@jake, I got 320BHP, 5 Litres and you'll have me hands down :) - top speed (on the odometer) is 160, I think it's limited at 155. All SL500's are automatic, the version I have is 5 speed with instant kick-down. Not as raw as manual but man it goes like shite of a shovel. Me thinks I'm gonna get the the back baffles sawn off and a bespoke exhaust made. I'm assured I will get noise (Yeeeeehaaa) and kick arse performance (like I need it).
Here's a vid with the Eisenmann Exhaust (not as nice as the bespoke) : http://youtube.com/watch?v=vbHh-sAmTXg&feature=related
Here's a vid with the Eisenmann Exhaust (not as nice as the bespoke) : http://youtube.com/watch?v=vbHh-sAmTXg&feature=related