I think people are a little misinformed here when it comes to *turbo* cams. When a turbocharged car has cams specifically made for them, there is very little overlap, maybe as much as a stock cam (which would mean no loping). The reason the turbo cams have little overlap/duration is because if the duration is too high the pressurized air/fuel mixture can gat pressurized directly out of the combustion chamber and out the exhaust. A good turbo cam instead uses high lift to achieve hp (which in most instances would require valve springs but I don't think it would be necessary on our cars due to a low redline). On a NA car, cam gears are often used to move the powerband to dufferent places in the RPM, but on a turbo car (with dohc) you have the added bonus of being able to advance the intake cam, and retard the exhaust cam, making less overlap, and therefore less loss of pressure. Therefore they can help you use a higher duration cam than normal, or more efficiently use you current turbo cam.
I have heard that the exhaust ports are very small in the srt4, so I'm sure that there is good power to be had as well as increased turbo response in at least a good exhaust cam.
