PRW Billet Main Caps 2 to 4-Bolt Conversion — Fits 67-86 Chevy 350

SKU: FMJX_1735003
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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 PRW

PRW engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full PRW lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Upgrade to 4-Bolt Main Strength for Chevy 350

Transform your 2-bolt main Small Block Chevy 350 into a 4-bolt powerhouse with these PRW Billet Main Caps. Designed for 1967-1986 engine blocks, this conversion kit allows you to add the extra clamping force needed for high-performance and racing applications. By upgrading to these billet steel caps, you gain the structural rigidity required to support increased horsepower and torque without the risk of main cap walk.

Product Highlights

  • Application: Small Block Chevy 350
  • Conversion: 2-Bolt to 4-Bolt
  • Material: Billet Steel
  • Bolt Pattern: Straight Bolts
  • Quantity: Set of 3 (Center Caps)

These caps are precision-engineered to provide a tight, secure fit, ensuring that your crankshaft remains stable even at high RPMs. The use of billet steel offers far superior fatigue resistance compared to cast iron factory caps, making them an essential upgrade for any performance engine build. This set is specifically designed for the center main positions, providing the most critical support where the engine experiences the highest load. Whether you are building a drag car or a high-output street engine, these main caps provide the peace of mind you need. Trust your engine's foundation to the quality parts available at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About PRW

PRW engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full PRW lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Upgrade to 4-Bolt Main Strength for Chevy 350

Transform your 2-bolt main Small Block Chevy 350 into a 4-bolt powerhouse with these PRW Billet Main Caps. Designed for 1967-1986 engine blocks, this conversion kit allows you to add the extra clamping force needed for high-performance and racing applications. By upgrading to these billet steel caps, you gain the structural rigidity required to support increased horsepower and torque without the risk of main cap walk.

Product Highlights

  • Application: Small Block Chevy 350
  • Conversion: 2-Bolt to 4-Bolt
  • Material: Billet Steel
  • Bolt Pattern: Straight Bolts
  • Quantity: Set of 3 (Center Caps)

These caps are precision-engineered to provide a tight, secure fit, ensuring that your crankshaft remains stable even at high RPMs. The use of billet steel offers far superior fatigue resistance compared to cast iron factory caps, making them an essential upgrade for any performance engine build. This set is specifically designed for the center main positions, providing the most critical support where the engine experiences the highest load. Whether you are building a drag car or a high-output street engine, these main caps provide the peace of mind you need. Trust your engine's foundation to the quality parts available at GGCRACING.

Product Details

Product Description

About PRW

PRW engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full PRW lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Upgrade to 4-Bolt Main Strength for Chevy 350

Transform your 2-bolt main Small Block Chevy 350 into a 4-bolt powerhouse with these PRW Billet Main Caps. Designed for 1967-1986 engine blocks, this conversion kit allows you to add the extra clamping force needed for high-performance and racing applications. By upgrading to these billet steel caps, you gain the structural rigidity required to support increased horsepower and torque without the risk of main cap walk.

Product Highlights

  • Application: Small Block Chevy 350
  • Conversion: 2-Bolt to 4-Bolt
  • Material: Billet Steel
  • Bolt Pattern: Straight Bolts
  • Quantity: Set of 3 (Center Caps)

These caps are precision-engineered to provide a tight, secure fit, ensuring that your crankshaft remains stable even at high RPMs. The use of billet steel offers far superior fatigue resistance compared to cast iron factory caps, making them an essential upgrade for any performance engine build. This set is specifically designed for the center main positions, providing the most critical support where the engine experiences the highest load. Whether you are building a drag car or a high-output street engine, these main caps provide the peace of mind you need. Trust your engine's foundation to the quality parts available at GGCRACING.

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