I was looking into the CNT downpipe + test pipe as it seemed to be the only combo with 3” piping, and a resonator (cant be too loud.) I noticed an older thread showing that the only the outer diameter was 3” and the ID was more like 2.5”. I’m sure it won’t make a huge difference, but I would like to know if there’s any good 3” inner diameter downpipes/ resonated test pipes out there. Thank you for any suggestions!!
Last edited by TSucin; 07-24-2019 at 05:55 PM.
Reason: Character issue.