Mr. Gasket
Rear Main Seal Fits 1986 & Later Chevrolet Small Block with 1-Piece Seal Mr Gasket
SKU: M00S 29
Description
Part #: 29
This Mr. Gasket Rear Main Seal is made from Viton Rubber. This style of rubber can handle high temperature like silicone rubber, but with superior abrasion resistance.Its durability and it's double, offset lip seal design make it recommended for applications that have high engine vacuum, like racing engines that utilize external vacuum pumps for crankcase evacuation.Repairs That Leaky Rear Main SailViton Rubber Offers Both Abrasion Resistance and High Temperature ToleranceUpgrade for Rope Seal Equipped Cars or Silicone Rubber Main SealsDetails:Emission Code: 5Material: VitonRear Main Seal Style: One PieceWarranty: Manufacturer's Limited 90 Day Warranty
Features:
- Repairs That Leaky Rear Main Sail
- Viton (R) Rubber Offers Both Abrasion Resistance & High Temperature Tolerance
- Upgrade for Rope Seal Equipped Cars or Silicone Rubber Main Seals
Fits 1986 & Later Chevrolet Small Block with 1-Piece Seal
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Mr. Gasket |
| Part Number | M00S 29 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy