Just curious here on AU XR8 differences amongst eachother. What were the engine differences and parts/performance for all three XR8's?

i.e. all GT40P heads I presume and explorer intake, 24# injectors etc but what else if anything? Different cam?

Head over to AUfaclon.com they might have the info

i knwo the 220kw had a better exhaust,roller rockers and cam, and 24p# injectors
S1 had basick gt40 heads and bog stock exhaust and stnadard cam