Originally Posted by NineMeister

On a price to performance basis there is another vote here for the B&B headers. I concur that the matching silencer is made from thin material and will eventually crack, and yes the exhaust tone will produce annoying resonance from 2500 to 3000rpm. The reason I recomend them is because I fitted a set to a blueprinted 3.2 engine which I built for my SC and in combination with a Motec engine management system with larger injectors that engine made 270hp with absolutely no internal modifications.
As Bill stated, the SSI set up will work and as I have run them on a 3.6 I think they would be a better choice if you wanted heat from the system, but for track use go with the larger diameter headers and combine it with suitable fuel and ignition improvements.