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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > What do you think? Exhaust Mod



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      12-17-2013, 07:22 PM   #1
Dylanize
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What do you think? Exhaust Mod

So completely randomly this just popped in my head.

What do you guys think about putting in a "Y" pipe after the headers, single pipe all the way back into my AA exhaust?
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      12-17-2013, 07:52 PM   #2
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      12-17-2013, 07:55 PM   #3
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Quote:
Originally Posted by andrey_gta View Post
Yeah that's kinda what inspired me, because i was thinking about a res delete as well, then I was like, fuck it what if i just went single pipe to an AA exhaust, I think it would sound badass, probably have a slight hp gain as well.
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      12-17-2013, 08:20 PM   #4
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The Y pipe is for sale.
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      12-17-2013, 08:29 PM   #5
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Quote:
Originally Posted by TheAxiom View Post
The Y pipe is for sale.
It was made for an E46 wasn't it?
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      12-17-2013, 08:51 PM   #6
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technically yes, but I was planning to use it on my car. The specifications for the merger should be nearly similar to the N52, with the only difference being the pipe spacing. I'm selling it to raise money for more mods.
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      12-17-2013, 09:52 PM   #7
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I'm anxious to see how it would sound. I was thinking the same thing last night of trying this in the spring with that y pipe
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      12-18-2013, 12:41 AM   #8
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Good luck buying the collector, Burns will give you a better price if you can give them the specs and get a Group buy going. Or you could just buy mine.
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      12-18-2013, 01:03 PM   #9
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Good luck buying the collector, Burns will give you a better price if you can give them the specs and get a Group buy going. Or you could just buy mine.
Probably just gonna have it custom fabricated, thanks tho.
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      12-18-2013, 01:18 PM   #10
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so basically a custom headerback? you won't pass smog just fyi though lol (well I don't know about ur state rules, but CA for sure you won't pass)
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      12-18-2013, 03:07 PM   #11
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Quote:
Originally Posted by KwlAznKid
so basically a custom headerback? you won't pass smog just fyi though lol (well I don't know about ur state rules, but CA for sure you won't pass)
Why wouldnt he pass if he keeps the cats
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      12-18-2013, 03:45 PM   #12
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Why wouldnt he pass if he keeps the cats

he'd have to keep all 4 cats to pass the visual test. In CA, you can't modify the factory emissions system, which has 4 cats in our cars.

Now weather or not the smog tech actually checks everything under the car, is a different subject but if your car sounds like it has a modified exhaust, they are probably more likely to check.

but he's in NC, so he probably has nothing to worry about.
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      12-22-2013, 11:09 PM   #13
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Quote:
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Originally Posted by Kirkies328 View Post
Why wouldnt he pass if he keeps the cats

he'd have to keep all 4 cats to pass the visual test. In CA, you can't modify the factory emissions system, which has 4 cats in our cars.

Now weather or not the smog tech actually checks everything under the car, is a different subject but if your car sounds like it has a modified exhaust, they are probably more likely to check.

but he's in NC, so he probably has nothing to worry about.
Ok. I have a muffler delete on my car with a charcoal delete on my stock intake would i still pass smog? Thanks
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      12-23-2013, 01:35 AM   #14
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Yes.

Unless you don't keep up with regular service intervals that is...

They started this new(ish) program here in Colorado a few years ago where you drive by roadside smog testing vans that use cameras to tag you smog signature to your license plate. I haven't had to visit a single smog station since they introduced the roadside testing. I get a slip in the mail every year saying my car passed the sniffer and I have the exact same mods as you do.
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