Yeah a few ... but this isnt the place for them, those pics where just to show how far you can go and how far away from the typical " Group4" cars. The mods on the cars above still fall within the Gp4 regs 'cept the engines which would put them in Gp5 when the old Group 1-11 regs where current.

But getting back to the question , this car was running around for ages before it was linked , the only mods it had when the pics where taken was a tunnel for the T5 and an Atlas axle .

http://www.turbosport.co.uk/showthread.php?t=89478

The car was Dyno'ed at 426 BHP... was fast, but wheelspin was the norm in 3rd gear ... on a Brunters thrash day it was sideways at 100 odd mph ..
With better suspension and more grip that sideways would be converted to even more acceleration.

Also , as i'm not allowed to advertise here (other companies are out there and the pics above were for illustration purposes only) .. heres another company that is breaking the Gp4 Rally Car mould for trackday/racecars .

http://www.wealdenracing.co.uk/

Johns site is having a re-vamp at the moment but pop back and have a look at Craig Rainer's car (yellow mk2)