Bolt in and out cats?

**Tracker** · 09-23-2017, 07:36 PM

Hey all, I'm in Colorado with strict emissions. I want to remove my cats after I pass emissions and replace with a bolt in straight pipe until I take the test again in 2 years. Has anyone set this up? Any pictures?

**pajeff02** · 09-25-2017, 08:24 AM

The stock cats are technically a bolt in setup. No reason (ignoring the legal implications) as to why you could not simply fab a piece of pipe for each side with the appropriate bend and flanges to install in place of the cats. I am not aware of anyone who makes a "test pipe" of this nature for our cars.

**Tracker** · 09-25-2017, 12:56 PM

Originally Posted by pajeff02

The stock cats are technically a bolt in setup. No reason (ignoring the legal implications) as to why you could not simply fab a piece of pipe for each side with the appropriate bend and flanges to install in place of the cats. I am not aware of anyone who makes a "test pipe" of this nature for our cars.

Thats what I am inquiring because one Exhaust Pros wouldn't do it for me because they felt it was not worth the effort. Im sure someone has done it out there. I just wanted a pick to see how they set it up.

**sjgreen6** · 09-25-2017, 03:06 PM

You could also get a pair of used up cats and just gut them with a long steel rod then install them in place of your good cats. I believe you will also need to have your tuning adjusted so that the missing or gutted cats don't throw codes.

**Tracker** · 09-25-2017, 04:43 PM

I went to another exhaust pros and they said they could do it for $150. Gonna get it done this friday.

**pajeff02** · 09-26-2017, 03:44 PM

Have you adjusted your tune to turn off error reporting for the rear O2's?

**Tracker** · 09-26-2017, 05:13 PM

Originally Posted by pajeff02

Have you adjusted your tune to turn off error reporting for the rear O2's?

I havent had them removed yet, I will let you know.

**DarrenWS6** · 09-26-2017, 06:06 PM

I was going to say if a shop denied because 'it wasn't worth it', then the shop is not worth your payment apparently. Take your business to someone who would like it, and glad to see that you did.

Originally Posted by sjgreen6

You could also get a pair of used up cats and just gut them with a long steel rod then install them in place of your good cats. I believe you will also need to have your tuning adjusted so that the missing or gutted cats don't throw codes.

Wouldn't it still fail with that method due to the emissions pipe sniffer reading test?

**sjgreen6** · 09-28-2017, 04:42 PM

Sure but it would be simple bolt in/out and would pass during a casual visual inspection which in some states is all you need.

Wouldn't it still fail with that method due to the emissions pipe sniffer reading test?[/QUOTE]