Its a one off Hayward and Scott Exhaust...

because the Sierra has a Pro Alloy Fuel tank in the boot, Lee was able to loose the fuel tank from underneath the car and Hayward and Scott utilised this space to put two huge silencers where the fuel tank should be...







It also has a silenced screamer pipe that exits under the car and another centre box as well...

you have to be quiet to get on alot of tracks these days dontcha know!