Mark- it actually takes a while. i clean with that 2001 stuff that comes in the green spray bottle. i spray it on a rag then wipe the tubing off. comes off great. i say i notice dirt on them about 2 months of not cleaning the motor.

Sam
1998 Contour SVT #180
1/4=14.2 @ 101.17MPH

AOL users = PhatSVT
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1986 Mustang GT
12 second club