Cats? Remove Or Keep
Posted 18 August 2011 - 07:33 PM
Posted 18 August 2011 - 10:14 PM
Posted 19 August 2011 - 10:04 AM
Posted 19 August 2011 - 11:23 AM
Posted 13 March 2017 - 12:33 AM
Posted 13 March 2017 - 09:15 AM
Yes, you will get CEL for P0420 & P0430 - loss of catalyst efficiency in banks 1 & 2. I'm running no cats on a magnaflow muffler and above about 1/2 throttle it gets poppy/raspy. I'm considering installing high-flow cats to see if it will reduce that.
Posted 20 March 2017 - 06:31 AM
Posted 20 March 2017 - 11:51 AM
I had lt headers, no cats and magnaflows on my truck and it sounded horrible. Drone and popping. I had to add in some resonators and x pipe and it sounds better. But unless you need to remove the cats I wouldn't.
Procharger P1SC 3.85 pulley, 4l80e swap, 3600 Circle D converter, 160 t-stat, walbro 255 in-tank fuelpump hotwired, Obx lt headers, di/do magnaflow no cats, smoked tailights, blue led gauge cluster, blue led wideband gauge, blue led boost gauge, Pioneer Nav/Dvd double din, tinted windows
Posted 09 November 2017 - 11:59 PM
Removing the cats will not gain very much, on a supercharged truck it will gain about 1+ tenths in the 1/4-m. It will make a definite difference in the exhaust, not very much louder but raspier. If you run forced induction, nitrous, or high octane fuel they must be removed or you risk melting them down; on N/A vehicles I would encourage you leave them on for legal reasons, especially if you ever resell the truck the new owner can force you to have to reinstall them (and any other emissions equipment) as a condition of sale. So if you really want to remove them, what I would do is to unbolt the factory Y-pipe and replace with a catless Y-pipe, that way for inspection or resale you can easily return the truck to original condition.
Edited by Fast04Chevy, 10 November 2017 - 12:00 AM.
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