I just got my cat back put into in my DC2 VTIR. 2.25" mandrel bent custom cat back, 1 resonator into 4" outlet canon. Only other mods I have is Injen RD1450 intake.

Anyways, I've noticed the sound difference isn't noticable anymore when I hit 5800 (previous VTEC kick in point). Now I get a very noticable lift at 4700 but when I go past ~5800, no sound difference at all. It does sound pretty crazy though.

Is it possible the exhaust has changed my VTEC point? Or is this normal and my VTEC is still coming in ~5800 as normal?

And if I can ask a completely different question. On idle, the car makes a very noticable rattling sound. Upon investigation, it's the rear bar vibrating. Only happens on idle. Whats the fix for this? Can I put something in between the rear bad and the canon? Piece of Dynomat sound deadening maybe?

Thanks,