ARP 156-5203 Chromoly 12-Point Main Cap Side Bolt Kit — Ford Coyote Boss 5.0L Late Cast Iron Block 2-Bolt Mains

SKU: BQDN_156-5203
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Secure Your Ford Coyote Boss 5.0L with ARP Main Cap Side Bolts

For the formidable Ford Coyote Boss 5.0L engine, especially those built with a Late Cast Iron Block and 2-Bolt Mains, maintaining crankshaft stability under extreme power is non-negotiable. The ARP 156-5203 Chromoly 12-Point Main Cap Side Bolt Kit is meticulously engineered to provide essential lateral support to your main caps, effectively combating main cap walk and ensuring precise crankshaft alignment in the most demanding high-performance scenarios. This kit is a vital upgrade for any serious Coyote build.

Engineered for the Demands of the Coyote Platform

Each side bolt in this ARP kit is precision-machined from premium 8740 chromoly steel, a material celebrated for its extraordinary tensile strength and fatigue resistance, making it perfectly suited for the high-revving and high-output nature of the Coyote engine. Featuring a precise 9mm thread and a practical 12-point head, these bolts offer superior clamping force and facilitate easier, more accurate torque application, even in the tight confines of the engine block. The durable black oxide finish provides excellent corrosion resistance, ensuring long-term reliability and a professional aesthetic. By reinforcing the main caps from the side, these bolts work synergistically with your main studs or bolts to create an exceptionally rigid and robust bottom end assembly.

Key Features for Uncompromising Coyote Performance:

  • Material: Crafted from high-strength 8740 Chromoly Steel for ultimate durability and resilience in high-stress Coyote applications.
  • Head Design: Features a 12-point head for improved wrenching access and precise, consistent torque application.
  • Thread Specification: M9 (9mm) thread, specifically designed for optimal fitment in Ford Coyote engines.
  • Application: Exclusively engineered for Ford Coyote Boss 5.0L Late Cast Iron Blocks with 2-bolt mains.
  • Performance Benefits: Crucially prevents main cap walk, significantly enhances crankshaft stability, and strengthens the overall engine bottom end, vital for boosted or high-RPM Coyote builds.

The GGCRACING Advantage: Power Your Coyote with ARP Precision

ARP (Auto Racing Products) is the undisputed global leader in high-performance engine fasteners, trusted by top racing teams and discerning engine builders for their unwavering commitment to quality and precision. The 156-5203 kit is an indispensable component for any Ford Coyote Boss 5.0L Late Cast Iron Block destined for extreme horsepower, forced induction, or competitive racing. By providing critical lateral support to your main caps, these side bolts ensure your crankshaft remains perfectly aligned, minimizing wear and extending the lifespan of your high-performance Coyote engine. Choose the proven strength and engineering excellence of ARP fasteners for your next build, proudly supplied by GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Secure Your Ford Coyote Boss 5.0L with ARP Main Cap Side Bolts

For the formidable Ford Coyote Boss 5.0L engine, especially those built with a Late Cast Iron Block and 2-Bolt Mains, maintaining crankshaft stability under extreme power is non-negotiable. The ARP 156-5203 Chromoly 12-Point Main Cap Side Bolt Kit is meticulously engineered to provide essential lateral support to your main caps, effectively combating main cap walk and ensuring precise crankshaft alignment in the most demanding high-performance scenarios. This kit is a vital upgrade for any serious Coyote build.

Engineered for the Demands of the Coyote Platform

Each side bolt in this ARP kit is precision-machined from premium 8740 chromoly steel, a material celebrated for its extraordinary tensile strength and fatigue resistance, making it perfectly suited for the high-revving and high-output nature of the Coyote engine. Featuring a precise 9mm thread and a practical 12-point head, these bolts offer superior clamping force and facilitate easier, more accurate torque application, even in the tight confines of the engine block. The durable black oxide finish provides excellent corrosion resistance, ensuring long-term reliability and a professional aesthetic. By reinforcing the main caps from the side, these bolts work synergistically with your main studs or bolts to create an exceptionally rigid and robust bottom end assembly.

Key Features for Uncompromising Coyote Performance:

  • Material: Crafted from high-strength 8740 Chromoly Steel for ultimate durability and resilience in high-stress Coyote applications.
  • Head Design: Features a 12-point head for improved wrenching access and precise, consistent torque application.
  • Thread Specification: M9 (9mm) thread, specifically designed for optimal fitment in Ford Coyote engines.
  • Application: Exclusively engineered for Ford Coyote Boss 5.0L Late Cast Iron Blocks with 2-bolt mains.
  • Performance Benefits: Crucially prevents main cap walk, significantly enhances crankshaft stability, and strengthens the overall engine bottom end, vital for boosted or high-RPM Coyote builds.

The GGCRACING Advantage: Power Your Coyote with ARP Precision

ARP (Auto Racing Products) is the undisputed global leader in high-performance engine fasteners, trusted by top racing teams and discerning engine builders for their unwavering commitment to quality and precision. The 156-5203 kit is an indispensable component for any Ford Coyote Boss 5.0L Late Cast Iron Block destined for extreme horsepower, forced induction, or competitive racing. By providing critical lateral support to your main caps, these side bolts ensure your crankshaft remains perfectly aligned, minimizing wear and extending the lifespan of your high-performance Coyote engine. Choose the proven strength and engineering excellence of ARP fasteners for your next build, proudly supplied by GGCRACING.

Product Details

Product Description

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Secure Your Ford Coyote Boss 5.0L with ARP Main Cap Side Bolts

For the formidable Ford Coyote Boss 5.0L engine, especially those built with a Late Cast Iron Block and 2-Bolt Mains, maintaining crankshaft stability under extreme power is non-negotiable. The ARP 156-5203 Chromoly 12-Point Main Cap Side Bolt Kit is meticulously engineered to provide essential lateral support to your main caps, effectively combating main cap walk and ensuring precise crankshaft alignment in the most demanding high-performance scenarios. This kit is a vital upgrade for any serious Coyote build.

Engineered for the Demands of the Coyote Platform

Each side bolt in this ARP kit is precision-machined from premium 8740 chromoly steel, a material celebrated for its extraordinary tensile strength and fatigue resistance, making it perfectly suited for the high-revving and high-output nature of the Coyote engine. Featuring a precise 9mm thread and a practical 12-point head, these bolts offer superior clamping force and facilitate easier, more accurate torque application, even in the tight confines of the engine block. The durable black oxide finish provides excellent corrosion resistance, ensuring long-term reliability and a professional aesthetic. By reinforcing the main caps from the side, these bolts work synergistically with your main studs or bolts to create an exceptionally rigid and robust bottom end assembly.

Key Features for Uncompromising Coyote Performance:

  • Material: Crafted from high-strength 8740 Chromoly Steel for ultimate durability and resilience in high-stress Coyote applications.
  • Head Design: Features a 12-point head for improved wrenching access and precise, consistent torque application.
  • Thread Specification: M9 (9mm) thread, specifically designed for optimal fitment in Ford Coyote engines.
  • Application: Exclusively engineered for Ford Coyote Boss 5.0L Late Cast Iron Blocks with 2-bolt mains.
  • Performance Benefits: Crucially prevents main cap walk, significantly enhances crankshaft stability, and strengthens the overall engine bottom end, vital for boosted or high-RPM Coyote builds.

The GGCRACING Advantage: Power Your Coyote with ARP Precision

ARP (Auto Racing Products) is the undisputed global leader in high-performance engine fasteners, trusted by top racing teams and discerning engine builders for their unwavering commitment to quality and precision. The 156-5203 kit is an indispensable component for any Ford Coyote Boss 5.0L Late Cast Iron Block destined for extreme horsepower, forced induction, or competitive racing. By providing critical lateral support to your main caps, these side bolts ensure your crankshaft remains perfectly aligned, minimizing wear and extending the lifespan of your high-performance Coyote engine. Choose the proven strength and engineering excellence of ARP fasteners for your next build, proudly supplied by GGCRACING.

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