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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > 3000 miles, VRSF catted DP, ER catless DP, JB4, and recently BM3
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      10-21-2019, 02:19 AM   #1
NimbusGarage
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3000 miles, VRSF catted DP, ER catless DP, JB4, and recently BM3

Hi all. Just logging my experience with these mods on a 2016 340i, hopefully someone will it helpful information. Iíll list in the order I got these products. No products were dynoíd.

JB4 with BT connection

Installation - itís the easiest mod for that much gain, thereís 3 connections 2 under the hood and 1 in the cabin.

User experience
The good
- the BT interface is easy to navigate
- map switching is on the fly
- meters are nice to look at
- the gains are real
- being able to read and delete codes
I never mess with it too much and I settle with map 1

The not so good
- power delivery is not as smooth as Iíd like it to be
- some times at WOT it hesitates at pass 5k rpm
- always get the code ď102001 Air mass, plausibility -- Tuner code, ignoreĒ after I installed the AFe intake
- throws codes more than Iíd like


AFe Magnum Force intake

Installation - easy, I donít know what to say about it

User experience
The good
- sounds better
- looks OEM under the hood
- itís a good addition to the JB4

Thereís nothing I donít like about.
11/05/19 update - I was at Sonoma Raceway for a HPDE day couple weeks. Looks like the the intake box warped on around the edges due to the heat from the track runs.




VRSF Catted downpipe
10/21/19 Update - the vendor forwarded my concerns to VRSF and they promptly got back to me and offered to replace this my unit with their revised version once itís release. A+ for customer service, itís good to know VRSF listens to the end users and revise their products! Thatís a business I can support.

Installation - could be a lot easier with brackets, couldnít get mine to line up correctly

User experience
The good
- sounds nice
- noticeable gains
- VRSF customer service

The not good
- installation was not a good experience, maybe because I got a bad unit but I couldnít get the entire exhaust system aligned
- slight exhaust drone
- no mounting bracket

Evolution Racewerks catless downpipe - bought this to replace the VRSF downpipe

Installation - Iíd pay more just for the brackets, install was easy

User experience
The good
- noticeable gains
- cold start is loud
- gets the exhaust note to my liking
- no drone

The bad
- the fumes!! I canít drive with my windows down any more, come on people stop using catless downpipes, Iím sure weíre killing babies. I reinstalled OEM downpipe when I replaced the JB4 with the BM3


Bootmod3 OTS map 1, would had gotten this first if I didnít have the JB4 from my previous 330i wagon

Installation - easy but could get confusing for the computer challenged, spent the extra money to get a battery charger for smooth install

User experience
The good
- smooth power delivery
- calibrates Sport Mode meters but I donít know how accurate it is as I hit 440hp according to it lol
- has custom map options at extras cost
- seem to update OTS maps frequently

Only have under 100 miles experience, will update.

Iím debating on trying another catted downpipe but canít find any BM3 dynos with a catted DP.

Last edited by NimbusGarage; 11-09-2019 at 12:58 AM.. Reason: Update
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      10-21-2019, 03:42 AM   #2
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2011 BMW 135i  [5.00]
This is my thread which contains dyno results with a Catted DP.
https://f30.bimmerpost.com/forums/sh....php?t=1631003

I'm happy with the BCS DP.
100 cell and minimal smell only when first started.
Can't tell from the photo but it has a bracket and fitment was good.





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      10-21-2019, 12:18 PM   #3
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Thank you for sharing OP
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      10-21-2019, 01:08 PM   #4
NimbusGarage
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Quote:
Originally Posted by Nugget View Post
This is my thread which contains dyno results with a Catted DP.
https://f30.bimmerpost.com/forums/sh....php?t=1631003

I'm happy with the BCS DP.
100 cell and minimal smell only when first started.
Can't tell from the photo but it has a bracket and fitment was good.





Thanks for your link, I think your results confirm that adding a downpipe to a flash tune only offer minimal gains, you only gained 10hp BUT Iím sure the throttle response is a lot better which Iíd pay for but not at over $900.

Sup mike@xph, wanna give me a super hook up on the AFe catted downpipe?
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