Fits 1996 and earlier Audi 5-cylinder engines.

The ARP 204-5409 Main Stud Kit is an essential upgrade for high-performance Audi 5-cylinder builds, providing the superior clamping force needed to maintain crankshaft alignment and prevent main cap movement. Unlike standard factory bolts that can stretch under the high cylinder pressures of turbocharged or high-RPM applications, these studs are engineered to ensure bottom-end stability and protect your engine bearings from premature wear.

Each fastener is manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi tensile strength. The threads are rolled after heat treatment, which significantly improves fatigue life compared to cheaper fasteners with cut threads. This kit replaces the original equipment main bolts with high-strength studs, precision-ground parallel washers, and 12-point nuts for a secure, even load distribution across the main caps.

• Manufacturer Part Number: 204-5409
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Design: 12-Point Nuts for easy access in tight spaces
• Includes: Main studs, washers, and nuts

Fits 2005-2009 Audi A4 and A4 Quattro models equipped with the 2.0L FSI 4-cylinder engine.

Ensure the structural integrity of your engine's bottom end with the ARP 204-5408 Main Stud Kit. Specifically engineered for high-performance VW/Audi 2.0L FSI applications, these studs provide the clamping force necessary to prevent main cap walk and crankshaft misalignment, which is critical in forced induction or high-RPM builds. Unlike factory torque-to-yield (TTY) bolts that must be discarded after a single use, these premium 8740 chrome moly studs are reusable and offer significantly higher fatigue strength.

• Manufactured from 8740 chrome moly steel for superior tensile strength
• Heat-treated to 200,000 psi to ensure maximum clamping force
• Centerless ground for perfect concentricity
• Threads rolled after heat treatment for 10x better fatigue life than cut threads
• Manufacturer Part Number: 204-5408
• Includes all necessary studs, parallel-ground washers, and 12-point nuts

Fits select 1981-1992 Audi 80, 90, 100, 200, 4000, 5000, Coupe, and Quattro models equipped with 5-cylinder engines.

Ensure the structural integrity of your engine's bottom end with the ARP Main Stud Kit. Designed to replace factory main bolts, these high-strength fasteners provide the superior clamping force necessary to prevent main cap walk and protect crankshaft alignment under high-load or high-RPM conditions. This kit is an essential upgrade for both stock rebuilds and performance builds where maintaining precise tolerances is critical.

• Specifically engineered for Audi 5-cylinder engine blocks to ensure proper thread engagement
• Provides consistent clamping force to eliminate main cap movement and fretting
• Manufactured from premium materials for exceptional fatigue strength and durability
• Complete kit includes all required studs, 12-point nuts, and hardened parallel-ground washers
• Manufacturer Part Number: 204-5404

Fits 1995-2005 Volkswagen Golf GTI and GTI VR6.

Protect your engine's bottom end with the ARP 204-5403 Main Stud Kit, a critical upgrade for any high-performance VR6 build. Unlike factory torque-to-yield bolts that stretch and must be discarded after one use, these ARP studs provide superior clamping force and consistent load distribution across the main caps. By using studs instead of bolts, you ensure the main caps are properly aligned and eliminate the risk of thread wear in the engine block during assembly.

This kit is essential for maintaining crankshaft alignment and preventing main cap walk in high-RPM or forced-induction applications. Each fastener is precision-manufactured to exacting tolerances to ensure reliability under extreme thermal and mechanical stress.

• Manufacturer Part Number: 204-5403
• Engine Fitment: Volkswagen VR6
• Application: 1995-2005 VW Golf GTI/GTI VR6
• Includes: High-strength main studs, parallel-ground washers, and 12-point nuts
• Benefit: Reusable fasteners with higher tensile strength than OE hardware

The ARP 204-5402 Main Stud Kit is a critical upgrade for any high-performance Volkswagen 4-cylinder water-cooled engine build. Designed to replace factory main bolts that are prone to stretching, these studs provide the superior clamping force necessary to prevent main cap walk and maintain crankshaft alignment under high-load or forced-induction conditions.

Each stud is manufactured from premium 8740 chrome moly steel and heat-treated to a 200,000 psi tensile strength rating. By using studs instead of bolts, you achieve more accurate torque loading on the main caps, as the fastener is not subjected to the twisting forces typically experienced during the tightening of a bolt. This ensures a more stable bottom end and extends the life of your main bearings.

• Fits Volkswagen 4-cylinder water-cooled engines
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Fastener Style: Studs with 12-point nuts
• Includes: Complete set of main studs, parallel-ground washers, and 12-point nuts
• Manufacturer Part Number: 204-5402

Note: Align-honing the main bore is highly recommended after installing main studs to ensure perfect concentricity of the crankshaft journals.

Fits 1999-2001 Porsche 911 Carrera (996).

Protect your engine's bottom end with the ARP Main Bolt Kit (204-5001). These high-strength fasteners are designed to provide superior clamping force compared to factory hardware, ensuring the main caps remain seated and the crankshaft remains properly aligned under high-load conditions. Whether you are performing a standard rebuild or building a performance engine, these bolts offer the fatigue resistance and precision required for the Porsche 996 platform.

Every ARP fastener is heat-treated and thread-rolled after heat-treat to ensure maximum strength and accuracy. This kit replaces the original main bolts, offering a significant upgrade in reliability and structural integrity for the 1999-2001 Porsche 911 Carrera.

• Manufacturer Part Number: 204-5001
• Specifically engineered for 1999-2001 Porsche 911 Carrera (996) engines
• Precision-machined to ensure consistent torque loading
• Superior tensile strength over OEM torque-to-yield fasteners
• Essential for maintaining main cap alignment and bearing life

Secure the bottom end of your engine with the ARP Main Stud Kit for the Toyota Supra (B58B30). This kit is engineered to provide superior clamping force compared to factory hardware, which is essential for maintaining main cap alignment and protecting the crankshaft under high-torque and high-boost conditions.

Standard equipment for professional engine builders, these fasteners help eliminate main cap walk and ensure the structural integrity of the block during high-performance operation. This kit replaces the OE main cap bolts with high-strength studs for more accurate torque readings and improved reliability.

• Fits Toyota Supra (B58B30 engine)
• Provides increased clamping force over factory bolts
• Helps prevent main cap walk and maintain bearing alignment
• Essential for high-horsepower or forced induction builds
• Manufacturer Part Number: 203-5409

Fits select 2000-2011 Toyota Celica GTS, Corolla XRS, Matrix XRS, Lotus Elise/Exige, and Pontiac Vibe GT (1.8L).

The ARP Main Stud Kit (MPN 203-5407) provides the necessary clamping force to secure the crankshaft and prevent main cap walk in high-performance Toyota 2ZZ-GE engines. Factory main bolts can stretch under the increased cylinder pressures of boosted or high-RPM applications, leading to bearing failure. These studs offer superior strength and more accurate torque readings by providing a consistent load across the entire fastener, ensuring the main caps stay perfectly aligned under stress.

• Specifically engineered for the 1.8L 2ZZ-GE DOHC 4-cylinder engine
• Eliminates main cap movement to protect main bearings and crankshaft
• Constructed from premium materials with precise J-form threads for maximum strength
• Direct replacement for factory main cap hardware
• Manufacturer Part Number: 203-5407

Vehicle Fitment

Fits select 1981-1984 Toyota 4Runner, Celica, and Corona models equipped with the 22R engine.

The ARP 203-5406 Main Stud Kit is an essential upgrade for any high-performance engine build or standard rebuild. Unlike factory main bolts, these studs provide more accurate and consistent clamping force on the main bearing caps, which prevents cap walk and helps maintain precise crankshaft alignment. This is critical for engine longevity and reliability under increased loads.

Precision-engineered to meet the rigorous demands of automotive racing and street performance, this kit replaces the original hardware with high-strength fasteners. Each kit includes the necessary studs and nuts to secure the bottom end of your 22R block.

• Manufacturer Part Number: 203-5406
• Application: Toyota 22R engines
• Components: High-strength main studs and nuts
• Fitment: Fits 1981-1984 Toyota 4Runner, Celica, and Corona

Fits 1993-1998 Toyota Supra Twin Turbo models.

The ARP Main Stud Kit (MPN: 203-5405) is a critical upgrade for high-performance 2JZ-GTE builds, providing the superior clamping force required to prevent main cap walk and maintain precise crankshaft alignment. When increasing boost or horsepower, factory main bolts can stretch and lead to catastrophic bearing failure or block damage; these ARP studs provide a significant increase in tensile strength to secure the bottom end under extreme loads.

Every stud is manufactured from premium 8740 chrome moly steel and heat-treated to a 200,000 psi tensile strength. The threads are rolled after heat-treatment to ensure maximum fatigue life, meeting the tight tolerances required for high-RPM applications.

• Replaces factory main cap bolts with high-strength studs
• Manufactured from 8740 chrome moly steel
• Heat-treated to 200,000 psi tensile strength
• Precision J-form threads rolled after heat-treat for superior strength
• Kit includes all necessary studs, parallel-ground washers, and 12-point nuts
• Manufacturer Part Number: 203-5405

Fits 1988-1995 Toyota Celica All Trac and MR2 Turbo (3SGTE).

The ARP Main Stud Kit is a critical upgrade for any high-performance Toyota 3SGTE engine build. Designed to replace the factory main bolts, these studs provide significantly more consistent clamping force to the crankshaft main caps. This added rigidity helps prevent the main cap walk that can occur under high boost or high RPM, protecting your bearings and ensuring the structural integrity of the bottom end.

• Specifically engineered for the Toyota 3SGTE engine block.
• Ensures precise main cap alignment and superior clamping force compared to OE bolts.
• Manufactured from premium materials for high tensile strength and durability.
• Complete kit includes all necessary studs, parallel-ground washers, and nuts.
• Manufacturer Part Number: 203-5404

Fits select 1985-1991 Toyota Camry, Celica, and MR2 models equipped with the 4AG 16V engine.

Maintaining absolute alignment of the main caps is critical for high-performance builds, especially when increasing RPM or boost levels. The ARP 203-5403 Main Stud Kit replaces factory main bolts with high-strength studs to virtually eliminate main cap walk and protect the engine's bottom end. Each stud is manufactured from premium 8740 chrome moly steel and heat-treated to a 200,000 psi tensile strength rating. The threads are rolled after heat treatment, which provides significantly better fatigue strength compared to studs with threads cut into the material.

• Specifically designed for the Toyota 4AG 16V engine block
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Precision centerless ground for perfect concentricity
• Includes heavy-duty nuts and parallel-ground washers
• Manufacturer Part Number: 203-5403

Fits 1987-1992 Toyota Supra Turbo (7M-GTE).

Strengthen the bottom end of your 7M-GTE with the ARP 203-5402 Main Stud Kit. These high-tensile fasteners provide the clamping force necessary to prevent main cap walk and fretting, protecting your engine's bearings and maintaining precise crankshaft alignment under high-boost or high-RPM conditions.

Unlike factory bolts that stretch during torque-to-yield installation, ARP studs are threaded into the block finger-tight, allowing the nut to be torqued for a more accurate and consistent load across all main caps. This kit is a critical upgrade for any performance rebuild where reliability and block integrity are paramount.

• Manufacturer Part Number: 203-5402
• Eliminates main cap movement and "walk" during high-load operation
• Ensures consistent clamping force and accurate torque readings
• Includes all necessary high-strength studs, washers, and nuts
• Engineered specifically for the 1987-1992 Toyota 7M-GTE platform

Fits select 2001-2014 Toyota Camry, Highlander, Matrix, RAV4, and Scion tC/xB (2.4L).

The ARP 203-5401 Main Stud Kit provides the superior clamping force needed to maintain crankshaft alignment and prevent main cap walk in the Toyota 2.4L 2AZ-FE engine. Whether you are performing a standard rebuild or building a high-horsepower forced induction setup, these studs offer a significant upgrade over factory torque-to-yield bolts which are prone to stretching and fatigue.

Each stud is manufactured from premium 8740 chrome moly steel and heat-treated to a tensile strength of 200,000 psi. To ensure maximum durability and consistent torque loading, the threads are rolled after heat treatment, which improves their fatigue life by up to 10 times compared to studs with cut threads. This kit includes parallel-ground washers and high-strength nuts to complete the installation.

• Manufacturer Part Number: 203-5401
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Engine Compatibility: Toyota 2.4L (2AZ-FE) 4-Cylinder
• Kit Includes: Main studs, parallel-ground washers, and 12-point nuts

Vehicle Fitment:

• 2005-2010 Scion tC Base
• 2007-2008 Scion tC Spec
• 2008-2014 Scion xB Base
• 2005-2006, 2009 Toyota Camry Base
• 2007-2008 Toyota Camry CE
• 2002-2009 Toyota Camry LE, SE, XLE
• 2009-2010 Toyota Corolla XRS
• 2001-2007 Toyota Highlander Base
• 2009-2013 Toyota Matrix S
• 2009-2010 Toyota Matrix XRS
• 2004-2008 Toyota RAV4 Base
• 2005 Toyota RAV4 L
• 2006-2008 Toyota RAV4 Limited
• 2005-2008 Toyota RAV4 Sport

Fits select 1984-1993 Toyota Celica, Corolla, and MR2 models equipped with the 1600cc 4A-GE engine.

The ARP Main Bolt Kit (MPN 203-5001) is a critical upgrade for stabilizing the bottom end of your engine. These fasteners provide the superior clamping force necessary to secure the main caps, preventing main cap walk and maintaining precise crankshaft alignment during high-RPM operation or high-load conditions. This kit is designed specifically for performance-minded 4A-GE builds where factory hardware may reach its fatigue limit.

• Engineered specifically for Toyota 1600cc 4A-GE engine applications
• Replaces factory main cap hardware to ensure maximum bottom-end rigidity
• Critical for high-revving N/A or forced-induction power plants
• Manufactured to ARP's strict tolerances for consistent tensile strength
• Manufacturer Part Number: 203-5001

Fits 2009-2014 Nissan GT-R models (Base, Black Edition, Premium, and Track Edition) equipped with the VR38 engine.

Essential for high-performance VR38 builds, the ARP Main Stud Kit (MPN 202-5802) provides the superior clamping force required to secure the main caps and maintain precise crankshaft alignment. Unlike factory main bolts that can stretch under extreme cylinder pressure, these high-strength fasteners prevent main cap walk and ensure more consistent load distribution on the main bearings. Whether you are performing a standard rebuild or a high-horsepower build, these studs offer the reliability needed for heavy-duty street and track use.

• Manufactured from premium 8740 chrome moly steel
• Heat-treated to a 200,000 psi tensile strength rating
• Precision J-form threads rolled after heat treatment for maximum fatigue resistance
• Includes all necessary main studs, parallel-ground washers, and 12-point nuts
• Manufacturer Part Number: 202-5802

Vehicle Fitment

Fits 2003-2006 Nissan 350Z and Infiniti G35 (VQ35).

The ARP 202-5801 Main Stud Kit is a critical upgrade for high-performance Nissan VQ35 engine builds. These 4-bolt main studs provide superior clamping force compared to factory hardware, effectively preventing main cap walk and ensuring proper crankshaft alignment under extreme loads, such as forced induction or high-RPM racing applications.

• Provides high-tensile strength to secure main caps during operation
• Reduces wear on main bearings by maintaining precise tolerances
• Specifically designed for VQ35 4-bolt main configurations
• Manufacturer Part Number: 202-5801
• Includes all necessary studs, nuts, and washers for installation

Fits 1974-1983 Nissan 260Z, 280Z, and 280ZX models equipped with L24, L26, or L28 6-cylinder engines.

The ARP 202-5406 Main Stud Kit is an essential upgrade for any high-performance or rebuilt Nissan L-series engine. These fasteners provide significantly higher clamping force than factory main bolts, ensuring the crankshaft remains properly aligned under high RPM and heavy load conditions. By utilizing studs instead of bolts, you eliminate the risk of thread damage to the engine block while ensuring more accurate and consistent torque loading during assembly.

• Fits Engine Series: Nissan L24, L26, L28 (6-Cylinder)
• Application: Main Bearing Caps
• Provides superior clamping force compared to OE hardware
• Reduces main cap walk and protects engine block threads
• Manufacturer Part Number: 202-5406

Fits Nissan RB26 inline 6-cylinder engines.

The ARP 202-5403 Main Stud Kit is a critical upgrade for high-performance Nissan RB26 engine builds. Designed to provide significantly higher clamping force than factory main bolts, these studs effectively eliminate main cap "walk" and protect the crankshaft and bearings during high-RPM or high-boost operation. By switching from a bolt to a stud, you ensure more accurate torque loading and prevent threads from pulling out of the engine block.

Every fastener in this kit is manufactured from premium 8740 chromoly steel, heat-treated to a 200,000 psi tensile strength. The threads are rolled after heat treatment, providing 1000% better fatigue life compared to fasteners with threads rolled before heat treatment. Each kit is completed with hardened parallel-ground washers and high-strength nuts to ensure even load distribution.

• Engine Application: Nissan RB26 Inline 6-Cylinder
• Material: 8740 Chromoly Steel
• Tensile Strength: 200,000 psi
• Finish: Black Oxide
• Included Components: Main studs, 12-point nuts, parallel-ground washers, and assembly lubricant
• Manufacturer Part Number: 202-5403

Fits 1989-1998 Nissan 240SX (SR20DET).

The ARP 202-5402 Main Stud Kit is a critical upgrade for high-performance Nissan SR20DET builds. Designed to provide superior clamping force compared to factory main bolts, these studs ensure the crankshaft main caps remain securely seated under the extreme cylinder pressures of high-boost or high-RPM operation. By replacing the OE hardware, this kit eliminates main cap walk and protects the engine's bottom end from bearing failure and block fretting.

• Manufacturer Part Number: 202-5402
• Application: Nissan SR20DET engines
• Material: Premium high-strength alloy
• Prevents main cap walk and crankshaft misalignment
• Includes all necessary studs, 12-point nuts, and parallel-ground washers
• Ideal for both street and competitive racing applications

Fits select 1974-1980 Nissan 200SX, 510, 610, 620, 710, and 720 models equipped with the L20 engine.

The ARP 202-5401 Main Stud Kit is a critical upgrade for engine builders seeking to stabilize the bottom end of the Nissan L20 engine. Unlike factory main bolts that are prone to stretching, these studs provide superior clamping force and ensure the main caps remain securely seated under high RPM and heavy load conditions. By using studs instead of bolts, you achieve more accurate torque loading and prevent premature wear on the engine block's internal threads during assembly.

• Manufacturer Part Number: 202-5401
• Application: Nissan L20 Engines
• Prevents main cap walk and ensures proper crankshaft alignment
• Includes high-strength studs, parallel-ground washers, and 12-point nuts
• Designed for high-performance and competition use

Secure your engine's bottom end with the ARP Main Stud Kit (201-5402), specifically engineered for the BMW B58 3.0L platform. In high-performance applications, factory main bolts can stretch, leading to main cap walk and potential bearing failure. These ARP studs provide the superior clamping force and fatigue life necessary to maintain perfect crankshaft alignment under increased boost and high-RPM conditions.

• Fits BMW B58 (3.0L) engines
• Replaces factory main cap hardware for improved block rigidity
• Precision-ground studs for accurate torque loading and consistent clamping
• Complete kit includes all necessary studs, parallel-ground washers, and nuts
• Manufacturer Part Number: 201-5402

Fits BMW N12, N14, N16, and N18 1.6L engines.

The ARP 201-5401 Main Stud Kit is a critical upgrade for any 1.6L BMW engine build where reliability and high-RPM performance are the priority. Unlike factory torque-to-yield (TTY) bolts that must be discarded after every use, these high-strength studs provide a much more accurate and consistent clamping force. This prevents main cap walk and ensures the crankshaft stays properly aligned under heavy loads.

• Designed specifically for BMW N12, N14, N16, and N18 1.6L engine blocks
• Replaces factory main cap hardware for improved bottom-end stability
• Ensures consistent clamping force to maintain bearing alignment
• Complete kit includes all necessary studs, 12-point nuts, and parallel-ground washers
• Manufacturer Part Number: 201-5401

Fits 2001-2008 BMW M3, Z3 M, and Z4 M models equipped with the S54 inline-six engine.

The ARP 201-5002 Main Stud Kit is an essential upgrade for high-performance BMW S54 engine builds. These studs provide significantly more clamping force than factory bolts, preventing main cap walk and ensuring crankshaft alignment under high RPM or forced induction loads. Unlike OE bolts that are designed for a single use, these reusable studs offer superior fatigue strength and consistent torque loading.

• Manufactured from premium 8740 chrome moly steel
• Heat-treated to a 200,000 psi tensile strength rating
• Threads are rolled after heat treatment for maximum fatigue resistance
• Includes parallel-ground hardened washers and 12-point nuts
• Designed for precise main cap alignment and engine block longevity
• Manufacturer Part Number: 201-5002

Fits 1977-1991 BMW 320i and M3 models equipped with the M10 or S14 engine.

The ARP 201-5001 Main Stud Kit is an essential upgrade for any high-performance BMW M10 or S14 build. Unlike factory main bolts that stretch during installation and under high load, these studs provide superior clamping force to keep the crankshaft properly seated and prevent main cap walk. This kit is manufactured from 8740 chrome moly steel, heat-treated to 200,000 psi tensile strength, and precision-ground with threads rolled after heat treatment for maximum fatigue strength.

• Engineered for BMW M10 and S14 bottom ends
• Manufactured from 8740 chrome moly steel
• Rated at 200,000 psi tensile strength
• Precision-ground and heat-treated for durability
• Includes all necessary studs, parallel-ground washers, and 12-point nuts
• Manufacturer Part Number: 201-5001

Vehicle Fitment:

Fits select 1991-2000 BMW 323, 325, 328, 525, 528, M3, and Z3 models (M50, M52, S50US, and S52US engines).

The ARP 201-5000 2-Bolt Main Stud Kit is a critical upgrade for any high-performance BMW inline-six build. These studs provide significantly more clamping force than factory main bolts, which is essential for maintaining alignment of the main bearing caps and preventing "cap walk" under high RPM or forced induction loads. By using studs instead of bolts, you ensure more accurate and consistent torque loading on the main journals.

• Manufacturer Part Number: 201-5000
• Configuration: 2-Bolt Main
• Engine Compatibility: M50, M52, S50US, S52US
• Material: High-strength fasteners engineered for maximum fatigue life
• Includes all necessary studs, washers, and nuts for a complete installation

Fits Saturn 1.9L engines with 2-bolt mains and 1/2 inch straps (1.9L).

Engineered to exceed the requirements of high-performance builds, the ARP 165-5401 Main Stud Kit provides the clamping force necessary to prevent main cap walk and stabilize the rotating assembly. Manufactured from premium 8740 chrome moly steel, these fasteners are heat-treated to a 200,000 psi tensile strength, offering a significant upgrade over factory bolts that are prone to stretching under high-load conditions.

Every ARP stud is centerless ground to ensure perfect concentricity and features threads rolled after heat treatment for superior fatigue strength. This kit allows for more accurate and consistent torque loading during assembly, protecting your engine block's threads from excessive wear while ensuring a reliable seal.

• Fits Saturn 1.9L with 2-bolt main and 1/2 inch straps
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Finish: Black Oxide
• Fastener Style: Stud
• Manufacturer Part Number: 165-5401
• Includes all necessary studs, parallel-ground washers, and 12-point nuts

Fits Ford Modular 4.6L and 5.4L 3-valve engines with 4-bolt main caps and a windage tray.

Protect your engine's bottom end from the stresses of high-RPM use or forced induction with the ARP 156-5901 Main Stud Kit. Designed to replace factory main bolts, these studs provide significantly more accurate torque loading and eliminate main cap walk. Unlike bolts, studs allow for consistent clamping force by ensuring the fastener is not twisted during the torquing process.

Each stud is manufactured from premium 8740 chrome moly steel and heat-treated to a 200,000 psi tensile strength. The threads are rolled after heat-treatment, resulting in a fastener with 10 times better fatigue life than those with threads cut before heat-treating. This specific kit is engineered to accommodate the factory windage tray, ensuring proper clearance and secure mounting for your 3V Modular build.

• Manufacturer Part Number: 156-5901
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Finish: Black Oxide
• Engine Fitment: Ford Modular 4.6L/5.4L 3-Valve
• Main Cap Style: 4-Bolt
• Provisions: Includes hardware for Windage Tray mounting
• Includes: High-strength main studs, parallel-ground washers, and 12-point nuts

Fits select 2011-2014 Ford Mustang GT and Boss 302 models (5.0L).

Ensure the structural integrity of your Ford Coyote engine's bottom end with the ARP 156-5803 Main Stud Kit. These high-strength fasteners provide the precise clamping force required to secure the main caps, preventing the cap walk and fretting common in high-RPM or forced induction 5.0L builds. Engineered to exceed OEM hardware capabilities, this kit is an essential upgrade for any performance rebuild where block stability and crankshaft alignment are critical.

• Manufactured from premium 8740 chrome moly steel
• Heat-treated to a 200,000 psi tensile strength rating
• Precision J-form threads rolled after heat-treat for superior fatigue resistance
• Black oxide finish for corrosion resistance and long-term durability
• Complete kit includes heavy-duty washers and high-strength nuts
• Manufacturer Part Number: 156-5803

Strengthen the bottom end of your Ford Modular engine with the ARP 4-bolt main stud kit. Designed specifically for the 4.6L 4V platform, this kit replaces the factory main bolts with high-strength studs to provide superior clamping force and prevent main cap walk during high-RPM or high-boost operation.

• Manufactured from premium 8740 chrome moly steel
• Heat-treated to 200,000 psi tensile strength for maximum reliability
• Threads are rolled after heat treatment for 1,000% higher fatigue strength than studs threaded before heat treat
• Includes precision-machined 12-point nuts and hardened parallel-ground washers
• Engineered for 4.6L 4V engines with 4-bolt main configurations
• Manufacturer Part Number: 156-5802