stu they run 6 throttle bodys on them,,,, they dont run right on low revs and on short runs fouls the plugs,,,, cant be a set up issue as i had it tunned by tvr centre 3 weeks in a row,,,, all the times it was out of tune then brought back in and again, it went out of tune,, take it for a blast and it runs fine just when they are cold they run rich and so in traffic foul plugs,,,, even idling to allow you to close a garage door !