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      09-21-2010, 04:51 PM   #1
BerkTechnology
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Berk Technology N55 Street Performance Exhaust Dyno Numbers!!!

The first independent dyno results we've seen for our Street Performance N55 exhaust systems are in! They come from PTuning out in Virginia and they show impressive gains across the entire RPM range!

Here is the baseline dyno, done on a 2011 BMW 135i 6MT:


And here is the dyno done after installation of our full Street Performance exhaust system (mid-pipes + axle-back):


The results are +15.5whp and +20.7wtq across nearly the entire powerband!

Our slogan is "Track Tested, Dyno Proven" and we try to stay true to that by putting out products that perform taking into consideration everything from power to weight reduction. Our Street Performance exhaust system sheds 20 lbs. of weight over the stock exhaust system with improved looks, improved performance, and OEM quality fit & finish.







You can get your hands on our exhaust system at your favorite Berk Technology dealer!
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      09-21-2010, 05:00 PM   #2
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NICE!
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      09-21-2010, 05:11 PM   #3
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.... very! I'm very close to getting new exhaust. It's either Berk or Maddad. Hmmm.....
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      09-21-2010, 05:12 PM   #4
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I would love to hear how this exhaust sounds on the N55.
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      09-21-2010, 05:16 PM   #5
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Quote:
Originally Posted by rkdiddy View Post
I would love to hear how this exhaust sounds on the N55.
We couldn't really tell a difference in sound between the N54 and N55 with the same exhaust system. Here is a video of the EAS 135i N54 with this exhaust on it.

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      09-21-2010, 05:48 PM   #6
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damn now I don't know if I want this exhaust.
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      09-21-2010, 06:14 PM   #7
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How can you not know?

This exhaust is on my shopping list.

Question: what's the difference between the Berk midpipes and stock?
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Last edited by MarkR171; 09-21-2010 at 06:21 PM..
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      09-21-2010, 06:37 PM   #8
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Quote:
Originally Posted by MarkR171 View Post
Question: what's the difference between the Berk midpipes and stock?
The Berk Technology midpipes use larger diameter piping than stock, plus it removes the OEM rear resonator box and secondary catalytic converters and replaces them with straight through resonators. And they're shiny...
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      09-21-2010, 07:18 PM   #9
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Sorry, I meant the N55 stock midpipes which don't have cats. Are yours larger diameter than the N55 pipes as well?
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      09-21-2010, 07:55 PM   #10
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Quote:
Originally Posted by burger16b View Post
damn now I don't know if I want this exhaust.
I had full Berk system with Macht Schnell downpipes. It was incredible. Top notch fit & finish. You won't be disappointed.
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      09-21-2010, 08:46 PM   #11
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Quote:
Originally Posted by igom3 View Post
I had full Berk system with Macht Schnell downpipes. It was incredible. Top notch fit & finish. You won't be disappointed.
"Had"....why did you get rid of it?
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      09-22-2010, 06:32 AM   #12
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O.k., so OEM cat stays on? (N55)
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      09-22-2010, 06:57 AM   #13
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Have you tried it on a convertible yet? Will it hit the extra bracket in the back?
Thx
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      09-22-2010, 07:20 AM   #14
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Quote:
Originally Posted by SiN55 View Post
O.k., so OEM cat stays on? (N55)
Yes. Have to replace downpipe to get rid of the Cat. This system only replaces mid-pipes and back.
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      09-22-2010, 08:22 AM   #15
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Doesn't sound much different than the stock N55 almost seems quiter at low rpm, gains are nice though!
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      09-22-2010, 10:13 AM   #16
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The base N55 only dyno's 258whp? Why is that?
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      09-22-2010, 11:06 AM   #17
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Awesome gains guys! Can't wait to get some N55's in here to install it so we can hear it in person
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      09-22-2010, 11:15 AM   #18
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I am the owner of the N55 that was Dyno'd.

Quote:
Originally Posted by BSM 335I View Post
The base N55 only dyno's 258whp? Why is that?
To answer this, Ptunning uses what they call the "hear breaker dyno" it is possibly one of the lowest measuring dynos out there. its all in the dyno used.

Quote:
Originally Posted by jsublime View Post
Doesn't sound much different than the stock N55 almost seems quiter at low rpm, gains are nice though!
Absolutely not true! this thing sounds incredibly mean, and is noticeably louder. However, It added quite a bit of vibration to the ride at low RPM's but the sound and power is well worth it. I’ll try to upload some sound clips once I have the time
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      09-22-2010, 11:53 AM   #19
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Quote:
Originally Posted by CMSS2000 View Post
"Had"....why did you get rid of it?
Car is for sale. Went back to stock
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      09-22-2010, 02:32 PM   #20
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Quote:
Originally Posted by stevend218 View Post
I’ll try to upload some sound clips once I have the time
Look forward to it.
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      09-22-2010, 02:37 PM   #21
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BERK

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      09-22-2010, 07:36 PM   #22
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Quote:
Originally Posted by MarkR171 View Post
Sorry, I meant the N55 stock midpipes which don't have cats. Are yours larger diameter than the N55 pipes as well?

Larger diameter tubing, smooth mandrel bends, straighter flow path, fabricated merge collector, lighter weight, better than OEM materials, and don't forget shiny.
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