Update: Had a local tuning shop drive the car and they confirmed the gearbox noise was SMFW realted and inline with what they would expect given the stiffer mounts (BFI Stage 2).
I'm about 1500 miles into new kit. Gearbox noise has quieted as the clutch and mounts have broken in. Still slightly louder than stock but worth the tradeoff.
Clutch grips even harder now than when first installed, especially in low gears. Engagement point has risen a bit since initial installation. No unusually grinding noises or problems with engagement during fast shifting under acceleration (aggresive wot pulls, or autocross). SMFW makes downshifts a breeze. Would highly recommend this kit.
First track day scheduled for early October. Will let you all know how it performs.
Now have about 350 total miles (mix city and hwy) on the new clutch kit. Chatter at idle still almost non-existent. Drivetrain noise is relatively loud while driving in 1-3 gears (usually up to 3k RPMs). Almost convinced I should take it by my mechanic again to have him make sure everything looks good. With the windows up at slow speeds, transmission noise is very noticeable (sounds like a grinding/scraping).
Can anyone confirm this is normal SMFW-related noise?
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