There weren't that many changes made for the facelift of the R53. The 2006 will have a transmission which is geared for slightly better acceleration. The 2004, since it has the JCW Tuning Kit, will have the improved 5th Gen Eaton supercharger like the 2006. The 2006 will have to be fitted with a 15% reduction pulley, smaller drive belt and colder plugs to attain similar horsepower to the 2004.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.