bought a 2014 raptor - fun truck Back Story Got around to re-installing the K&N Cold air Intake and AFE throttle body spacer (re-installing, because I bought truck with them - yet dealership didn't keep them on once i started buying their Service Dept forced them to restore back to factory - I requested the parts and got them - this also included aftermarket exhaust - so I now have New Resinator > muffler - kept new tail-pipes) Mostly Concerned a loose vacuum line but sounds so metallic vs air whistle Truck has 62K on it - Do notice some front end slop - Ball Joint / Bushings / Hub - tie rods seem pretty solid. mostly clunks on small bumps. TLDR - Truck makes a really bad metal to metal sound when turning Right Only Right turns only above ~15mph and more than ~15-20 degree turn - (faster less turn) Noise is similar to a brake dust shield scraping something - and haven't ruled that out yet. doing right turn and backing up ~10mph in circle can replicate - Hard straight acceleration makes a similar noise and can't tell if its more a suspension issue.. If Air Intake Related - why only right turns and at specific suspension angles? Suspension - that much noise - almost sounds like I should be able to see fresh metal scrapes and not seeing any. ....... LOL - Spent all this time and here is the exact sound and reason.. ----- Now just to locate which vacuum line. Expecting same one that was disconnected & re-connected to air intake - got loose at opposite end apparently one of the tests is going into 4x4 and noise stops = Vacuum line otherwise more searching!