I just swaped a b16a1 into my 91 crx si and noticed that my stock manifold barely clears the subframe and it didnt bolt right up to my stock cat so i wanted to run dc 4-1 but not sure if it would clear or even have decent ground clearance so maybe get thier 4-2-1 and for which car would i order it for since it has 2 o2 sensors? 88-91 integra? 94-97 del sol dohc vtec? or 96-2000 si? i plan on taking it somewhere and have them put a new cat on too maybe have them add a bung for it?