refined yes....quieter err no the system thats on it is a trifle lacking in the silencer dept and diverter valve wiring isn't rigged up yet..
I dont really see a comparison between my GTR and your car as your car is a no holds barred top of the line track/road car thats primary mission is to be the ultimate expression of what an EsCos can achieve in both terms of performance and track handling. The Norris Evo is something I would say is worthy of comparison with your car.
My car is a road/occasional trackday car thats fully trimmed/stereoed thats only mission is to achieve performance I notionally wanted and to be as forgiving and user friendly as possible.
Any dummy could have a GTR like mine as 98% of it is off the shelf parts whereas your EsCos is genuinely unique with cutting edge mods/one off bits plus its your own work not chequebook engineering like mine!

Cam
PS, Do I get a discount on the back brakes for bigging up your Cortina Coupe???