[QUOTE=Beernuts82;3102375]Take it to the dealer
12-1-10 5.0L WITH MANUAL TRANSMISSION AND A/C COMPRESSOR STRETCHY BELT CONFIGURATION - LIGHT LOWER-END ENGINE KNOCK
Publication Date: January 18, 2012
FORD: 2011-2012 Mustang
Some 2011-2012 Mustang vehicles equipped with a 5.0L engine, manual transmission and air conditioning (A/C) compressor stretchy belt configuration may exhibit a light lower end engine knock most noticeable when engine temperature is warm and the vehicle is at idle.
Refer to the Service Procedure to correct the condition.
Do you think they will give me a hard time over the CAI and tune though?
2012 Mustang GT CS Ingot Silver 3.73 Gears, Borla S type Axle Backs, BBK after cat x pipe