I wouldn't worry about sooted up exhaust pipes - Rs run pretty rich, and unless the owner cleans the tips very frequently they all get quite grotty (and can be very difficult to clean properly).
Unfortunately the standard clutch on Rs with a manual gearbox is marginal, and a lot of people have trouble with them slipping at full throttle at lowish revs (2-3000 rpm) in higher gears (eg 4th, 5th & 5th). Even more so if the ECU has been tuned for more torque. I've read that some people remove the assist spring and remove the "slow return" valve in the hydraulics to improve the clutch feel.
2017 MY18 Golf R 7.5 Wolfsburg wagon (boring white) delivered 21 Sep 2017, 2008 Octavia vRS wagon 2.0 TFSI 6M (bright yellow), 2006 T5 Transporter van 2.5 TDI 6M (gone but not forgotten).
Bookmarks