ULTIMA GTR BUILDERS 2025
Discussion
My Ultima GTR will be hitting the Aberdeenshire road in April 2025. 5 year + build time. It finally passed the IVA Test on the 3rd attempt. 1st failure emissions and Dba too loud was the main issue. Ended up fitting switchable exhaust system. 2nd failure lights, headlight beam not correct (Ultima Factory, fitted lights in Clam) prior to delivery of the body. Ended up fitting new L.E.D lights, slight mod to light covers inside wheel arches, main issue. Minor one, wing mirrors, glass mirror extends beyond lip, sharp edge exposed on full deflection. Another minor one, helicopter windows, again sharp edge exposed when open. Don't laugh. it costs £90 for each retest. It all depends on the Inspector on the day, I also had silly things not worth mentioning. I used MACG RACING (Derby) to commission the built car, IVA Preparation. Mapping the engine LS7 modified by (Jeff Schwartz Performance) 650HP at crank, Dynoed at 552 WHP. My sincere thanks to them, such a professional company. I have 4 recommendaions to any fellow builders. 1. If using a 996 GT2 gearbox then fit a MPL slave clutch cylinder, depressing the clutch pedal was horrendous before modification. Your left leg would cramp in heavy traffic. 2nd. Fit an EPAS, remember if it's going on the road, parking would be sore on the arms. 3rd Fit parking sensors and rear camera, decent ones can be found in your Internet market place. 4th increase the padding in the seats (bum area). A good Trim shop can do this and still make the seats look standard.
Just thought I'd share a little of my experience getting the car through the IVA Test.
Just thought I'd share a little of my experience getting the car through the IVA Test.
Hi. Your car looks great, well done, they are quite a build. I heard from Ultima there was another build in Aberdeen? Never managed to make contact. Over the winter I will be fitting a Racetronic's GPS Traction Control System rear wheel braking. Handy when it rains. Inside car and engine bay pics as asked. Used Gardener Douglas AirBox cold air intake all helps. 
Edited by BILLGTR on Sunday 10th November 14:35
Edited by BILLGTR on Monday 11th November 10:53
My GTR was built primarily as a road car, so mods of comfort have also been fitted. Parking sensors, always handy. Permanent rear view camera, can switch off at night. Reverse camera, although never parked car in a car park
Wheel arch louvres supplied by Macgracing.
Air splitter, 60mm in depth, made from 9mm marine plywood, covered with carbon vinyl wrap and clear coated. Easy to repair and cheap to replace.
Barge boards 90mm approx, again made from 9mm plywood,cut width 250 mm, covered with carbon vinyl wrap and clear coated.
Racetronic traction control, a must to switch on when it rains, comes from America, 2 sensor system, HP pump actuator rear brakes. Servo assisted clutch, tired of sore left leg. Used a single circuit brake servo to drive my clutch slave cylinder. Hella UP 28 vacuum pump, vacuum switch/relay and vacuum reservoir completes installation. Clutch now so soft to depress and still feel pedal pressure.

Wheel arch louvres supplied by Macgracing.
Air splitter, 60mm in depth, made from 9mm marine plywood, covered with carbon vinyl wrap and clear coated. Easy to repair and cheap to replace.
Barge boards 90mm approx, again made from 9mm plywood,cut width 250 mm, covered with carbon vinyl wrap and clear coated.
Racetronic traction control, a must to switch on when it rains, comes from America, 2 sensor system, HP pump actuator rear brakes. Servo assisted clutch, tired of sore left leg. Used a single circuit brake servo to drive my clutch slave cylinder. Hella UP 28 vacuum pump, vacuum switch/relay and vacuum reservoir completes installation. Clutch now so soft to depress and still feel pedal pressure.
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