[-=Jeff=-]

I will let Dom explain his set-up but most the guys here have the NPP Valves with slightly different pieces:

One guy has a B&B with a Stainless Works X-pipe and NPP With B&B Mufflers/tips..

Another is B&B 3" pipes, Custom resonator/ X-pipe with Dynomax mufflers with NPP and Z06 tips

Now I know most search out the Z06 muffflers and use the tips/valves, but I have seen the valves on eBay for about $100 each

I am the black sheep of the FBI group.. motor is still mostly stock and I am using Corsa. I have no drone at all.

Now, drone is very subject and depends on the person. Dom's car still has some drone ( to my ears) but not nearly as bad as without the NPP Valves. My ears are quite sensitive (genetics unfortunately) so for me the Corsa fits the bill and I think if you heard Dom's or any of the others here it would help you decide if that is the way you want to go