best downpipes for hp and tq gain?

46m3csl · 03-28-2014, 01:38 AM

Like the title says guys, best downpipes for gains. Any before and after dynos for the downpipes you guys are buying? AA downpipes, ar downpipes, rr downpipes,etc which are the top for gains on a stock car?

wildguy101 · 03-28-2014, 01:47 AM

Quote:

Originally Posted by 46m3csl

Like the title says guys, best downpipes for gains. Any before and after dynos for the downpipes you guys are buying? AA downpipes, ar downpipes, rr downpipes,etc which are the top for gains on a stock car?

I would say bms is best bang for the buck considering I have one, it's 3' so no lag, you don't need 5' DP all that would do is create lag.. I'm assuming... Don't quote me lol but without a tune I think I'm pushing roughly 10hp gain and 15tq to the crank I'm assuming.

derryck · 03-28-2014, 06:01 AM

Quote:

Originally Posted by youngpapiyabish

I would say bms is best bang for the buck considering I have one, it's 3' so no lag, you don't need 5' DP all that would do is create lag.. I'm assuming... Don't quote me lol but without a tune I think I'm pushing roughly 10hp gain and 15tq to the crank I'm assuming.

Nobody makes downpipes that big anyways and pretty much all of the offerings for the 335i are similar in design and offer similar gains. The BMS and VRSF are both quite popular and are a good bit cheaper than ARs ore some of the others but gains should be similar.

Infamy · 03-28-2014, 09:38 AM

No more BMS dwn pipes, look into vrsf

wildguy101 · 03-28-2014, 09:55 AM

Quote:

Originally Posted by derryck

Quote:

Originally Posted by youngpapiyabish

I would say bms is best bang for the buck considering I have one, it's 3' so no lag, you don't need 5' DP all that would do is create lag.. I'm assuming... Don't quote me lol but without a tune I think I'm pushing roughly 10hp gain and 15tq to the crank I'm assuming.

Nobody makes downpipes that big anyways and pretty much all of the offerings for the 335i are similar in design and offer similar gains. The BMS and VRSF are both quite popular and are a good bit cheaper than ARs ore some of the others but gains should be similar.

CPE does

bigdaddycane · 03-28-2014, 10:03 AM

N54 Tuning sells d0wnpipes now....look to be the same quality as what BMS use to sell.

http://www.n54tuning.com/index.php?_...&productId=150

derryck · 03-28-2014, 10:07 AM

Quote:

Originally Posted by youngpapiyabish

CPE does

No they don't...as (5') is 5 feet.

wildguy101 · 03-28-2014, 10:07 AM

Quote:

Originally Posted by derryck

Quote:

Originally Posted by youngpapiyabish

CPE does

No they don't...as (5') is 5 feet.

Correct 5inch

46m3csl · 03-28-2014, 11:05 AM

Also guys am not sure but some of these down pipes dont come with like a flunge or something and they are bolted agaisnt the turbo or something? Also most of these are catless right and they well cause drone more or less?

wildguy101 · 03-28-2014, 11:08 AM

Quote:

Originally Posted by 46m3csl

Also guys am not sure but some of these down pipes dont come with like a fkunge or something and they are bolted agaisnt the turbo or something? Also most of these are catless right and they well cause drone more or less?

N55 or n54?

46m3csl · 03-28-2014, 12:15 PM

n54

bigdaddycane · 03-28-2014, 12:17 PM

Quote:

Originally Posted by 46m3csl

Also guys am not sure but some of these down pipes dont come with like a fkunge or something and they are bolted agaisnt the turbo or something? Also most of these are catless right and they well cause drone more or less?

what?!?!?

a few brands (AA is one) that has a flange which is not needed for support as aftermarket DPs need to move somewhat (with the car) since they do not have the flex neck near the top of the DP (Akrapovic does but they cost a bazillion dollars). Most aftermarket DPs do not run a support flange.

Drone comes down to the cat-back system the car is running (stock or aftermarket). If you keep your secondary cats on, there is no drone. E92's can drone with DPs because they don't have the secondary cats. Welding in resonators can fix that right up.

46m3csl · 04-22-2014, 09:26 PM

am still not sure which to get yet at all guys lol/ I know I ll get flamed for asking this, can downpipes damage the turbos or decrease their long term ability?

Tiago@VRSF · 04-22-2014, 10:34 PM

Downpipes generally increase the lifespan of the turbos due to the release of back pressure

stanlalee · 04-23-2014, 08:14 PM

as far as power goes a catless downpipe is a catless downpipe. Even 2.5" or gutted stock flow plenty for each 3cyl bank. Buy based on fitment/quality/price etc. Basically buy based on everything but which makes the most hp. a single 2.5" DP can and do support 300whp all the time (I come from turbo 4cyl) and I've seen COUNTLESS 500-600whp thru a single 3" DP so all your really wanting to do is remove the cats as sizing is more than enough for anything your likely to throw at it. everything else related to size (full 3", tapered etc) is just sales jargon. I get a real kick out of the massive 4" N55 DPs for all whopping 350whp ceiling.

03-28-2014, 01:38 AM	#1
46m3csl Captain 127 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	best downpipes for hp and tq gain? Like the title says guys, best downpipes for gains. Any before and after dynos for the downpipes you guys are buying? AA downpipes, ar downpipes, rr downpipes,etc which are the top for gains on a stock car?
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03-28-2014, 09:38 AM	#4
Infamy underground 69 Rep 333 Posts Drives: alpine white 335 E92 Join Date: Aug 2013 Location: central Jersey iTrader: (1) Garage List 2010 BMW 335i [9.66]	No more BMS dwn pipes, look into vrsf __________________
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03-28-2014, 10:03 AM	#6
bigdaddycane I even mod my cereal 268 Rep 3,480 Posts Drives: 11 ZCP DCT M3 14 328d 21 GT4 Join Date: Aug 2009 Location: Northern Va iTrader: (53) Garage List 2021 Porsche GT4 [0.00] 2014 BMW 328d Xdriv ... [0.00] 2011 BMW M3 [0.00]	N54 Tuning sells d0wnpipes now....look to be the same quality as what BMS use to sell. http://www.n54tuning.com/index.php?_...&productId=150 __________________ 2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins 2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads 2021 718 Cayman GT4 - Fire extinguiser, Neodyme GT3 Wheel Color
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03-28-2014, 11:05 AM	#9
46m3csl Captain 127 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	Also guys am not sure but some of these down pipes dont come with like a flunge or something and they are bolted agaisnt the turbo or something? Also most of these are catless right and they well cause drone more or less? Last edited by 46m3csl; 03-28-2014 at 12:15 PM..
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03-28-2014, 12:15 PM	#11
46m3csl Captain 127 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	n54
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04-22-2014, 09:26 PM	#13
46m3csl Captain 127 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	am still not sure which to get yet at all guys lol/ I know I ll get flamed for asking this, can downpipes damage the turbos or decrease their long term ability?
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04-22-2014, 10:34 PM	#14
Tiago@VRSF 2108 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	Downpipes generally increase the lifespan of the turbos due to the release of back pressure
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04-23-2014, 08:14 PM	#15
stanlalee Major 261 Rep 1,093 Posts Drives: 07' E92 335i manual Join Date: Oct 2013 Location: Newport News, Va iTrader: (0)	as far as power goes a catless downpipe is a catless downpipe. Even 2.5" or gutted stock flow plenty for each 3cyl bank. Buy based on fitment/quality/price etc. Basically buy based on everything but which makes the most hp. a single 2.5" DP can and do support 300whp all the time (I come from turbo 4cyl) and I've seen COUNTLESS 500-600whp thru a single 3" DP so all your really wanting to do is remove the cats as sizing is more than enough for anything your likely to throw at it. everything else related to size (full 3", tapered etc) is just sales jargon. I get a real kick out of the massive 4" N55 DPs for all whopping 350whp ceiling.
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