I was reading the install guide online and saw that it says the intake and exhaust valve seals are different? When I got my valve seals from TSP last year they were all the same color. So I didn't use any rhyme or reason when installing them as far as differences. Now after reading that Im halfway thinking that might be my (what I thought was) PCV problem.

 

The brown ones are high heat. Most of the time they will only send you the high heat ones so you don't have to worry about putting the wrong one on the wrong valve.