Should have gone for the schimmel 263 / 268 group buy mate, we got them at £355 a set on the corrado's they have given +20BHP in a fair few corrados, I've ran schrick 268's and they do give you a bit more top end, complimented by my schrick, BHV and my 3.68 final drive.... but pound per BHP the schimmels win hands down and they are tried and tested.