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Buick Grand National- thicker oil cooler adapter O-ring - oil filter oring:
This is a thicker oil cooler O-ring for the 86~87 intercooled GNs and Turbo Trans Am's.This is a VERY common place to leak as the factory unit was barely adequate. Throw in another 25 years and you've got a puddle under the car!
The sale is for the oring on the right. The one on the left is a factory sized piece just for comparison.
This piece will go nicely with my Check my other listings for some cool Grand National bolt kits and MAFs!