I cruise on the freeway at about 2900 rpm@75mph - do you think the 4-1 header will still give me enough torque/hp to do that? I don't really want to give up my hard obtained low end torque. The engine pulls pretty hard up to 7600 right now with the old header, so I don't think I need any more top end power. I'd rather have a little more in the mid-range rpms. I heard great things about the apexi header, but the price is kinda up there. The DC header is 100 bucks less, but has larger and shorter primaries - probably a better choice for more top end. I guess you get what you pay for ( a lot of money for 1 or 2 extra hp )