This wiki has links to threads that contain relevant information on the modifications below.

m400 gear linkage mod

http://www.pistonheads.com/gassing/topic.asp?t=155...

Floor Pan Replacement

http://www.pistonheads.com/gassing/topic.asp?t=808...

Tunnel Cooling Mod

http://www.pistonheads.com/gassing/topic.asp?t=759...

Installing Electric Windows = TBA.

Fitting HID Headlight Kits

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Side Pod Oil/Air Cooler

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Front Mounted Oil/Air Cooler = Link TBA