I'm getting Felpro SS72876 valve seals installed on the exhaust valves. The kit came with both O rings and nylon "umbrella" seals. The factory only used O rings on the exhaust valves. Should I have the nylon seals installed also in addition to the O rings?
My mechanic spoke to a Felpro tech and was suggested to use both the O-ring and the umbrella seal on each exhaust valve, so I will go with that suggestion.