i installed a clutch in my buddies car ..well we both did but mainly just me.. kinda my first time.. anyways we installed a stock b16a clutch outta 99 si. it was in near perfect cond. 3k miles on it..anyways installed it all started it up and we got a humming noise.. but after taken it out it went away...also there is a vibration in the clutch pedal.. its like you can feel the exaust through the peda;(ex. high rpms more vibration)anyways you think it the shiftlinkage?maybe the exaust is toughing shiftlinkage or header is loose on tranny??if you can help me out please let me know.. otherwise the whole thing was pretty simple...its a b18c in a eg..just to let ya know.. we also did a gsr front and rear susp.(i installed it all) and it stop real nice now.. much better than stock without the teg m/c and prop. valve.thanks,Randy