Review: 2nd Cat Delete
05-19-2017, 07:10 PM
#1
Member
Thread Starter
Review: 2nd Cat Delete
Let me start by saying, I just got my secondary cats deleted a few hours ago and... WOW! It definitely makes a noticeable difference.
On a whim after work, I decided to head down to a local muffler shop to ask about getting these cats removed and putting straight pipe in their place. We put the car on the lift and took a look... After only 30 seconds, he realized how simple this was going to be. "I'll do it for $80." At only 80 bucks, I couldn't refuse.
30 minutes later, he lowered the car down and I started it... At first, I was very unimpressed. It sounded exactly the same as when I pulled in. Mind you, the engine was obviously still warm, so it was idling normally at 800ish RPMs. So I revved it up...
This things screams above 3500-4000 RPMs! It sounds like a gift from the V8 gods LOLOL. Happy with my investment, I paid the man and drove off. Being from NYC, there was a s*** ton of traffic heading home during rush hour. Driving through the 20 minutes of traffic, you'd be hard-pressed to hear the difference between a stock 63 and one with the 2nd cats removed. It wasn't until I cleared the traffic that I was able to open up this little ****...
I slammed on the gas and banged through 2nd to 4th. Like I mentioned earlier, it isn't until you hit 3500-4000 RPM that you really hear the difference. It's a violent and slightly offensive sound in the higher RPMs. And in no way am I saying, by offensive, that it's bad. It's a throaty tone, just as it was before. But in the higher RPMs, it sounds more mechanical and less restrained. It's as if this is what the car wanted from the beginning!
As for perfomance gains... Sure, you can say you feel a difference, but I wouldn't be too sure that it isn't just the rush of having a new part installed on your car. You're looking for a difference, you'll find it. But so far, my butt-dyno says there's definitely a bit more umpphh when it goes, especially in the lower RPMs.
All in all, just like MANY other threads have said, this is probably one of the best bang-for-buck mods you can do to the car. While driving like a human being, it sounds exactly the same as it did before. In my eyes, this only adds to the value this mod brings. After having gone through the phase of having loud and in-your-face cars, the comfort of having the ability to drive like a regular car is welcomed. At less than $100, the happiness it brings is bar-none. I've driven the car for a total of an hour and half since getting the pipes installed and no CEL. If someone asked if I'd recommend this to another 63 driver, I would in a heartbeat.
I'll try to post a quick video this weekend
Also, I have a before video of the car revving so I'll be able to do a before and after.
On a whim after work, I decided to head down to a local muffler shop to ask about getting these cats removed and putting straight pipe in their place. We put the car on the lift and took a look... After only 30 seconds, he realized how simple this was going to be. "I'll do it for $80." At only 80 bucks, I couldn't refuse.
30 minutes later, he lowered the car down and I started it... At first, I was very unimpressed. It sounded exactly the same as when I pulled in. Mind you, the engine was obviously still warm, so it was idling normally at 800ish RPMs. So I revved it up...
This things screams above 3500-4000 RPMs! It sounds like a gift from the V8 gods LOLOL. Happy with my investment, I paid the man and drove off. Being from NYC, there was a s*** ton of traffic heading home during rush hour. Driving through the 20 minutes of traffic, you'd be hard-pressed to hear the difference between a stock 63 and one with the 2nd cats removed. It wasn't until I cleared the traffic that I was able to open up this little ****...
I slammed on the gas and banged through 2nd to 4th. Like I mentioned earlier, it isn't until you hit 3500-4000 RPM that you really hear the difference. It's a violent and slightly offensive sound in the higher RPMs. And in no way am I saying, by offensive, that it's bad. It's a throaty tone, just as it was before. But in the higher RPMs, it sounds more mechanical and less restrained. It's as if this is what the car wanted from the beginning!
As for perfomance gains... Sure, you can say you feel a difference, but I wouldn't be too sure that it isn't just the rush of having a new part installed on your car. You're looking for a difference, you'll find it. But so far, my butt-dyno says there's definitely a bit more umpphh when it goes, especially in the lower RPMs.
All in all, just like MANY other threads have said, this is probably one of the best bang-for-buck mods you can do to the car. While driving like a human being, it sounds exactly the same as it did before. In my eyes, this only adds to the value this mod brings. After having gone through the phase of having loud and in-your-face cars, the comfort of having the ability to drive like a regular car is welcomed. At less than $100, the happiness it brings is bar-none. I've driven the car for a total of an hour and half since getting the pipes installed and no CEL. If someone asked if I'd recommend this to another 63 driver, I would in a heartbeat.
I'll try to post a quick video this weekend
Also, I have a before video of the car revving so I'll be able to do a before and after.
Last edited by Nando_514; 05-19-2017 at 07:15 PM.
The following 3 users liked this post by Nando_514:
05-20-2017, 01:28 AM
#2
MBWorld Fanatic!
I've done the exact same, and I would say its all pretty accurate and well described, except I don't think it makes a performance difference.
Just as mild and civilized when you want it to be, but step on the loud pedal and its angrier than ever, without losing any tone or growl. And zero drone.
Just as mild and civilized when you want it to be, but step on the loud pedal and its angrier than ever, without losing any tone or growl. And zero drone.
05-20-2017, 01:55 AM
#3
MBWorld Fanatic!
I've done the exact same, and I would say its all pretty accurate and well described, except I don't think it makes a performance difference.
Just as mild and civilized when you want it to be, but step on the loud pedal and its angrier than ever, without losing any tone or growl. And zero drone.
Just as mild and civilized when you want it to be, but step on the loud pedal and its angrier than ever, without losing any tone or growl. And zero drone.
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Infiniti (06-21-2017)
05-20-2017, 10:07 AM
#5
MBWorld Fanatic!
Agree, absolutely best mod in my book, you will also notice it a bit more on cold start and idling right after a cold start it sounds soooo good, but then eventually settles down after a few minutes and sounds stock again.
05-20-2017, 11:14 AM
#6
Super Member
What combination of secondary cat/resonator can let the c63 keep the beastly sound after cold start and idle? What should I go for if I want it to sound mean and scary all the time? Not just at open throttle
05-20-2017, 12:31 PM
#7
MBWorld Fanatic!
You can pull the secondary cats and resonator (although removal of the resonator will also change the sound at some frequencies and may add drone on the highway), after that, headers will make it stupid loud!
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05-20-2017, 12:45 PM
#8
MBWorld Fanatic!
IMO, even catless LTHs is kind of tame. It's not like a coyote motor with headers and an exhaust. I feel like unless you are WOT, it's still kind of quiet. People notice downshifts or semi-aggressive acceleration, but normal acceleration, cruising and idling is pretty sleeper.
05-20-2017, 02:35 PM
#9
Super Member
IMO, even catless LTHs is kind of tame. It's not like a coyote motor with headers and an exhaust. I feel like unless you are WOT, it's still kind of quiet. People notice downshifts or semi-aggressive acceleration, but normal acceleration, cruising and idling is pretty sleeper.
05-20-2017, 02:56 PM
#10
MBWorld Fanatic!
05-21-2017, 03:00 PM
#11
MBWorld Fanatic!
Glad to see OP is enjoying this mod. I did mine about 2-3 weeks ago and I don't think my radio has been on since. Perfect mod to get that louder sound when you want it but can be normal and quite all other times.
05-21-2017, 03:20 PM
#12
MBWorld Fanatic!
05-21-2017, 03:32 PM
#13
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Join Date: Nov 2014
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'13 C63 AMG P31
Hahaha, I know exactly what you mean. Try downshifting when you are next to a large vehicle...the sound will resonate off the vehicle and make you pee a litttle.
05-21-2017, 03:38 PM
#14
MBWorld Fanatic!
This is actually better to do (or at least more enjoyable) when beside a new C43, ummm I mean C450. Or is it a C400? D'oh. All da same. Nice to educate all of them.
05-21-2017, 05:21 PM
#16
MBWorld Fanatic!
They keep say BMW does it too, but really they sell pieces and call it M Sport. They don't badge the model number With an M, so that's different.
C43 violates the "one man, one motor" credo so right there that's a non starter for me.
C43 violates the "one man, one motor" credo so right there that's a non starter for me.
Last edited by 604 C63; 05-21-2017 at 05:32 PM.
05-21-2017, 06:07 PM
#17
MBWorld Fanatic!
I hate both AMG and M for doing that. But for some reason I feel like M does a better job differentiating the flaccid "M" cars.
05-22-2017, 03:50 PM
#19
MBWorld Fanatic!
I have noticed sunroof tilted also picks up more noise from the rear, even more than the windows down it seems, so I drive like that a lot!
05-22-2017, 05:55 PM
#20
Member
05-22-2017, 11:04 PM
#21
MBWorld Fanatic!
05-22-2017, 11:55 PM
#22
MBWorld Fanatic!
I'm not talking about idle. I cruise at like 90 here in CA and it drones just a tiny bit. And occassionally I think the tone could be a little deeper like the original AMG exhaust note. Don't get me wrong. I love having headers. But sometimes I want to just relax and crush some miles. Ever climb a steep hill at 90 on the freeway? It's hard to have a conversation.
Last edited by chrisridebike8; 05-22-2017 at 11:57 PM.
05-23-2017, 08:28 AM
#23
MBWorld Fanatic!
I'm not talking about idle. I cruise at like 90 here in CA and it drones just a tiny bit. And occassionally I think the tone could be a little deeper like the original AMG exhaust note. Don't get me wrong. I love having headers. But sometimes I want to just relax and crush some miles. Ever climb a steep hill at 90 on the freeway? It's hard to have a conversation.
A solution to your problem is just to back off the throttle a tad to 85 mph during steep grades while having a conversation. :-)
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chrisridebike8 (05-23-2017)
05-23-2017, 11:07 AM
#24
MBWorld Fanatic!
You'll have the same issues with having a conversation driving up a grade with your secondary cat deletes (albeit less of the noise). The xpipe nulifies the drone below 3k rpms, but going up a steep grade while doing 90 will put you above 3k. 2nd cat deletes is such a tease, more noise without the increase in power...
A solution to your problem is just to back off the throttle a tad to 85 mph during steep grades while having a conversation. :-)
A solution to your problem is just to back off the throttle a tad to 85 mph during steep grades while having a conversation. :-)
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AMG3.2 (06-21-2017)
05-23-2017, 11:10 AM
#25
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Thread Starter
