What color valve seals are intake/exhaust

[pghguy517]

I have a 2008 X3 with N52 motor. What color fel pro valve seals are green and black-brown? Bought this kit and doesn’t say which valve seals are intake and which are exhaust. No instructions, can’t find anything on-line. Thanks

[80stech]

Back in the day the rule of thumb was the black (plain rubber) are the intake.

[pghguy517]

Originally Posted by 80stech

Back in the day the rule of thumb was the black (plain rubber) are the intake.

Thanks 80stech, you were right! I called Fel-Pro and they said the black ones were for valves with 5mm stem (intake), and the green ones were for 6mm stem (exhaust). I'll verify tonight, but was thinking the seals might be different size, but they sure looked the same to me.
Looked up new valves, and verifies these stem size differences.