If that's your plan of attack and you want somthing you can grow into then I'd look into peacesetter's with the 1 3\4 primarys. You wont have to worry about buying a down pipe because that all come's with these headers. They are a decent middle of the road header and wont be an issue even on 400+ horse M90 builds. If your not in a big hurry watch the fourms for a set of used togs or zzp headers. They can be had used for a pretty good deal and well worth it.