I was wondering if anyone here has bypassed their stock cat, im looking for some cheap upgrades and figured it might be worth a shot. (already have a CAI) Even if there was no power increase is there a negative impact on low end power?
You may throw a code if you don't get an O2 simulator. I bypassed the cat on both of my old 5.9's. First time i didn't do the O2 sim and threw codes (it was a DIY job). 2nd time I had my exhaust guy do it and paid to have him put an sim on it and no problems at all. Driving it home I couldn't believe the difference it made! I was impressed.
To answer your other question, I didn't notice any low end loss at all on either truck.