Headers + Pipes!
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 47
Likes: 0
From: CA
'13 C63 Sedan
Headers + Pipes!
Hi friends, I just had a question about headers and piping.
I have a p31 already, so I may go with headers /straight pipe resonator/ and x pipe for 2nd cats before a tune... is there any other mod I am going to need in order for this to work without any problems? and.. will smog tests pass? thanks in advance!
I have a p31 already, so I may go with headers /straight pipe resonator/ and x pipe for 2nd cats before a tune... is there any other mod I am going to need in order for this to work without any problems? and.. will smog tests pass? thanks in advance!
MBWorld Fanatic!
Joined: Oct 2012
Posts: 3,704
Likes: 19
From: Denham Springs,LA
'12 C63 Black Series, '12 ML350 BlueTech
If you go with headers you'll need a new tune for sure.
Usually people install headers with Xpipe in place of 2nd cat for better HP gains. You can keep the resonator and catback or go with custom mufflers. But it will be extremely loud. Headers are originally loud.
As for the smog test I think it wont pass but I might be wrong.
Usually people install headers with Xpipe in place of 2nd cat for better HP gains. You can keep the resonator and catback or go with custom mufflers. But it will be extremely loud. Headers are originally loud.
As for the smog test I think it wont pass but I might be wrong.
Senior Member
Joined: Jun 2012
Posts: 420
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From: Los Angeles, CA
C63, 335i
You'll definitely need a tune after installing headers for the engine to run right.
Headers will be loud but there are ways around that to quiet it down. The stock exhausts are like megaphones so you can either get an exhaust with a valvetronic flap or get resonators. The thing with aftermarket exhausts are some people say they drone while others say they don't.
Without cats there's no way your car will pass smog but I don't think you need to smog the car until 5 years down the line in CA.
Headers will be loud but there are ways around that to quiet it down. The stock exhausts are like megaphones so you can either get an exhaust with a valvetronic flap or get resonators. The thing with aftermarket exhausts are some people say they drone while others say they don't.
Without cats there's no way your car will pass smog but I don't think you need to smog the car until 5 years down the line in CA.
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 47
Likes: 0
From: CA
'13 C63 Sedan
You'll definitely need a tune after installing headers for the engine to run right.
Headers will be loud but there are ways around that to quiet it down. The stock exhausts are like megaphones so you can either get an exhaust with a valvetronic flap or get resonators. The thing with aftermarket exhausts are some people say they drone while others say they don't.
Without cats there's no way your car will pass smog but I don't think you need to smog the car until 5 years down the line in CA.
Headers will be loud but there are ways around that to quiet it down. The stock exhausts are like megaphones so you can either get an exhaust with a valvetronic flap or get resonators. The thing with aftermarket exhausts are some people say they drone while others say they don't.
Without cats there's no way your car will pass smog but I don't think you need to smog the car until 5 years down the line in CA.
