Hi all, I have an early 260Z, and will eventually build up an all out turbo L28ET to drop in. For the time being, since the rest of the car needs attention, I will be spending more money there. I will freshen up the L26 with flat top pistons, port match the head, and keep the stock 260 cam, rods, crank etc. The car came with dual Weber DGV's, but may snag some triples. My question is, have any of you actually gained much over the stock manifold with headers? Also would a 3" exhaust kill any low end power? I don't really want to redo the entire exhaust when I go turbo, but will if need be. Keep in mind I will probably drive it this way for a couple of years while I build, and collect all the parts for my all out turbo motor.