Hi, thanks for the comments.
When I fitted the rear wheels they were too tight and I wanted to create a car along the lines of the CTR. I dropped plumblines from my arches to the ground the used the CTR spec and noted the CTR is 1 3/4'' wider per side - not as wide as a turbo though. Then my search began.
I found a RUF 'clone' company in Germany who had one set of carbon fibre arch extensions - luckily I grabbed them.
Firstly I had to roll the arches to bring the original lip back on itself and start the widening process. the rolling also kept the original curve but the orifice of the arch had to be larger. This took two days of solid work. Once this had been done i removed the surface paint and primer to metal. I now started to work the arches to suit the extensions. Once this was done the arches were screwed onto the car to check fitment via the already drilled alignment holes.
Then I applied the bonding agent and fitted the arches properly as you only have one chance. Once the bonding cures (very little bonding used due to the almost perfect fit) there is no way the arches can be removed. As I didn't want to use filler I used just a very thin bead of resin to finish to the original body. Final finishing was done via stopper, flatted and then painted.
Would I do it again? well it took a long time but until it was finished I did think 'had I done the right thing'. Now its finished and looks superb it was well worth it.
It now measures exactly the same as the CTR's 'footprint' and body width.
The muffler is a Turbo Thomas (custom exhaust builder here in UK) CTR replica and the sound is a true replication of the CTR on near full chat, but of course without the twin turbos spinning up.
Pic to help.
Hope this helps.
Regards
Jammo.