Any good, I like the styles and prices, worried about grade of stainless living in the northeast? HP gains good??

 

I've got the Dual Extreme setup on my 5.4 FX4. It sounds great and looks cool, but I can't say I've noticed a real gain in performance.

I installed a dual swept side on my '01 with the 4.6 engine a couple years ago and noticed an improvement with that one.

hope that helped.