390 tube headers on a 351C? Maximum confusion

[rcadd1ct]

I used these on another vehicle. You can use stainless steel wool in between the disk to tune the sound as needed. They also have caps you can fully or partially block off the center pathway. For my application I put them in without the wool and caps and it helped kill the drone.

https://www.summitracing.com/parts/cci-3di25r

 

[torbsim]

Awesome news and help! Appreciate it so much guys