PAC Racing Springs 5/16 Valve Locks 10-Degree Steel -.050 Height — Performance Valvetrain Components

SKU: DHDL_PAC-L8064-16
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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 PAC Racing Springs

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

Watch in action

Precision 10-Degree Valve Locks for 5/16 Stems

When tuning your valvetrain for maximum performance, every thousandth of an inch counts. These PAC Racing Springs 5/16 valve locks feature a 10-degree taper and a -.050 inch height reduction, making them the ideal choice for builders looking to decrease installed height and increase spring pressure. Manufactured from high-quality steel, these locks provide the strength necessary to handle aggressive camshaft profiles and high-RPM operation.

Engineered for Performance

  • Height Reduction: -.050 inch design helps increase effective spring pressure.
  • 10-Degree Taper: Provides superior grip for high-performance retainers.
  • 5/16 Stem Compatibility: Designed for precision fitment on performance valves.
  • Durable Construction: Black oxide finish for long-lasting wear resistance.

The 10-degree lock design is preferred in many high-end racing applications for its ability to distribute load more effectively than standard 7-degree locks. These locks ensure that your valves stay firmly in place, even under the most demanding conditions. Whether you are building a drag racing engine or a high-output street machine, these PAC Racing components provide the reliability and precision you demand. By choosing the right lock height, you can fine-tune your valvetrain to ensure optimal performance and longevity. Upgrade your engine today with high-quality components from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About PAC Racing Springs

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

Watch in action

Precision 10-Degree Valve Locks for 5/16 Stems

When tuning your valvetrain for maximum performance, every thousandth of an inch counts. These PAC Racing Springs 5/16 valve locks feature a 10-degree taper and a -.050 inch height reduction, making them the ideal choice for builders looking to decrease installed height and increase spring pressure. Manufactured from high-quality steel, these locks provide the strength necessary to handle aggressive camshaft profiles and high-RPM operation.

Engineered for Performance

  • Height Reduction: -.050 inch design helps increase effective spring pressure.
  • 10-Degree Taper: Provides superior grip for high-performance retainers.
  • 5/16 Stem Compatibility: Designed for precision fitment on performance valves.
  • Durable Construction: Black oxide finish for long-lasting wear resistance.

The 10-degree lock design is preferred in many high-end racing applications for its ability to distribute load more effectively than standard 7-degree locks. These locks ensure that your valves stay firmly in place, even under the most demanding conditions. Whether you are building a drag racing engine or a high-output street machine, these PAC Racing components provide the reliability and precision you demand. By choosing the right lock height, you can fine-tune your valvetrain to ensure optimal performance and longevity. Upgrade your engine today with high-quality components from GGCRACING.

Product Details

Product Description

About PAC Racing Springs

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

Watch in action

Precision 10-Degree Valve Locks for 5/16 Stems

When tuning your valvetrain for maximum performance, every thousandth of an inch counts. These PAC Racing Springs 5/16 valve locks feature a 10-degree taper and a -.050 inch height reduction, making them the ideal choice for builders looking to decrease installed height and increase spring pressure. Manufactured from high-quality steel, these locks provide the strength necessary to handle aggressive camshaft profiles and high-RPM operation.

Engineered for Performance

  • Height Reduction: -.050 inch design helps increase effective spring pressure.
  • 10-Degree Taper: Provides superior grip for high-performance retainers.
  • 5/16 Stem Compatibility: Designed for precision fitment on performance valves.
  • Durable Construction: Black oxide finish for long-lasting wear resistance.

The 10-degree lock design is preferred in many high-end racing applications for its ability to distribute load more effectively than standard 7-degree locks. These locks ensure that your valves stay firmly in place, even under the most demanding conditions. Whether you are building a drag racing engine or a high-output street machine, these PAC Racing components provide the reliability and precision you demand. By choosing the right lock height, you can fine-tune your valvetrain to ensure optimal performance and longevity. Upgrade your engine today with high-quality components from GGCRACING.

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