Hey all, I want to take care of the clatter due to the variable valve timing sprocket, or the camshaft phasers on my 05 Expy. At this point in time, its only the right side that is making the noise. My Expy has 180K miles on it. I have yet to change the plugs, (fyi). Anyway, should I get Ford parts, or go for the after market brands? As for the after market replacements, is there one that is just as reliable as the oem? Also, should I replace both, or just the noisy one? I started to do some research on them, but didn't recognize any of the replacement brands except for Dorman. Thanks for any help and info.