: cat delete turn on check engine light

06-19-13, 04:22 PM
Hi I'm new to this forum n I had a question I have an 07 cts v with an k&n and muffler delete n I was thinking of doing a cat delete but would my check engine light turn on and if it does is ther any way to turn it off

06-19-13, 04:25 PM
1. Yes.

2. Yes, with a tune. Tuners usually charge from nothing to $100 to turn it off.

06-19-13, 04:28 PM
And would it make any diffrence as in power or sound

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06-19-13, 05:08 PM
With my '09, deleting the main cats (rear ones) made a big difference in sound. Had em put back in, retuned, and only lost a little over 1 RWHP.

06-19-13, 05:33 PM
Power gain won't be all that much. Depending on where you are located, the fines for cat removal are pretty big.

06-19-13, 06:15 PM
You want to do a cat delete along with a muffler delete? That is going to be loud as hell

06-19-13, 07:04 PM
Get headers too while you're at it. I drive my car with headers, no cats, and open cutouts where the cats would be all the time. 'Tis a bit loud, but oh well. Or just get headers since they actually improve power, whereas other exhaust mods just make more noise.

06-19-13, 11:26 PM
i had hollow cats and muffler delete and it wasn't extremely loud.

06-20-13, 12:07 AM
I really wana delete cats but its just the check engine light that makes me think about it I don't wana b seein a yellow light on all the time

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06-20-13, 07:48 AM
I was thinking of doing a cat delete but would my check engine light turn on
You're in luck! Unlike every other emissions controlled vehicle sold in the modern era, due to a silly oversight by the GM engineers who programmed the V's ECM, the CEL won't come on if you remove the cats on your CTS-V.

06-20-13, 10:56 AM