Thinking of removing 2nd cat ...
Thread Starter
Member
Joined: Mar 2009
Posts: 87
Likes: 1
09 SL63 AMG
Thinking of removing 2nd cat ...
Currently, I have stock reso with just 3" straight pipes and dual tips. (no reso-back mufflers ... 
)
And I'm thinking of removing 2nd cats ...
The qustion is ...
- Will I lose low-end torque?
- Will the sound and cabin drone be too loud?
)And I'm thinking of removing 2nd cats ...
The qustion is ...
- Will I lose low-end torque?
- Will the sound and cabin drone be too loud?
MBWorld Fanatic!
Joined: Feb 2009
Posts: 6,897
Likes: 85
From: Central WI (BFE)
SL55, ML500 & Acura TL
I removed the 2nd cats on my SL55. I did not notice any loss of low end torque and thought there may have been a slight improvement at mid and top end. It could just be the additional growl that made me think so. There is some increase in cabin noise, but not too noticeable until I get on the throttle. I'm running shorty headers with stock AMG exhaust except for the 2nd cat delete.
MBWorld Fanatic!
Joined: Sep 2007
Posts: 2,069
Likes: 3
From: South Carolina
2005 E55 ///AMG
I was always under the impression you lost low end torque doing this.
Is it only if you do both res and secondary cats at the same time? Basically leaving either the res or secondary cats in place will leave the low end torque in place?
Is it only if you do both res and secondary cats at the same time? Basically leaving either the res or secondary cats in place will leave the low end torque in place?
