Muffler + reso Delete
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98 C43 AMG
Muffler + reso Delete
hello everybody so I just recently did a muffler delete on my c43 and it sounds amazing but I was wondering if deleting my reso would make it sound Better and if it was legal (I live in Alaska ) I can't find any info
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Hi and welcome aboard!
I have the secondary cats and resonator deleted and replaced with a straight pipe like Kowalski. I left the muffler because I don't want trouble with the guys in uniforms and vehicles with flashing lights. In any case it would be illegal in my part of the woods
I have the secondary cats and resonator deleted and replaced with a straight pipe like Kowalski. I left the muffler because I don't want trouble with the guys in uniforms and vehicles with flashing lights. In any case it would be illegal in my part of the woods
MBWorld Fanatic!
Joined: Mar 2005
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From: America
1999 C43 AMG, 2005 E55 Wagon
Did it on mine. Resonator and secondary cat delete, that is. It got louder and meaner but really isn't loud at all. A new Mustang gt is louder.
It's technically illegal for the shop to remove the cats, but not illegal to be without them unless it tampers with the o2 sensors (so dont touch the primary cats). You have to "know a guy" willing to cut it. Cost me like 125
It really isn't loud, though. But definitely sounds better anyway.
It's technically illegal for the shop to remove the cats, but not illegal to be without them unless it tampers with the o2 sensors (so dont touch the primary cats). You have to "know a guy" willing to cut it. Cost me like 125
It really isn't loud, though. But definitely sounds better anyway.
MBWorld Fanatic!
Joined: Mar 2010
Posts: 5,890
Likes: 323
From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
IMO with the secondary cats and resonator deleted, the sound when accelerating is what it should have when leaving the factory 
Also, it remains discrete when just driving around town and when you don't want to be noticed...
Also, it remains discrete when just driving around town and when you don't want to be noticed...
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Joined: Mar 2013
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From: New Zealand
C43 w/clk55 Organs
Guys, has anybody done a primary cat delete but left rest of system stock? does it increase noise much?
The C43 exhaust is straight through design, but the primary pipes especially left side look the most restrictive part!?, I have a few c43 exhausts lying around so was thinking to use the flanges/flares and remake from headers to secondary cats.
I'm an old man now don't want too much growl but still very hp hungry
The C43 exhaust is straight through design, but the primary pipes especially left side look the most restrictive part!?, I have a few c43 exhausts lying around so was thinking to use the flanges/flares and remake from headers to secondary cats.
I'm an old man now don't want too much growl but still very hp hungry
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MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
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From: America
1999 C43 AMG, 2005 E55 Wagon
In the US you absolutely can't delete primaries without screwing up emissions. It will trigger CEL with the O2 sensors.
The O2 sensors on US cars are before and after the primary cat. They measure the exhaust pre-cat and post-cat. If you delete that cat, you'll have a permanent CEL and won't pass emissions.
The O2 sensors on US cars are before and after the primary cat. They measure the exhaust pre-cat and post-cat. If you delete that cat, you'll have a permanent CEL and won't pass emissions.
Senior Member
Joined: Mar 2011
Posts: 435
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From: Mizzou
1998 C43 AMG
However, given the lack of knowledge and the fact that these cars are about 16-17 years old now, I doubt a technician would catch a missing resonator or secondary cat even on visual inspection.
I'd like to see someone from Cali's emissions #s after deleting the secondary cat. Worse case, you'd have to put it back in. But no reputable shop will remove it without replacing it with another cat.
