I had my E63 AMG square quad tips welded on today, but ran out of time for the Magnaflow Xpipe. Now today was the first time I actually got a chance to look under the car. Is the secondary cat the little ball right in front of the OEM resonator? Does anyone have a problem with removing the secondary cat with a CEL or anything? I'm considering deleteing that second cat if there are zero problems related to that.

 

Yes, that is your secondary cats. From what i remember, they do not have sensors so you can cut them off without a cel. just make sure your car is at full operating temperature before going in for a smog.

 

Maybe this is a stupid question... what exactly are you referring to when you say "smog"?

 

emissions test, I wouldn't F with the cat its expensive... It's up to you though.

 

Ohhh, that makes sense! We don't do emissions tests here on the island....

Actually, there is only ever an inspection required when you buy a vehicle/change of ownership I.E. if you bought a car in the 80's you could still be driving it today with NO inspection....

Shady!

 

Good thing Pennsylvania doesn't have smog tests! I mean I used to run turbo straight pipes on a few of my old cars and still got them to pass. I'm not worried about that part.

I was more worried if the car would start throwing codes.

 

Oooh, well here in CA, we have the strictest emissions test, need one every 2 years for registration. Requires a visual testing as well to make sure you dont have the cat bypass but if you know a guy to hot smog then you're good lol i'd run straight pipe if hot smog wasnt so expensive

 

No CEL because there's no sensors after the secondary cats, but also no issues because they're not even cats, just small resonators.

 

Oh I know about your nuts regulations over there. The great part is I don't even have to worry about getting pulled over for the noise because I'm a cop myself

 

Has anybody done a secondary cat delete but kept the resonator?
All I can find on youtube are either resonator delete with X-pipe or both resonator and secondary cat delete.
I find that the sound is a bit too raspy and obnoxious when both are deleted, and just a resonator delete with X-pipe is a little too quiet. So I wonder if only a secondary cat delete will be a bit louder than just resonator delete..

 

If you want your car to be louder, you should just do a muffler delete. To me when i did my x-pipes, i found literally NO difference in sound from stock. i felt (still feel) that my x pipes were a complete waste of money (about $200 in parts/labor). Then about a week later, i did a muffler delete with amg quad tips. The muffler delete really opened up the exhaust. This was exactly what i was looking for. loud with minimal highway drone. The purpose of a resonator is to reduce low frequency drone. I think with the resonators on, my minimal drone would be 3/4 of what it is now, maybe even 1/2. Now i wish that I have never put on the x-pipes. Why not change it back? because i dont want to spend anymore money on changing up the stock exhaust, am saving up for a real exhaust.

 

Heres my story.
1: did x pipe replacement of resonator. Wasn't loud enough
2: did muffler delete. Too loud
3: installed magnaflow mufflers. Sounded a lot deeper but wasn't loud enough.
4: did a secondary cat delete. Perfect!! Loudness was in between magnaflow mufflers and muffler delete.

 

Already did a muffler delete yesterday for E63 AMG square quad tips. Wasn't all that loud honestly.

 

If you could get us a sound clip that would be great!

 

Any dyno tunes done before/after exhaust changes?

 

I took out my 2nd cats as well. Which magnaflow mufflers did u go with? Im using the 11226 mufflers, its how you describe, but I think I want it a bit louder still and may try diff mufflers soon.

 

Delete.