[WrxToBeamerGuy]

Going catted DP from VRSF, still worth it to install the 90 deg spacer while I'm down there anyway?

In a different post I posted I got a comment saying the secondary o2 sensor also affects the Air Fuel Ratio. Anyone running rich or lean because of this?

Anyone do this with a catted DP?

[F30MGM]

Originally Posted by WrxToBeamerGuy

Going catted DP from VRSF, still worth it to install the 90 deg spacer while I'm down there anyway?

In a different post I posted I got a comment saying the secondary o2 sensor also affects the Air Fuel Ratio. Anyone running rich or lean because of this?

Anyone do this with a catted DP?

Secondary is for emissions. It lets the car know if the cat is efficient

[WrxToBeamerGuy]

Originally Posted by F30MGM

Secondary is for emissions. It lets the car know if the cat is efficient

Check out this discussion. It's one of the reasons im questioning messing with the post cat secondary o2.

https://bmw.s p o o l s t r e e t.co...l-needed.4877/

remove the spaces that I added to get to the discussion....

[s55jesus]

Just got my VRSF catless downpipes installed yesterday from a shop but I'd like to give a big thanks to the OP for the o2 spacer trick. I've driven about 100 miles since then and no CEL.

[jackstrath]

I Have a decat fitted, standard system but its still not quite loud enough. I love the fact i can make the car louder in sports and quieter in comfort, im thinking rather than cut the mid pipes out and risk drone to fit the remus axle back as it seems to be the cheapest valved axle back about,any one got this combo and fancy posting a sound clip?

[nog0odd3ed@gmail.com]

Originally Posted by F30MGM

Secondary is for emissions. It lets the car know if the cat is efficient

Doesn't TX do emissions probe test? Or just ODB2? How do you get away with doing catless downpipe?

[Rangeball_81]

Appreciate the guide, I used it this weekend to install a CG catted downpipe. Thanks!!

Shout out to Mike at X-HP for all the advice on which one to buy.

[Stlnation]

Originally Posted by Solid67

IIRC HJS and GESI cats are made of metal and can withstand heat much better than a ceramic-based cat which is what's in the VSRF and most of the other brands.

If you intend on having aggressive burbles then you want to go catless or get an HJS or GESI cat. With ceramic-based cats, you will eventually blow them out. If you really don't care about burbles then go with a ceramic-based one.

Which companies use hjs or gesi cats? What do you mean by “blowing them out”?

[F30MGM]

Originally Posted by nog0odd3ed@gmail.com

Doesn't TX do emissions probe test? Or just ODB2? How do you get away with doing catless downpipe?

Obd2 so they don't test pipes like California. However this is off-road use only you know what I mean

[McBill]

Hopefully I'm not thread hijacking here: I'm planning out a mod path for my 340i this summer and a catless DP is on my list. If I get an OTS map will I still need the 2nd O2 elbow in order to avoid a CEL?

[F30MGM]

Originally Posted by McBill

Hopefully I'm not thread hijacking here: I'm planning out a mod path for my 340i this summer and a catless DP is on my list. If I get an OTS map will I still need the 2nd O2 elbow in order to avoid a CEL?

Actually I deleted cat code but it still comes back saying short circuit to ground aka not plugged in, instead of cat inefficiency so I think maybe yes. Going to put code back and report

[Gotobedbro]

Did you notice any rattle noise with the vrsf downpipes? I heard these downpipes don't come with the clip that uses 2 screws that are on the stock downpipe.

[Supr3me]

Originally Posted by Gotobedbro

Did you notice any rattle noise with the vrsf downpipes? I heard these downpipes don't come with the clip that uses 2 screws that are on the stock downpipe.

They do now. Any new VRSF DP will have the bracket.

[HaloF30]

Originally Posted by Gotobedbro

Did you notice any rattle noise with the vrsf downpipes? I heard these downpipes don't come with the clip that uses 2 screws that are on the stock downpipe.

i ordered a min ago and had it installed and it rattles but I’ve learned to live with it. I’m trying to see if I talk with vrsf to see if they’re willing to swap it out with the revised version because man it gets to me sometimes I got a nice car but sounds horrible in sport with that ridiculous rubbing

[Tiago@VRSF]

Originally Posted by HaloF30

i ordered a min ago and had it installed and it rattles but I’ve learned to live with it. I’m trying to see if I talk with vrsf to see if they’re willing to swap it out with the revised version because man it gets to me sometimes I got a nice car but sounds horrible in sport with that ridiculous rubbing

The rattle is from your wastegate, not the downpipe.

If you can post a video of the sound you're referencing along with a screen shot of your order number we'll be more than happy to assist you with the rattle you're experiencing.

[HaloF30]

Originally Posted by Tiago@VRSF

The rattle is from your wastegate, not the downpipe.

If you can post a video of the sound you're referencing along with a screen shot of your order number we'll be more than happy to assist you with the rattle you're experiencing.

This is one I made once i first had it installed to see if I could fix it and there was no revised dp but now there is .. it’s not that the pipe itself has an issue it just rubs up against the metal side wall of The car because it doesn’t have that small support bracket.

https://streamable.com/ezcq8

[kern417]

Originally Posted by HaloF30

This is one I made once i first had it installed to see if I could fix it and there was no revised dp but now there is .. it’s not that the pipe itself has an issue it just rubs up against the metal side wall of The car because it doesn’t have that small support bracket.

https://streamable.com/ezcq8

If it's rubbing then the downpipe wasn't aligned properly. Loosen the clamps and rotate it. The bracket doesn't prevent it from rattling.

[HaloF30]

Originally Posted by kern417

If it's rubbing then the downpipe wasn't aligned properly. Loosen the clamps and rotate it. The bracket doesn't prevent it from rattling.

i took it to get installed and even the guy told me that he tried moving it around to get it not to rub but regardless it rubbed and said because it being xdrive there’s more coverage or something under so it rubs. so I just left it as is

[HaloF30]

Originally Posted by Tiago@VRSF

This.

HaloF30, please post a screen shot of your order confirmation so we can verify ownership of the product.

tiago would you like me to send it as a pm?

[HaloF30]

Originally Posted by Tiago@VRSF

Please e-mail us a copy of your invoice so we can trace your order and we'll be more than happy to assist.

sent! Thank you Tiago.

[yokata]

Originally Posted by HaloF30

i took it to get installed and even the guy told me that he tried moving it around to get it not to rub but regardless it rubbed and said because it being xdrive there’s more coverage or something under so it rubs. so I just left it as is

I had the same issue with my xdrive ,the guys cut it and re arranged it, but finally it worked out...

[HaloF30]

Originally Posted by yokata

I had the same issue with my xdrive ,the guys cut it and re arranged it, but finally it worked out...

Lmao bro what?! but fr what did they cut?