Originally Posted by ldillow

When you say poorly designed, I assume you mean for performance. My thoughts are SM Gen III will probably perform as well as most headers on the 5 to 6k range (etop, lightning). When you get to the 7k and above, very long tube headers, you will see better performance, but how much better? If I can achieve 1000hp with blower motor and gen iii, what would I see with the high end headers? 1050? I would love to use diamond marines thunder headers because I believe they are the best of both, but they don't work with the centrifical SC.