Allstar Performance Rear Main Seal Adapter — Fits 1955-86 Small Block Chevy

SKU: DNLF_ALL26125
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About Allstar Performance Allstar Performance is America's leading circle-track racing ...Read More

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Sale price$199.99
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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 Allstar Performance

Allstar Performance is America's leading circle-track racing parts manufacturer. From aluminum panels and chassis components to brake hardware, steering boxes, and oval-track shock packages — every Allstar product is born from sprint car and modified racing experience.

Watch in action

Upgrade Your SBC Rear Main Seal

Modernize your classic Small Block Chevy engine with the Allstar Performance Rear Main Seal Adapter. This kit is specifically engineered to allow the installation of a modern 1-piece rear main seal into a traditional 1955-86 2-piece rear main seal block. By bridging the gap between vintage engine blocks and modern sealing technology, this adapter significantly reduces the risk of oil leaks, keeping your engine bay clean and your oil pressure consistent.

Technical Specifications

  • Application: 1955-86 Small Block Chevy
  • Conversion: 1-Piece Block to 2-Piece Crank
  • Material: Premium Aluminum
  • Kit Includes: Adapter and necessary hardware
  • Function: Prevents rear main oil leaks

This adapter is a must-have for engine builders performing a rebuild or a performance upgrade on a classic Chevy small block. The high-quality aluminum construction ensures a perfect fit and long-lasting durability under high-stress conditions. By eliminating the common leak points associated with older 2-piece seal designs, you can focus on performance rather than maintenance. Installation requires proper preparation of the block, but the results provide peace of mind for high-performance street and track applications. Ensure your engine is sealed correctly with this precision-engineered kit. Find the best engine internal components and sealing solutions at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Allstar Performance

Allstar Performance is America's leading circle-track racing parts manufacturer. From aluminum panels and chassis components to brake hardware, steering boxes, and oval-track shock packages — every Allstar product is born from sprint car and modified racing experience.

Watch in action

Upgrade Your SBC Rear Main Seal

Modernize your classic Small Block Chevy engine with the Allstar Performance Rear Main Seal Adapter. This kit is specifically engineered to allow the installation of a modern 1-piece rear main seal into a traditional 1955-86 2-piece rear main seal block. By bridging the gap between vintage engine blocks and modern sealing technology, this adapter significantly reduces the risk of oil leaks, keeping your engine bay clean and your oil pressure consistent.

Technical Specifications

  • Application: 1955-86 Small Block Chevy
  • Conversion: 1-Piece Block to 2-Piece Crank
  • Material: Premium Aluminum
  • Kit Includes: Adapter and necessary hardware
  • Function: Prevents rear main oil leaks

This adapter is a must-have for engine builders performing a rebuild or a performance upgrade on a classic Chevy small block. The high-quality aluminum construction ensures a perfect fit and long-lasting durability under high-stress conditions. By eliminating the common leak points associated with older 2-piece seal designs, you can focus on performance rather than maintenance. Installation requires proper preparation of the block, but the results provide peace of mind for high-performance street and track applications. Ensure your engine is sealed correctly with this precision-engineered kit. Find the best engine internal components and sealing solutions at GGCRACING.

Product Details

Product Description

About Allstar Performance

Allstar Performance is America's leading circle-track racing parts manufacturer. From aluminum panels and chassis components to brake hardware, steering boxes, and oval-track shock packages — every Allstar product is born from sprint car and modified racing experience.

Watch in action

Upgrade Your SBC Rear Main Seal

Modernize your classic Small Block Chevy engine with the Allstar Performance Rear Main Seal Adapter. This kit is specifically engineered to allow the installation of a modern 1-piece rear main seal into a traditional 1955-86 2-piece rear main seal block. By bridging the gap between vintage engine blocks and modern sealing technology, this adapter significantly reduces the risk of oil leaks, keeping your engine bay clean and your oil pressure consistent.

Technical Specifications

  • Application: 1955-86 Small Block Chevy
  • Conversion: 1-Piece Block to 2-Piece Crank
  • Material: Premium Aluminum
  • Kit Includes: Adapter and necessary hardware
  • Function: Prevents rear main oil leaks

This adapter is a must-have for engine builders performing a rebuild or a performance upgrade on a classic Chevy small block. The high-quality aluminum construction ensures a perfect fit and long-lasting durability under high-stress conditions. By eliminating the common leak points associated with older 2-piece seal designs, you can focus on performance rather than maintenance. Installation requires proper preparation of the block, but the results provide peace of mind for high-performance street and track applications. Ensure your engine is sealed correctly with this precision-engineered kit. Find the best engine internal components and sealing solutions at GGCRACING.

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