Thanks guys. Good pics. They come with 18 disks each and adding 6 per side will make a difference in sound and performance. Maybe on the equal to like adding a K&N air cleaner or removing your mechanical fan. Adding disks adds to your top end (louder) and removing helps the bottom end (quieter).
The ones I am running are 2 1/2 inlet and I believe they are 5" outlet and they are stainless but they don't shine like those above.
