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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 > = = Vishnu N55 Catted Downpipe - Power Gains / O2 Extension Integrations = =



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      05-12-2011, 10:02 AM   #1
Huy@Vishnu
 
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Arrow = = Vishnu N55 Catted Downpipe - Power Gains / O2 Extension Integrations = =

Vishnu N55 Catted Downpipe






Hey Guys,

Vishnu will be testing our high flow catalytic converter downpipe for power and fitment sometime next week. We now have our new O2 location for easier installs and to determine the length needed for our integrated O2 spacers. The Vishnu Catted downpipe is from customer demand for performance without additions of a catless downpipe smell and sound. Some consumers may not like the added turbo spool sound, therefore this option will offer best of both worlds for them. A happy medium between stock and a catless downpipe.

Specifications:

- The Vishnu Catted Downpipe is COMPLETLEY made in the USA. Our components within the downpipe are all made of 304SS which includes V Flange, Converter Casing, Piping, Brackets and O2 bungs. Vishnu has integrated one of the highest flowing catalytic converter for performance and sound on the market. The catalytic converter offers a metal matrix with precious metals for longevity and too withstand high operating temperatures. Like our Vishnu Catless Downpipe, the 3.5 inch offers a precision CNC'd V Flange for the tightest seal and a single laser cut (dual exit) flange for rigidity and fitment. This catted downpipe will be in a mill finish to demonstrate our quality over other competitors and coated finishes. One of our newest additions to downpipes are the integrated O2 extensions to help with any possible Check engine lights ( CEL ) / Service Engine Lights ( SEL ).
We are currently having a Pre Order Special and may not last soon with the orders we have been getting.

Please email sales@vishnutuning.com for more details, or shoot robert@vishnu / Huy@Vishnu a PM and we can take care of any questions at this time.

Keep Posted and Have a great day.

Our Test Vehicle:

STOCK DYNO'D AN AVERAGE of 280 WHP and 284 WTQ

CATTED N55 DYNO AN AVERAGE of 288 WHP and 297 WTQ













Last edited by Huy@Vishnu; 06-02-2011 at 08:04 PM. Reason: Added Dyno Sheet
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      05-12-2011, 12:11 PM   #2
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Great looking design Huy keep up the good work.
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      05-12-2011, 12:47 PM   #3
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Nice, been hoping to see some catted pipes released . Might have to get in on the action!
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      05-12-2011, 01:09 PM   #4
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It's about damn time! Now that is something i will put on my car. When they go for sell? Ill drive and pick one up now!
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      05-12-2011, 01:23 PM   #5
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nice!
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      05-12-2011, 02:14 PM   #6
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Vishnu N55 Catted DP

The Catted Version DP will be available soon!!! We are still doing some preliminary testing before we release further info about the product. We currently working with an existing customer to swap out the catless for a catted version and do some dyno testing for actual results. We have done the testing ourself already. Next will be the emissions test. Being that CA has the highest emission standards in the US as long as we are within regulation standards then we will pull the trigger on production. We are getting great results and this should be a great piece. Please feel free to contact us for more details and info.

Robert@Vishnu
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      05-12-2011, 02:23 PM   #7
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yeah i would like to see a comparo of cat vs catless
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      05-12-2011, 02:47 PM   #8
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I'm interested as well..please keep us posted. Thanks! -WoW
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      05-12-2011, 02:53 PM   #9
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Next time you design a product try to use decent flanges.
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      05-12-2011, 03:20 PM   #10
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Quote:
Originally Posted by IancoleTX View Post
What on earth are you talking about?


Those look great, Team Vishnu! Well done.
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      05-12-2011, 03:32 PM   #11
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Quote:
Originally Posted by wren57 View Post


Those look great, Team Vishnu! Well done.
, Thanks... Keep posted guys, we have several catted ones that we prototyped to see the quality in the materials used INSIDE the metal matrix ( honey comb ) and this was the ONLY one that uses all 304SS casing at the same time offers one of the best flowing after market converters.
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      05-12-2011, 05:34 PM   #12
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N55 DP

Looks great!!! Can't wait to see the results and comparison versus the catless version. This DP looks really well made!!! Are you guys using a 100, 200, or 300 cell cat?? Reason I ask is because some has higher heat ratings. If I were to drive the car hard and really heat up the cat. Lower quality cell cat will literally burn out and be useless. I know you guys are going to use quality parts but i thought I would ask.

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      05-12-2011, 05:56 PM   #13
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yea... if the gains are similar - I'll SELL my 3.5 catless dp and pick this one up....... post the comparison pleazzzze
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      05-13-2011, 10:40 AM   #14
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Good Stuff!
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      05-14-2011, 02:27 PM   #15
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Would love the turbo spool sound, but the smell is putting me off for a catless dp... Some videos would be nice!!! Hopefully dyno will show performance improvement. Good Work!!!
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      05-15-2011, 07:49 PM   #16
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any dynos yet, or anything???
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      05-15-2011, 08:00 PM   #17
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Quote:
Originally Posted by madmanhiker View Post
yea... if the gains are similar - I'll SELL my 3.5 catless dp and pick this one up....... post the comparison pleazzzze
let me know if u sell it
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      05-15-2011, 08:17 PM   #18
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Quote:
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let me know if u sell it
i have one for you as well
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      05-18-2011, 12:16 PM   #19
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Quote:
Originally Posted by |2ed View Post
Would love the turbo spool sound, but the smell is putting me off for a catless dp... Some videos would be nice!!! Hopefully dyno will show performance improvement. Good Work!!!
So far, no check engine light for the first day... dyno numbers look really promising and the car drives with a little be more throttle response compared to the catless. Keep posted ....
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      05-18-2011, 01:05 PM   #20
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Quote:
Originally Posted by Huy@Vishnu View Post
So far, no check engine light for the first day... dyno numbers look really promising and the car drives with a little be more throttle response compared to the catless. Keep posted ....

Can not wait!
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      05-18-2011, 11:06 PM   #21
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Can not wait!
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      05-19-2011, 05:15 AM   #22
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