We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in

Fel-Pro

Fel-Pro BS40645 Rear Main Gasket

SKU CH-789P-BQDTB

A Fel-Pro rear main gasket seals the crankshaft rear to stop oil leaks

  • ColorTransparent
  • Reliable sealing from Fel-Pro brand quality
  • Transparent material allows visual inspection during installation
  • Exact-fit rear-main gasket for precise engine repair
  • Listed by manufacturer in early 2024
  • Direct-from-manufacturer shipping ensures authentic part

Product Identity

The Fel-Pro BS40645 is a rear main gasket designed to seal the crankshaft at the back of an engine block. It is intended for mechanics and DIY enthusiasts performing engine rebuilds or addressing oil leaks in compatible applications. The transparent colour helps confirm correct seating during installation. This new component arrives directly from the manufacturer.

Suitability & Limits

This gasket suits technicians replacing a worn rear main seal on a matching engine. It is not for buyers who need a full gasket set, front seals, or components for a different engine family. Shops looking for bulk kits or additional hardware should look elsewhere.

Deciding Specification

The decisive detail is the Fel-Pro BS40645 part number, which identifies the exact engine application this gasket fits. Verify this number against your service manual before ordering.

Highlights

  • Reliable sealing from Fel-Pro brand quality
  • Transparent material allows visual inspection during installation
  • Exact-fit rear-main gasket for precise engine repair
  • Listed by manufacturer in early 2024
  • Direct-from-manufacturer shipping ensures authentic part

Specifications

BrandFEL-PRO
ColorTransparent

Questions about this item

Which Fel-Pro rear main gasket version should I choose for my engine?

The BS40645 is the single model offered; match it to your engine application using the manufacturer catalogue.

What does the transparent colour mean once the gasket is installed?

The transparent material lets you visually confirm correct seating and seal alignment during installation.

What installation standard does this gasket follow and what does it seal?

It is designed to original-equipment specifications to seal the crankshaft rear main bearing journal against oil leaks.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.