I bought the same COP setup for my coupe as with a sheetmetal intake manifold and FPR and aftermarket fuel rail etc, you dont really have a place where to mount the stock coils and ignitor - plus the COP's are a lot neater looking IMO 8) . I was gonna use them with aftermarket CDI or dual channel ignitors with my Haltech but unfortunately the coils foul on the under braces of the coupe bonnet. Guys with sedans wont have any problems though I'd imagine, so I reckon I'd be selling my COP setup very soon, just gotta check with my mate if he wants them first.