a high-performance Small Block Ford engine, factory fasteners won't cut it. The ARP SBF Main Stud Kit 254-5501 replaces those fasteners with chromoly studs engineered to handle the increased pressures and vibrations of...ARP254-5501- SKU:
- ARP254-5501
- Availability:
- Ships Same Business Day
- Weight:
- 2.64 LBS
- MFG Part #:
- 254-5501
$101.99 -
ARP SBC Main Stud Kit 234-5801
ARP
$133.99Main stud kits are critical upgrades for any SBC engine that sees regular boost, nitrous, or high RPM use—stock bolts simply cannot handle the increased cylinder pressures. ARP's 234-5801 kit replaces factory fasteners with chromoly studs that maintain...ARP234-5801- SKU:
- ARP234-5801
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- MFG Part #:
- 234-5801
$133.99 -
ARP SBC Main Stud Kit - Dart Little M Block 234-5609
ARP
$99.99A quality main stud kit is fundamental to block integrity under high-load conditions—whether you're building a naturally aspirated screamer or planning forced-induction upgrades. The ARP SBC Main Stud Kit for Dart Little M blocks delivers the clamping...ARP234-5609- SKU:
- ARP234-5609
- Availability:
- Ships Same Business Day
- Weight:
- 3.43 LBS
- MFG Part #:
- 234-5609
$99.99 -
ARP SBC Main Stud Kit 234-5606
ARP
$184.99A properly secured crankshaft is non-negotiable for any Small Block Chevy engine that sees real power. Factory bolts flex under high load, risking catastrophic failure—ARP studs eliminate that weakness with superior clamping force and consistency. This...ARP234-5606- SKU:
- ARP234-5606
- Availability:
- Ships Same Business Day
- Weight:
- 3.64 LBS
- MFG Part #:
- 234-5606
$184.99 -
ARP SBC Main Stud Kit 234-5604
ARP
$109.99A stock Small Block Chevy engine's main studs are often the first component to fail under high boost or sustained power levels, leading to catastrophic bearing failure and block damage. The ARP SBC Main Stud Kit 234-5604 replaces those vulnerable...ARP234-5604- SKU:
- ARP234-5604
- Availability:
- Ships Same Business Day
- Weight:
- 3.22 LBS
- MFG Part #:
- 234-5604
$109.99Qty in Cart: 0Quantity:Price:$109.99Subtotal: -
ARP SBC Main Stud Kit 234-5603
ARP
$109.99If you're building a serious Small Block Chevy engine—whether for the strip, the track, or a high-horsepower street build—factory main bolts aren't going to cut it. The ARP SBC Main Stud Kit 234-5603 replaces those bolts with premium chromoly studs that...ARP234-5603- SKU:
- ARP234-5603
- Availability:
- Ships Same Business Day
- Weight:
- 3.39 LBS
- MFG Part #:
- 234-5603
$109.99 -
ARP SBC Main Stud Kit 234-5602
ARP
$103.99A strong block foundation is non-negotiable for any serious Small Block Chevy build. The ARP SBC Main Stud Kit 234-5602 replaces factory bolts with premium chromoly studs that provide superior clamping force and fatigue resistance—essential when you're...ARP234-5602- SKU:
- ARP234-5602
- Availability:
- Ships Same Business Day
- Weight:
- 3.18 LBS
- MFG Part #:
- 234-5602
$103.99 -
ARP SBC Main Stud Kit 234-5601
ARP
$191.99Engine block failure under high boost or sustained RPM is catastrophic. The ARP SBC Main Stud Kit replaces factory bolts with premium chromoly studs that deliver superior clamping force and repeatability, keeping your small block anchored under extreme...ARP234-5601- SKU:
- ARP234-5601
- Availability:
- Ships Same Business Day
- Weight:
- 3.66 LBS
- MFG Part #:
- 234-5601
$191.99 -
ARP SBC Main Stud Kit 234-5503
ARP
$72.99SBC engine builders and racers know that factory main bolts are the weak link under high boost, nitrous, or sustained RPM loads. The ARP SBC Main Stud Kit 234-5503 replaces those bolts with chromoly studs engineered to handle the clamping loads your...ARP234-5503- SKU:
- ARP234-5503
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- MFG Part #:
- 234-5503
$72.99 -
ARP SBC Main Stud Kit 234-5501
ARP
$149.99A stock Small Block Chevy crankshaft is only as strong as its fasteners. The ARP SBC Main Stud Kit 234-5501 replaces vulnerable bolts with chromoly studs engineered to handle sustained high RPM loads, boost pressure, and the extreme forces of forced...ARP234-5501- SKU:
- ARP234-5501
- Availability:
- Ships Same Business Day
- Weight:
- 2.77 LBS
- MFG Part #:
- 234-5501
$149.99 -
ARP SBF Main Stud Kit - 351W Dart Iron Eagle Block 154-5607
ARP
$221.99When you're building a high-performance 351W engine on a Dart Iron Eagle block, your main studs are the foundation of reliability under boost, nitrous, or sustained high RPM. ARP's chromoly main stud kit replaces factory bolts with aerospace-grade...ARP154-5607- SKU:
- ARP154-5607
- Availability:
- Ships Same Business Day
- Weight:
- 4.35 LBS
- MFG Part #:
- 154-5607
$221.99 -
ARP SBF Main Stud Kit 154-5503
ARP
$115.99A properly secured main bearing assembly is non-negotiable for engine reliability, especially in high-RPM or forced induction applications. The ARP SBF Main Stud Kit 154-5503 replaces factory bolts with premium studs that resist stretch and fatigue,...ARP154-5503- SKU:
- ARP154-5503
- Availability:
- Ships Same Business Day
- Weight:
- 3.64 LBS
- MFG Part #:
- 154-5503
$115.99 -
ARP SBF Main Stud Kit 154-5410
ARP
$72.99Stock main bolts are the weak link in any high-performance Small Block Ford build. The ARP SBF Main Stud Kit 154-5410 replaces them with chromoly studs that provide superior clamping force and reliability under boost, nitrous, or high-RPM abuse. Whether...ARP154-5410- SKU:
- ARP154-5410
- Availability:
- Ships Same Business Day
- Weight:
- 2.44 LBS
- MFG Part #:
- 154-5410
$72.99 -
ARP SBF Main Stud Kit 154-5409
ARP
$88.99Stock main bolts can't handle the stress of high-output Small Block Ford engines—ARP's main stud kit replaces them with fasteners engineered to withstand extreme cylinder pressures and vibration. Whether you're building a street engine or prepping for...ARP154-5409- SKU:
- ARP154-5409
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- MFG Part #:
- 154-5409
$88.99 -
ARP SBF Main Stud Kit 154-5407
ARP
$74.99Factory main bolts are the weakest link in any high-output Small Block Ford engine—they stretch under load, compromise block integrity, and invite catastrophic failure. The ARP SBF Main Stud Kit 154-5407 replaces those marginal fasteners with chromoly...ARP154-5407- SKU:
- ARP154-5407
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- MFG Part #:
- 154-5407
$74.99 -
ARP SBF Main Stud Kit 154-5403
ARP
$86.99Stock main bolts flex under high cylinder pressures, compromising engine block integrity and risking catastrophic failure during sustained performance driving. ARP's chromoly stud kit replaces factory fasteners with precision-engineered hardware that...ARP154-5403- SKU:
- ARP154-5403
- Availability:
- Ships Same Business Day
- Weight:
- 3.23 LBS
- MFG Part #:
- 154-5403
$86.99
