Tried searching the forum before posting and I couldn't find anything showing pictures or a breakout drawing of the EGR valve. Anyone know how long it would take for me to get at the EGR valve to clean it? Also for those who did the header install how long did it take? I am considering doing a preliminary inspection and cleanup of the factory cats to just determine their condition. I have been getting a bit more bothered by the noise of my car being all factory exhaust. I don't know if it is normal or not anymore. Suggestions?