---
product_id: 204772630
title: "Fel-Pro BS 40640 Rear Main Seal Set"
brand: "fel-pro"
price: "C$5112"
currency: NIO
in_stock: true
reviews_count: 5
category: "Fel Pro"
url: https://www.desertcart.ni/products/204772630-fel-pro-bs-40640-rear-main-seal-set
store_origin: NI
region: Nicaragua
---

# Proven 50+ years of trusted performance OEM-grade durability & leak resistance Precision fit for flawless installation Fel-Pro BS 40640 Rear Main Seal Set

**Brand:** fel-pro
**Price:** C$5112
**Availability:** ✅ In Stock

## Summary

> 🔩 Seal the deal with Fel-Pro – where precision meets performance!

## Quick Answers

- **What is this?** Fel-Pro BS 40640 Rear Main Seal Set by fel-pro
- **How much does it cost?** C$5112 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/204772630-fel-pro-bs-40640-rear-main-seal-set)

## Best For

- fel-pro enthusiasts

## Why This Product

- Trusted fel-pro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted with premium materials that outperform cheap aftermarket seals under heat stress.
- • **Trusted Legacy:** Over five decades of industry-leading reliability trusted by professionals worldwide.
- • **Tailored Perfection:** Application-specific design guarantees a seamless, leak-proof fit every time.
- • **Effortless Installation:** Compatible with alignment tools for precise, hassle-free setup and long-term seal integrity.
- • **Pro-Grade Seal Confidence:** Meets or exceeds all OEM specs, ensuring your engine stays protected mile after mile.

## Overview

The Fel-Pro BS 40640 Rear Main Seal Set delivers a perfect OEM-spec fit with durable, heat-resistant materials designed for long-lasting leak protection. Backed by over 50 years of trusted performance and validated for fit, form, and function, this professional-grade seal set ensures your engine’s rear main bearing stays flawlessly sealed, reducing costly repairs and downtime.

## Description

Fel-Pro gaskets offers 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Review: Has been a quality product for many many years (50 years in my case), so you can not go wrong with Fel-Pro.
Review: I chose this over a lot of other cheap, generic aftermarket rear main seals and gaskets. It's also mainly the rear main seal that's the most important, aside from the rear main cover gasket. I've seen a lot of the really cheap aftermarket rear main seals leak, so I wasn't going to take a chance; especially not after dropping my whole transmission and really not wanting to have to do that again in the next 10-20k miles (or maybe even less!). I did have a separate OEM GM LS rear main seal that I used, but this Fel-pro one is just as good, in my personal opinion. The cheap ones are sometimes a bit smaller in size, and the rubber material isn't as durable, which causes leaks as it gets heat-cycled. I also bought a billet aluminum rear main cover alignment tool, to center the rear main cover for installation (along with the new cover gasket), before using it to install the new rear main seal cover. I guess it's more exact to install using the alignment tool, but I've done it in the past with the rear main seal installed BEFORE re-installing the rear main cover, and I was still fine. Lastly, you'll also want to make sure to clean all the surfaces to the mating surfaces, including the oil pan gasket portion that the rear main cover sits on. I personally used Permatex ultra black RTV gasket maker, which is oil safe. The ultra gray version works as well, but I'm sure any high temp and oil-resistant RTV gasket maker, should do the trick just fine.

## Features

- Rear main bearing oil seal installation set
- Application-specific design ensures a perfect fit
- Meets or exceeds all original equipment specifications
- Validated for fit, form and function
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000C2GA1Y |
| Brand | Fel-Pro |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,983) |
| Date First Available | 7 Aug. 2012 |
| Item Weight | 22.7 g |
| Item model number | BS40640 |
| Manufacturer | Federal Mogul |
| Manufacturer part number | BS40640 |
| OEM Part Number | BS40640 |
| Product Dimensions | 30.48 x 27.94 x 2.79 cm; 22.68 g |

## Product Details

- **Brand:** Fel-Pro
- **Colour:** Mettalic Silver
- **Material:** Aluminium, Rubber
- **Shape:** Round
- **UPC:** 614046626461

## Images

![Fel-Pro BS 40640 Rear Main Seal Set - Image 1](https://m.media-amazon.com/images/I/41KJ47aYITL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on 24 January 2026*

Has been a quality product for many many years (50 years in my case), so you can not go wrong with Fel-Pro.

### ⭐⭐⭐⭐⭐ Review
*by B***. on 15 September 2025*

I chose this over a lot of other cheap, generic aftermarket rear main seals and gaskets. It's also mainly the rear main seal that's the most important, aside from the rear main cover gasket. I've seen a lot of the really cheap aftermarket rear main seals leak, so I wasn't going to take a chance; especially not after dropping my whole transmission and really not wanting to have to do that again in the next 10-20k miles (or maybe even less!). I did have a separate OEM GM LS rear main seal that I used, but this Fel-pro one is just as good, in my personal opinion. The cheap ones are sometimes a bit smaller in size, and the rubber material isn't as durable, which causes leaks as it gets heat-cycled. I also bought a billet aluminum rear main cover alignment tool, to center the rear main cover for installation (along with the new cover gasket), before using it to install the new rear main seal cover. I guess it's more exact to install using the alignment tool, but I've done it in the past with the rear main seal installed BEFORE re-installing the rear main cover, and I was still fine. Lastly, you'll also want to make sure to clean all the surfaces to the mating surfaces, including the oil pan gasket portion that the rear main cover sits on. I personally used Permatex ultra black RTV gasket maker, which is oil safe. The ultra gray version works as well, but I'm sure any high temp and oil-resistant RTV gasket maker, should do the trick just fine.

### ⭐⭐⭐⭐⭐ Review
*by A***O on 29 June 2023*

Excelente producto

## Frequently Bought Together

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-28*