When I started my mods, I bought the pace setter header. With this header you have to cut your down pipe and weld on the collector. It's not bad. Better than stock. But not great. However I wanted a true long tube header so I purchased the Weapon R 4-2-1
Before I installed it I welded the 2 pieces together. Installation is a bitch. You have to drop the sub frame.
The power increase was worth it. I research the weapon r and the jbp. Dollar for dollar I think you get better luck with the weapon r. The pace setter is not on the same playing field as the others