I have an 06 F250 with a 5.4. After turning the motor off, the exhaust makes all kinds of racket (ping, ting ding, etc.) while it's cooling off. Has anyone had the dealer replace the Y pipe, etc. under this TSB?
http://www.ford-trucks.com/tsb/fullt...hp?tsb=06-20-8
The noise is no big deal, but if it's makes this much noise, I assume that the repeated heating & cooling will eventually crack the exhaust.
Is the new Y pipe more or less restrictive?