hi anyone installed those k&n filters to their cars yet? how is the performance and fc has change for the car./

oh yeah im using alternator booster. works great mang

1. The braking sound you mention was it the ABS sound when you do a hard braking?
what car have you been driving before a preve..

2. C-Pillar sound? i got that same sound on the REAR left. sound is more noticeable when you open the seats.

3. Overcrank sound? one way valve is how they guess the problem and never properly restify.
it could be the electronic/electrical start up system thats causing the overcrank sound.
ONE WAY VALVE is to control oil from flowing n making the engine oilless in the morning
I dont think this has to do with overcrank sound.. the SC can never give me a good explanation when i ask them in a very technical manner. Im a field technician and i deal with Banking automation such as ATM.
.

helicopter sound? maybe the rotor has warp or something.. check if there are scratches or the rotor is bend somehow
this happens when you hit thru a pool of water when the rotor is hot.
the metal expands n warp or something
gotta get it rma