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      02-05-2013, 03:12 PM   #1
dghits26
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n51 engines

Is it true that n51 engines come already stock with 3 stage manifold ? So if I were to remove the cats would this be a automatic gain in power ?
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      02-05-2013, 03:23 PM   #2
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yes and yes
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      02-05-2013, 04:25 PM   #3
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That seems very simple....Do you know what the gains would get with the PE and then simply removing the cats on a n51

Would this cause any issues in the future for my car ?
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      02-05-2013, 06:36 PM   #4
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3-5 for PE, about 10 for both main and secandary cats removal.

PE wont cause any problem.

the cat will cause issue when u need smog exam done, also you need get a tune to get the setting right.

bonus part for N51, all emission related parts are covered by factory for i think 100k miles/10year N51 only special warranty.
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      02-05-2013, 07:54 PM   #5
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Quote:
Originally Posted by jc5988 View Post
3-5 for PE, about 10 for both main and secandary cats removal.

PE wont cause any problem.

the cat will cause issue when u need smog exam done, also you need get a tune to get the setting right.

bonus part for N51, all emission related parts are covered by factory for i think 100k miles/10year N51 only special warranty.
Good to know! I didn't know this, where did you get that little detail?
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      02-05-2013, 08:16 PM   #6
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Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?
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      02-05-2013, 08:21 PM   #7
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What are emission parts ?
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      02-05-2013, 08:42 PM   #8
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all the catalic converters
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      02-06-2013, 11:27 AM   #9
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Originally Posted by dghits26 View Post
Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?
N51 has the 3-stage manifold, but it also has lowered compression compared to N52 - so they pretty much even out power wise...
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      02-06-2013, 12:43 PM   #10
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Originally Posted by dghits26 View Post
Wow I didn't know that . I'm about to get a AA tune so that should help. So if n51 are so special , should they be faster out of the factory ?

BMW carefully detune the N51 to match the torque/hp with 328i N52, so they are same outta factory. however, a tune with intake, exhaust will put you same level as 330i stock.

328i N52 requires 3 stage intake in order to surpass N51 with tune.


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Originally Posted by dghits26 View Post
What are emission parts ?
all emission hoses and valves, also covers all cats.


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Originally Posted by Eagle1oh7 View Post
Good to know! I didn't know this, where did you get that little detail?
you can wiki sulev, its actually 150k miles and 15 years warranty. i think owns manual has it too in a seperate booklet.

i guess this guy got the entire fuel tank/pump replaced under sulev extended warannty.
http://chrisparente.com/2011/07/14/w...w-sulev-owner/
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      02-06-2013, 12:55 PM   #11
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all the catalic converters
I know this is OT but where are you getting your AFE dry filter for the Eurobox? I can't find it on their website. I have the Eurobox but I am currently utilizing the stock OEM filter that was supplied with it. I am not sure if I should get a K & N filter or stick with dry filters.
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      02-06-2013, 02:18 PM   #12
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I know this is OT
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
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Last edited by andrey_gta; 02-06-2013 at 02:47 PM.
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      02-06-2013, 04:58 PM   #13
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Quote:
Originally Posted by andrey_gta View Post
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
You can just buy 2 wet filters and swap for same effect :-) That is how I do it (bought an extra for $30 shipped)
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      02-07-2013, 08:35 AM   #14
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Quote:
Originally Posted by andrey_gta View Post
I got it from Amazon USA ( not the vendors on amazon) shipped to canada. They had the cheapest price for shipping & the deposit for customs seemed like a good idea. Should be getting the box in the next 24 hours, so will post impressions soon I went with dry because I can clean it without any recharge kits, i can even tap it against a flat surface to remove 40% of the dirt.
Ok, thanks I still can't find it anywhere. I guess ill just get the K & N.
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      02-07-2013, 08:41 AM   #15
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Ok, thanks I still can't find it anywhere. I guess ill just get the K & N.
This is the Dry version:
http://www.amazon.com/aFe-11-10111-A...s=afe+11-10111
http://www.amazon.com/gp/offer-listi...&condition=new

Amazon price is under $70
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