Yingjie Xu

Hey! I’m a bit confused with “the cheapest mod” on the GT, which is the secondary cat delete. My need is just to make the car louder. Besides cat delete, do I need to to remove the resonator as well?

If someone knows where can I get this job done in SoCal, please comment down below! (Orange County & San Diego)

Much appreciated!!!

Tinknocker

Had mine all apart to delete lower cats. There isn't a resonator on the gts.after the second set of cats it's straight through with valves open.
2 ways to delete ,cut open and clean or like i did which requires some with sheet metal and welding skills or just cut pipe and remove cat all together.
See attached photos

Cleaned out

Orcbolg

I'm not aware of any other sound dampening part of the exhaust systems, past the 2nd cats, besides the muffler (which is only use when the valves are closed).

Tinknocker

No you are incorrect , they are cats as they have platinum in them ,very difficult to remove.A resonator usually is straight through with only a little packing on the sides.

AMG 17GT

Secondaries are both resonator and cat....

emericr

Do a search. easiest mod and best bang for your buck

t3flondon

I recommend cutting the secondary by the front and back pipe clean, not cut out, just in case you need to replace it to sell, it will be easier and cleaner.

Mike Almeyda

Hey how long did It take a Scott’s ? I want to book an appt ? We’re they busy ?

Skilly

Nobody in SoCal will do it and tell you about it on the forum. Doing so, that shop will get shut down and fined heavily. In this nanny state it is 100% illegal to mess with your emissions like this. Go and talk to someone in the car mod community offline and out of the eye of the public - you likely won't get an answer about a shop in Southern California doing that kind of job. Loose lips sink ships!

Mike Almeyda

thanks skilly but I’m kinda far from Cali! Hot rod Scott’s is in toronto..

Tinknocker

Yes skilly is 100% correct ,big exhaust manufacturers are getting wacked for exhaust mods , flowmaster ,borla . Diesel bros shop got hit with 800k fine for emissions bypass stuff. Last car Mercedes gts I traded in had to sign affidavit saying no exhaust mods done.Crazy times now.

Skilly

ha! I was reading the OPs ask not realizing that its months old. Im originally from BC and they werent far behind California with their smog check stations and emissions checks. That said, I would have thought a big metro like Toronto would be doing the same thing.