Review on Fel Pro BS 40181 Rear Engine by Tim Harris

Fits like a very thick glove, just like it should. It was fairly easy to install by slightly loosening the next set of collar screws. A good tip in the instructions is to leave 3/8 inch sticking out. This helps with sealing by moving the gasket away from the main cap and also makes future replacement easier as anyone doing this can grab the end with pliers.