Allstar Performance Rear Main Seal Adapter — Fits 1986-Up Small Block Chevy

SKU: DNLF_ALL26126
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About Allstar Performance Allstar Performance is America's leading circle-track racing ...Read More

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Sale price$132.99
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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

Allstar Performance Rear Main Seal Adapter for SBC

Building a custom engine often involves mixing and matching parts from different eras. The Allstar Performance Rear Main Seal Adapter is the perfect solution for builders looking to install a 2-piece rear main seal crankshaft into a 1986-and-up 1-piece rear main seal Small Block Chevy engine block. This precision-machined adapter ensures a leak-free seal and proper alignment, allowing you to utilize older, proven crankshaft designs in newer engine blocks.

Product Specifications and Benefits

  • Allows use of 2-piece rear main seal crank in 1-piece block
  • Precision-engineered for a secure, leak-proof fit
  • Durable construction for long-term engine reliability
  • Ideal for custom engine builds and performance street applications
  • Simplifies the transition between different SBC engine generations

Engine building requires precision, and using the right adapters is key to a successful project. Allstar Performance is known for high-quality, reliable components that make complex engine swaps easier. This adapter kit is designed to meet the rigorous demands of automotive enthusiasts and professional engine builders alike. By bridging the gap between different Small Block Chevy generations, this part provides the flexibility you need for your performance build. Ensure your engine is built to last with high-quality components from 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

Allstar Performance Rear Main Seal Adapter for SBC

Building a custom engine often involves mixing and matching parts from different eras. The Allstar Performance Rear Main Seal Adapter is the perfect solution for builders looking to install a 2-piece rear main seal crankshaft into a 1986-and-up 1-piece rear main seal Small Block Chevy engine block. This precision-machined adapter ensures a leak-free seal and proper alignment, allowing you to utilize older, proven crankshaft designs in newer engine blocks.

Product Specifications and Benefits

  • Allows use of 2-piece rear main seal crank in 1-piece block
  • Precision-engineered for a secure, leak-proof fit
  • Durable construction for long-term engine reliability
  • Ideal for custom engine builds and performance street applications
  • Simplifies the transition between different SBC engine generations

Engine building requires precision, and using the right adapters is key to a successful project. Allstar Performance is known for high-quality, reliable components that make complex engine swaps easier. This adapter kit is designed to meet the rigorous demands of automotive enthusiasts and professional engine builders alike. By bridging the gap between different Small Block Chevy generations, this part provides the flexibility you need for your performance build. Ensure your engine is built to last with high-quality components from 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

Allstar Performance Rear Main Seal Adapter for SBC

Building a custom engine often involves mixing and matching parts from different eras. The Allstar Performance Rear Main Seal Adapter is the perfect solution for builders looking to install a 2-piece rear main seal crankshaft into a 1986-and-up 1-piece rear main seal Small Block Chevy engine block. This precision-machined adapter ensures a leak-free seal and proper alignment, allowing you to utilize older, proven crankshaft designs in newer engine blocks.

Product Specifications and Benefits

  • Allows use of 2-piece rear main seal crank in 1-piece block
  • Precision-engineered for a secure, leak-proof fit
  • Durable construction for long-term engine reliability
  • Ideal for custom engine builds and performance street applications
  • Simplifies the transition between different SBC engine generations

Engine building requires precision, and using the right adapters is key to a successful project. Allstar Performance is known for high-quality, reliable components that make complex engine swaps easier. This adapter kit is designed to meet the rigorous demands of automotive enthusiasts and professional engine builders alike. By bridging the gap between different Small Block Chevy generations, this part provides the flexibility you need for your performance build. Ensure your engine is built to last with high-quality components from GGCRACING.

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