Nice one Mew....
turns out "mr X" is running a VR6 conversion!

Make VOLKSWAGEN
Model GOLF VR6 HIGHLINE
Engine Size 2792
Colour BLACK
Fuel PETROL
BodyStyle 5 DOOR HATCHBACK
Transmission MANUAL
Gears 5 SPEED
Car has only had 2 owners so must be a labour of love.
I have to say the lane traffic did not allow me pull next to him to compare the performance but the valver was comfortably holding nicely behind him! I thought it might have been a poorly mapped turbo or something as he did chuck out some smoke when trying to pull away!

His engine did sound nice tho!
Goops