Well lately I've noticed a chirping coming from the serp system. Haven't really taken the time to fully diag the problem. On my Cobra I had the lower idler go bad so I replaced it with full Billetflow pieces. However on the Mach it appears to only have one smallish idler. Is there any aftermarket pieces available or is Ford my only source. Also has anyone else had to replace the idler or tensioner? I've got about 65k miles. The Cobra went bad around 13K so I'm not impressed with the Ford pieces.
