[JonEQuest]

Originally Posted by mike@x-ph.com

Our most popular by far is the VRSF

That was my other choice.

[mike@x-ph.com]

Originally Posted by JonEQuest

That was my other choice.

Congrats on getting new DP, looking forward for your feedback

[JonEQuest]

Originally Posted by mike@x-ph.com

Congrats on getting new DP, looking forward for your feedback

Should I reconnect all 4 oxygen sensors? I've been reading that most people leave the back 2 disconnected. I have not done any performance flashes on this car. BUT I know nothing about what the former owner did except for he did put a cold air intake on it. I'm just curious because once I install this I don't want to take it down again and possibly mess up the gaskets if I don't need to. I do have a data cable and have learned a little bit about how to use INPA.

[Emilime75]

I'd install them, you can always just disconnect them if you decide you don't want them active.

[JonEQuest]

Originally Posted by Emilime75

I'd install them, you can always just disconnect them if you decide you don't want them active.

Ah, that's true. I wonder if the back ones will read correctly without the front catalysts burning some of the fuel before it gets to the second ones?

[Jklad]

Definitely connect the rear o2s.

[JonEQuest]

Originally Posted by Jklad

Definitely connect the rear o2s.

OK, that was my first thought but then I read about people saying they're disconnecting the rear ones.

[JonEQuest]

Will I need to code anything after putting the downpipes on?

[Jeff@TopGearSolutions]

Originally Posted by JonEQuest

Should I reconnect all 4 oxygen sensors? I've been reading that most people leave the back 2 disconnected. I have not done any performance flashes on this car. BUT I know nothing about what the former owner did except for he did put a cold air intake on it. I'm just curious because once I install this I don't want to take it down again and possibly mess up the gaskets if I don't need to. I do have a data cable and have learned a little bit about how to use INPA.

All 4 should be connected, they all play a role in fuel trims.

Whoever said disconnect back 2 offered very poor advice.

If you don't have a tune that removes the check engine light, you will have one.

[JonEQuest]

Originally Posted by Jeff@TopGearSolutions

All 4 should be connected, they all play a role in fuel trims.

Whoever said disconnect back 2 offered very poor advice.

If you don't have a tune that removes the check engine light, you will have one.

Yeah, I plan to connect all 4.

[JonEQuest]

Originally Posted by thelightning

From what i can tell from the picture; Don't use those gaskets. They are very low quality and do not have metal ring. They can be blown out easily. Specially on the downpipes without flex piece.

I recommend you get a set of original BMW gaskets with the squish ring that look like this;

I am about to try and install three. I agree with using OEM BMW gaskets but I am going to just give it a go with the ones it came with so I don't have wait anymore. If I have to change them later it won't be a big deal.

[Emilime75]

Originally Posted by Jeff@TopGearSolutions

Whoever said disconnect back 2 offered very poor advice.

If this was aimed at me, I'd like to clarify that I did not suggest any be left unplugged. The question was if any should be left "uninstalled", to which I replied no, none should be left uninstalled...but, should the OP ever feel a need to not have any of the O2 sensors active, he can simply unplug them...for whatever reason he see fit.

[JonEQuest]

Originally Posted by JonEQuest

I am about to try and install three. I agree with using OEM BMW gaskets but I am going to just give it a go with the ones it came with so I don't have wait anymore. If I have to change them later it won't be a big deal.

I added some foil tape to both sides of the gaskets to beef them up.

[JonEQuest]

Originally Posted by JonEQuest

I added some foil tape to both sides of the gaskets to beef them up.

the MMP downpipes we're the only ones I've ever installed but they did fit well. I encountered what I've seen in many photos where 1 pipe is far away from the exhaust and the longer bolts really come in handy to pull it together. I also found that one bolt I've heard about that sits right against the downpipe. I actually grindes down the top of it a bit so that would be a couple of millimeters of clearance. Basically the end result is that these seem to fit pretty well. I have not driven the car because I'm trying to track down a noise that I was hoping was exhaust leak but maybe bearing or something.

[Jeef]

Looks like you shaved the motor mount bolt head?

Fitment is poor if that needs to be done. Thanks for sharing!

[JonEQuest]

Originally Posted by Jeef

Looks like you shaved the motor mount bolt head?

Fitment is poor if that needs to be done. Thanks for sharing!

I have read that there was one bolt that often hits the downpipes of most brands. That was the bolt for me. I will eventually just replace it with a standard type bolt that is lower profile. Some down pipes come with a bolt for this reason.

[Jeef]

Originally Posted by JonEQuest

I have read that there was one bolt that often hits the downpipes of most brands. That was the bolt for me. I will eventually just replace it with a standard type bolt that is lower profile. Some down pipes come with a bolt for this reason.

Yes but the downpipes that fit well don't require any extra modification or bolt

[JonEQuest]

Originally Posted by Jeef

Yes but the downpipes that fit well don't require any extra modification or bolt

I understand but this one fits pretty well and if I have to buy one bolt I can live with it. It has plenty of clearance away from everything else. This is the least of my worries at the moment because quieting the exhaust leak I had before as finally exposed the fact that there's definitely noise in the lower end of my engine.

[OTO335i]

Originally Posted by Faredo

Yes replace the gaskets under the V bands, they are cheap. As far as being a PITA, after a few goes this can be done very quickly. just takes a little practice.

I'm sorry if this is a dumb question but gaskets under the V-bands? Isn't the point of a V-band to not need a gasket as the V-band wraps around both joining pieces and holds them tightly together? I can't seem to find any V-band gaskets online, do you mean a whole new V-band?

[Jeef]

Originally Posted by OTO335i

I'm sorry if this is a dumb question but gaskets under the V-bands? Isn't the point of a V-band to not need a gasket as the V-band wraps around both joining pieces and holds them tightly together? I can't seem to find any V-band gaskets online, do you mean a whole new V-band?

It's a circle gasket that sits between the turbo and downpipe. You don't need a new one unless there are signs of leakage.

[JonEQuest]

One of mine was leaking big time so I replaced them both and went ahead and got downpipes at the same time since it is not a fun job. Now that my exhaust leak is cured I am sure that the noise I was worried about is a rod bearing.

My next project is to go ahead and drop the oil pan and see what is going on. I suspect a rod bearing and hopefully it is not at the point the journal is scarred too bad.

[Jeff@TopGearSolutions]

Originally Posted by Emilime75

If this was aimed at me, I'd like to clarify that I did not suggest any be left unplugged. The question was if any should be left "uninstalled", to which I replied no, none should be left uninstalled...but, should the OP ever feel a need to not have any of the O2 sensors active, he can simply unplug them...for whatever reason he see fit.

It was not for you, only the person I quoted