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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Extreme Power House | New Product VRSF STAINLESS STEEL MUFFLER DELETE



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      10-08-2018, 02:09 PM   #1
mike@x-ph.com
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Talking Extreme Power House | New Product VRSF STAINLESS STEEL MUFFLER DELETE


VRSF Stainless Steel Muffler Delete
For your 2007 - 2013 BMW 335i, 335xi and 335is with the N54 & N55 Engine

We are proud to introduce our VRSF Stainless Steel Race Muffler Delete for the E90/E91/E92/E93 BMW 335i/xi/is. This muffler delete is one of the most cost effective exhaust modifications available for your N54 & N55! By eliminating the incredibly restrictive OEM muffler, back pressure is reduced significantly which results in faster spool, an increase in power & a more aggressive exhaust note.

This product was designed and engineered for to fit on both the N54 & N54 version of the 335i and 335is in both RWD & AWD configurations. The difference in both power and sound are be noticeable the moment it is installed! Please note that cutting of the factory exhaust is required and that we include everything necessary for installation including installation hardware. These are available in multiple 90mm slip on muffler tip configurations displayed below. Please note that these tips do not require install hardware.

Features:
  • Hand made from mandrel bent, tig welded 2.5" 304 grade stainless steel.
  • Brushed finish with the option of 90mm Bright Polished, Chrome Black or Titanium Tip finish.
  • Smooth radius bends to decrease turbulence and increase flow.
  • Quicker spool and improved exhaust note.
  • Fits RHD and LHD models with no modification neccessary.
  • VRSF Lifetime Warranty against defects and fitment.

This item fits the following BMWs:
  • 2007 - 2013 E90/E91/E92/E93 BMW 335i, 335xi, 335is N54 & N55

Note: Fits both Left Hand Drive & Right Hand Drive Models

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      10-09-2018, 08:16 AM   #2
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Quote:
Originally Posted by mike@x-ph.com View Post
incredibly restrictive OEM muffler
Got any data to back that up? Before and after Dyno runs? Didn't Payam make 800+ through the stock exhaust?

Also can you define 'improved exhaust note'. This has to drone like crazy and be pretty raspy. Do you have any videos of it?

Not trying to be negative but I'm just skeptical that it's going to do anything productive beyond weight reduction.
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      10-09-2018, 11:16 AM   #3
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Quote:
Originally Posted by Kevin39 View Post
Got any data to back that up? Before and after Dyno runs? Didn't Payam make 800+ through the stock exhaust?

Also can you define 'improved exhaust note'. This has to drone like crazy and be pretty raspy. Do you have any videos of it?

Not trying to be negative but I'm just skeptical that it's going to do anything productive beyond weight reduction.
Any exhaust sound is subjective, the VRSF exhaust will sound like other muffler delete. tens of videos of muffler delete are found online.

As for the first part, we do not have any data because we did not make these claims.
The description was copied from VRSF's website directly.
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      10-09-2018, 12:40 PM   #4
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Thanks Mike. I appreciate the follow up.
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      10-09-2018, 06:12 PM   #5
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This is the first time I heard the n55 oem muffler being restrictive.
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      10-10-2018, 02:26 AM   #6
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We've seen gains of up to 25whp @ 700whp when switching from the OEM exhaust to our 3.5" catback. This also shaves over 20lbs of weight
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      10-10-2018, 09:20 AM   #7
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Quote:
Originally Posted by Tiago@VRSF View Post
We've seen gains of up to 25whp @700whp when switching from the OEM exhaust to our 3.5" catback. This also shaves over 20lbs of weight
You have a 700whp N55?
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      10-10-2018, 10:20 AM   #8
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Quote:
Originally Posted by weehe126 View Post
You have a 700whp N55?
I apologize for the confusion, this was in reference to the overall catback design which is very similar to the N54.
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      10-10-2018, 12:06 PM   #9
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Are you guys planning on posting a video of the sound? Would especially be interested in how it sounds with a VRSF catless DP installed already
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      10-10-2018, 12:37 PM   #10
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Quote:
Originally Posted by Tiago@VRSF View Post
I apologize for the confusion, this was in reference to the overall catback design which is very similar to the N54.
That's what I figured. I would say any performance gain claims aren't really valid unless you have the dyno data to back it up. Although cat-back is the same N54/N55, single turbo/dp vs twin is drastically different on how the exhaust actually goes into the cat-back section. For all we know a catless dp on N55 could still be more restrictive than the stock exhaust, resulting in no gains from this.
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      10-10-2018, 01:23 PM   #11
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The gains aren't necessarily the muffler delete, yes they're a restriction but it's from the 3.5-inch piping which allows the turbos to breathe much more at higher boost. A few n55 guys have upgraded to a 3.5in turbo back and seen gains from that. Newguy123 as an example with PS2.
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      10-10-2018, 01:36 PM   #12
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Quote:
Originally Posted by weehe126 View Post
That's what I figured. I would say any performance gain claims aren't really valid unless you have the dyno data to back it up. Although cat-back is the same N54/N55, single turbo/dp vs twin is drastically different on how the exhaust actually goes into the cat-back section. For all we know a catless dp on N55 could still be more restrictive than the stock exhaust, resulting in no gains from this.
This mod is more for sound than performance. If you're looking for performance, take a look at our catback. It's a single 3.5" pipe with the split reserved for the muffler. We also have a race version with no muffler launching in a few weeks. The street exhaust shaves about 45lbs of weight and the race version is closer to 60lbs
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      10-10-2018, 02:01 PM   #13
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Newguy123 has a 135i I believe. Those have very restrictive cat-back exhausts. 335i would really only be for sound and weight saving.
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      10-10-2018, 02:03 PM   #14
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Quote:
Originally Posted by weehe126 View Post
Newguy123 has a 135i I believe. Those have very restrictive cat-back exhausts. 335i would really only be for sound and weight saving.
We have a catback as well as a midpipe replacement option ready to launch shortly as well for the E82/E88
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      10-11-2018, 04:53 AM   #15
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Having seen the inside of my 335i mufflers when doing the PE exhaust mod, I don't see any restriction. It's literally a perforated pipe inside going straight through the muffler chamber, how would that be restrictive?
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      10-11-2018, 07:43 AM   #16
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Quote:
Originally Posted by Tiago@VRSF View Post
We have a catback as well as a midpipe replacement option ready to launch shortly as well for the E82/E88
Nice! 3.5?
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      10-11-2018, 09:03 AM   #17
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Quote:
Originally Posted by Tiago@VRSF View Post
We have a catback as well as a midpipe replacement option ready to launch shortly as well for the E82/E88
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      10-12-2018, 10:55 PM   #18
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"Incredibly restrictive factory exhaust" lol
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      10-14-2018, 05:17 PM   #19
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Quote:
Originally Posted by ckanderson View Post
"Incredibly restrictive factory exhaust" lol
Sales pitch of the day
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