[misguided_will]

What would happen if you install but don't have a flash done? Any issue?

[kern417]

Originally Posted by misguided_will

What would happen if you install but don't have a flash done? Any issue?

no issues with driveability. you may get a check engine light for emissions.

[tjbierman]

Thank you OP for this thread.

Does anyone know the torque spec for the V-band bolt? DP to Turbo connection.

I installed the VRSF catless downpipe, and for the moment I've just used the gutentight philosophy.

Thanks

Todd

[Di_tech]

Hello friends. I'm from Ukraine ) my F30 340i after installing the VRSF downpipe by order of start (cold / hot) keeps the engine rpm 1100 for about 10 seconds. this is normal?

[Tiago@VRSF]

Originally Posted by Di_tech

Hello friends. I'm from Ukraine ) my F30 340i after installing the VRSF downpipe by order of start (cold / hot) keeps the engine rpm 1100 for about 10 seconds. this is normal?

That's the standard cold start procedure for these cars

[mike@x-ph.com]

Originally Posted by Di_tech

Hello friends. I'm from Ukraine ) my F30 340i after installing the VRSF downpipe by order of start (cold / hot) keeps the engine rpm 1100 for about 10 seconds. this is normal?

Yes this is normal

[Di_tech]

Originally Posted by Tiago@VRSF

That's the standard cold start procedure for these cars

yes, for a cold start this is normal. but hot start is also high rpm every time🤷*♂️

[Antec800]

Originally Posted by somedood

First I want to say thanks for this post. It has been a really useful guide for my DP install. I wanted to clarify a couple of things for those that may have some quesitons or ran into some of the same problems as me and a couple of others

Like BMags-- my V Band Clamp was not coming off. The nut on the other side of the bolt was stuck spinning with the bolt and got a bit rounded off so that it was able to spin in the clamp. To get this off I had to cut the bolt in the middle of the housing. I used a dremel with a diamond cutting wheel that I already had from harbor freight. I had to reach in from the top but there was no visibility on what I was doing so I ended up using an old cellphone camera on portrait mode underneath the turbo so I could see what I was cutting. It took a couple of hours to get it off, but went fast once I used the camera to see what i was doing. The bolt is a metic M8 with a 1.25 thread pitch. This should give you the 13mm head that you need for the V Band Clamp. The longest bolt that I could find was a 70mm shank, but it was just long enough to put on without having to really squeeze the clamp together. You'll want to use a higher grade bolt for this since it will get very hot, like a 10.9 grade bolt

Secondly when I removed the DP I pulled it out from the bottom which required a lot of wiggling. When I put the new DP in I put it in through the top and it was much easier.

To remove the O2 sensors you can also use an O2 wrench that you can rent from Oreily / Autozone. Mine came out easy so an open ended wrench would have worked ok, but if you're renting tools anyway might as well get those to make it easier.

The pipe expander made fitting the midpipe end really easy!

Pmed for the vband bolt info

[hokiedood]

Does anyone know the cell rating of the stock downpipe catalytic converter?

[FastSleeper]

Originally Posted by hokiedood

Does anyone know the cell rating of the stock downpipe catalytic converter?

My understanding is that its a dual monolith setup with the 1st monolith being 600 cell and the 2nd being 400 cell.

[BudgetBimmer]

Originally Posted by tjbierman

Thank you OP for this thread.

Does anyone know the torque spec for the V-band bolt? DP to Turbo connection.

I installed the VRSF catless downpipe, and for the moment I've just used the gutentight philosophy.

Thanks

Todd

I was never able to find an absolute answer myself. 100+ install guides and no torque spec other than making sure it is tight... But I broke one already, on my second....smh.

[steveindabmer]

Ive seen other car v-bands torque to 75 inch-lbs. but id also like to know for sure. What is the part #? Arent the torque specs on the band?

[AMG KLR]

I installed mine last week. Mechanic said no fitment issues. Call me crazy but I love the smell it gives off. Only noticeable with windows down, and when they are, its when you are at a light or stopped

[kern417]

Originally Posted by BudgetBimmer

I was never able to find an absolute answer myself. 100+ install guides and no torque spec other than making sure it is tight... But I broke one already, on my second....smh.

Originally Posted by steveindabmer

Ive seen other car v-bands torque to 75 inch-lbs. but id also like to know for sure. What is the part #? Arent the torque specs on the band?

19nm

[demosey]

Originally Posted by F30MGM

Yessir that's the same one I purchased

Sorry to bring up an old post. Do you have any other links for this O2 sensor since these old amazon links no longer work?

TY in advance!

[F30MGM]

Originally Posted by demosey

Sorry to bring up an old post. Do you have any other links for this O2 sensor since these old amazon links no longer work?

TY in advance!

Try fabspeed ones

[khanmohammed]

Originally Posted by F30MGM

Try fabspeed ones

Once I get that O2 sensor extension on will the OBDII at emissions show as Ready? Because I went today for emissions and failed because the Catalyst Heater and O2 Sensor showed up as Not ready on my VRSF Catted Dp.

[khanmohammed]

Originally Posted by F30MGM

Hi fellow b58 ppls. Im pretty sure most of yall dont want to spend 400$ at a shop to install the your brand new downpipes so Im making a DIY for you all, It took me 3 hours or so to put it in because ive never done a downpipe in my life before, but I will show you a trick later that will save you a LOT of time. I went through the headache but now I will save you time ;D

Needed tools:
1x Ratchet
1x 14mm
1x 13mm
1x Pipe expanding tool 3"
22mm Wrench
1x Anti Seize Paste
1x 8mm socket
1x pick tool




Step 1 Put car on Jack Stands
Step 2remove airbox ofc


Step 3 Remove Under tray cover



STep 4 Remove Oxygen Sensor Wires. This one is a little tricky, unplugging them is easy, just twist the locking part press down and pull out but to get the o2 sensor wire off the plastic wire box cover thingy use a 90 degree pick tool and press the locking tab down and wiggle it out

]

Step 5 Unbolt DP to midpipe (IIRC it was a 13mm)


STep 6 unbolt downpipe to turbo(Bolt is under the turbo using a V-Clamp Feel for it when the engine is cool to touch(IIRC its a 13mm socket use a deep socket)



Step 7 With the DP and everything disconnected there is 2 nuts holding the DP to the car(Sorry i forgot to take picture, but just look down and reach for the two 14mm nuts and loosen them, at this point your DP is probably stuck to your midpipe still so all you have to do is wiggle the darn thing out

Step 8 Once youve gotten the DP off the car remove the two pre cat and post cat O2 Sensors with a 22mm wrench


Step 9 Stick a small amount of anti seize paste on the threads so its not a PItA to get off later down the road if you have to.


Step 10
****** NO CEL TRICK*******
Errr so for you "Track and Offroad only/Not legal for street" people errr all you have to do is buy a 90 degree o2 sensor extension and place it in this orientation which can be found here:

https://www.amazon.com/Degree-Angled.../dp/B00B1U6I54

*********NOTE THIS IS FOR OFF ROAD USE ONLY NOT LEGAL FOR STREET USAGE*********: lol:

OH and yes you will still pass inspection if its OBD2 only





Step 11 *********MAJOR KEY This single handed took me two hours of anguish because i did not use the pipe expansion tool. the down pipe would not fit nicely and now my neck hurts like crap because of this

********
With the Pipe expanding tool make the inlet on the midpipe bigger like this. You can rent one of these @ autozone or oreilly for FREE


STep 12
Start putting DP back where old one was


Step 13 Line up the DP to turbo and put the v clamp back on and tighten the clamp on the midpipe as well as bolting the midpipe nut back on to hold it in place(I forgot to mention removing that earlier but im pretty sure that is self explanatory.

Step 14 Plug in O2 Sensors

Step 15 Put undertray cover back on

Step 16 Close hood jack the car down GO TAKE A SHOWER because i know at this point you probably have black all over yourself for whatever reason. And we dont want you dirtying the inside of your nice new BMW now would we?

Step 17 Go do some 0-60 pulls and let me know how it goes

Sound clip per request:

Hey can I add the 90 degree extension if my downpipe is already installed? Got the VRSF catted

[teelos]

Anyone have a link for o2 spacers?

[B58 _gran_coupe_]

Great guide! Helped a lot!

This is my 2018 with MAD catless downpipe. Installed last weekend.

OEM exhaust other than downpipe.

MHD stage 2 is 91 octane. Burbles aggressive, duration 1 second.

[Info@mad-us.com]

Originally Posted by B58 _gran_coupe_

Great guide! Helped a lot!

This is my 2018 with MAD catless downpipe. Installed last weekend.

OEM exhaust other than downpipe.

MHD stage 2 is 91 octane. Burbles aggressive, duration 1 second.

Sounds great !

[B58 _gran_coupe_]

Originally Posted by Info@mad-us.com

Sounds great !

Thanks! I added a stainless pipe today and cut out the long resinator but kept the square one.