You guys will love this...
http://www.trackdaycam.co.uk/Milltek...tleCombeX5.wmv
I was there going round in my M3 CSL and watched Thorney catch and then pass the Caterham. His 4.8is sounded awesome and was noticeably quicker lapping than a Jaguar XK8 that was also on track at the time. What an amazing car, with better brakes he could have lapped all day. Try that in your typical SUV... :p
p.s. the exhaust is the one I've referred to in the past that Thorney Motorsport have developed together with Milltek. I had a drive around the carpark and if you love the sound of the 4.8is then you'll love it even more with one of these.