[PLife]

Installed the PSI literally 10 minutes after it arrived.
Really nice craftsmanship, everything lined up well. I cut at the middle dimple, like PSI told me to (I called them). I used jack stands to do the install, and I dont know what they put in TexasEd 's steaks because I sore AF today and it took me 2 hours because I was crawling around like a worm LOL



Moment of truth. M1 (sport plus mode), cold start. Holy hell. M performance cold start sounds like 2 metal goats fucking (keep reading). This has nothing to do with the PSI mid pipe, the emissions sequence from BMW is super aggressive with valves ass flapping in the wind, raised revs, and super rich mixture... its just crazy like that. Also the s58 straight 6 isn't the most harmonic engine, although I like it better than the F80 one. Switched to comfort mode for the duration of the cold start, all is well. Even tried it with the valves off (with the button). Ok I can live with this even at 5am on cold start. No problem. Wife doesnt even wake up.

Off to driving....
I can hear the engine!!!! Stock was like a hair dryer all I heard was speaker noise. Let's listen for drone. 2nd, 3rd, 4th... 1500-4000 rpm up and down with the windows up looking for it. light load, medium load, heavier throttle.... nothing. Zero drone. ZERO POINT ZERO. This is in all modes. Well done lads, the stock muffler is doing its job.

Driving around in normal rpm range this is very civilized with linear volume increase with imperceptible valve transition. Unlike porsche vacuum style valves where its zero to fucking hero at 4k rpm. This is very nice and refined. With stock airboxes and bmc filters the car sounds bad ass. Like mean and bad ass, very deep tone. At redline the car sounds like it wants to eat everything on the road but its not too loud. Hit the exaust off button and its stealth mode like James Bond. I had to do this a few times when my radar detector went off and I spotted cops... they were looking to see who was making all that noise... SOIIIIIKE, exhaust off bitches...

Intakes. I slapped the BMC cone intakes back on the car (I had uninstalled them due to concern it would be too loud). Nope. Its perfect. Actually the combination of the intakes and mid pipes makes the car drive super sharp and snappy as well. And I think the mid-pipes make power. I can now pull the same times on pump gas that I was pulling on E20 mixture and now with less boost. But I will gladly take the sound over more performance gain on the car because its more important to me.

In summary I am picky as hell with exhausts. For a daily driver PSI nailed it. You can actually probably put downpipes on the car and it wouldnt be too crazy with the stock muffler.

When the car is warmed up the sport plus start (not cold start) is phenomenal, and the revs are amazing. I still need to film fly bys etc. Will post on instagram. See this clip where I joined cicadas in song last night after the first drive (this is with stock airboxes and PSI mid pipes). I will update this thread as time goes by..

[PLife]

@Sean@psi

[beachBmmr]

Awesome.

Subbed to your instagram.
Post the intake noise!

[FISH22]

Killer write up, thanks!

[TexasEd]

I'm glad you like the midpipes. I had no problem with the install but unlike yourself I backed my car up on my ramps which raised the rear of the car nicely. I then used a low profile jack and jackstands. Were you able to reinstall the aluminum metal skid plate? I left mine off as there is no room to reinstall the plate with the new midpipes. Not a big deal anyway.

The weight savings is quite significant and I can tell an improved throttle response and acceleration. Sound is great!

Overall a really nice addition to the car in both weight savings, increased hp, and sound.

[Soylent]

Do you have any space between the cross brace and the X-pipe? Or are they in contact.

[sleepy75]

Originally Posted by TexasEd

I left mine off as there is no room to reinstall the plate with the new midpipes. Not a big deal anyway.

I find this concerning. Hope their aren’t widespread fitment issues.

[PLife]

Originally Posted by TexasEd

I'm glad you like the midpipes. I had no problem with the install but unlike yourself I backed my car up on my ramps which raised the rear of the car nicely. I then used a low profile jack and jackstands. Were you able to reinstall the aluminum metal skid plate? I left mine off as there is no room to reinstall the plate with the new midpipes. Not a big deal anyway.

The weight savings is quite significant and I can tell an improved throttle response and acceleration. Sound is great!

Overall a really nice addition to the car in both weight savings, increased hp, and sound.

Mine fit on install because i pushed the pipes upward with my body as i was tightening the clamps. However it was touching the plate at one side and im anal. So I added 2 stacked 5/8” stainless washers between the plate and the frame (around 4mm extra clearance). Had to make a home depot run the next day. Now it doesnt touch at all.

[PLife]

Originally Posted by Soylent

Do you have any space between the cross brace and the X-pipe? Or are they in contact.

Stacked stainless 5/8 washers all around at the 6 bolts holding the plate

[barryc365]

Nice one!

Can't wait to install mine (Valvetronic). I was torn between PSI, Supersprint and Valvetronic, can't imagine anyone will Be dissatisfied with any of them. They should all be a nice upgrade over stock

[V-Eight]

I'll go for the supersprint midpipe. I'm quite close to their headquarter here in Italy (120kms far) so i'll take directly my car there to install something in order to let me (and to the pedestrians as well) listen to the inline 6.

[mike@x-ph.com]

Thank you for sharing and congrats

[Chad11491]

Sounds great. I'm between this and the Valvetronic, and I like how this one seems a bit lower pitched. My only concern is it seems every person who's posted they have this midpipe looks to have clearance issues and that's a big bummer. I don't really want to space the brace off with washers.

[PLife]

Originally Posted by Chad11491

Sounds great. I'm between this and the Valvetronic, and I like how this one seems a bit lower pitched. My only concern is it seems every person who has it has clearance issues and that's a big bummer. I don't really want to space the brace off with washers.

If u use big stainless ones its not a big deal. The x pipe makes power if u have a tune

[m20e3087]

Originally Posted by barryc365

Nice one!

Can't wait to install mine (Valvetronic). I was torn between PSI, Supersprint and Valvetronic, can't imagine anyone will Be dissatisfied with any of them. They should all be a nice upgrade over stock

PSI sounds really good, I have personally seen and heard on both of PSI's shop cars.

[TexasEd]

Originally Posted by PLife

Mine fit on install because i pushed the pipes upward with my body as i was tightening the clamps. However it was touching the plate at one side and im anal. So I added 2 stacked 5/8” stainless washers between the plate and the frame (around 4mm extra clearance). Had to make a home depot run the next day. Now it doesnt touch at all.

That's a good idea and I will do that when I install the midpipes on my new 2022 when I receive it. I previously mentioned that I sold my 2021 (hated the sport seats) but removed the PSI midpipes before selling it. I like them that much.

[PLife]

Originally Posted by TexasEd

That's a good idea and I will do that when I install the midpipes on my new 2022 when I receive it. I previously mentioned that I sold my 2021 (hated the sport seats) but removed the PSI midpipes before selling it. I like them that much.

One of the keys for me was tightening the hanger mount bolts all the way to get it as high as possible. Then i just put some upward pressure on the x as i was tightening the clamps. I have no concern for the washer spacers 1) theyre stainless and 2) theyre 1.75 inches wide each so thats plenty of surface for force transfer from the plate

[TexasEd]

Originally Posted by PLife

One of the keys for me was tightening the hanger mount bolts all the way to get it as high as possible. Then i just put some upward pressure on the x as i was tightening the clamps. I have no concern for the washer spacers 1) theyre stainless and 2) theyre 1.75 inches wide each so thats plenty of surface for force transfer from the plate

Yeah, I simply tightened the clamps without putting upward pressure. I do wonder if the pipes, when touching the brace, and using spacers, will create vibration or noise thru the pipe touching the brace? I'm wondering if a rubber washer might be better?

[Soylent]

Originally Posted by PLife

Stacked stainless 5/8 washers all around at the 6 bolts holding the plate

Duh. What a simple fix. I'll try that this weekend. Thanks!

So.....PSI, that's 3 pipes here that haven't cleared the cross brace. Might want to angle the pipes so that the center of the "X" is higher. Not a huge issue but fine tuning you can do on your end. @sean@psi

[Soylent]

Originally Posted by TexasEd

Yeah, I simply tightened the clamps without putting upward pressure. I do wonder if the pipes, when touching the brace, and using spacers, will create vibration or noise thru the pipe touching the brace? I'm wondering if a rubber washer might be better?

Lifting up forcefully and tightening the clamps didn’t work for me. Yes, for me the touching does create a harmonic vibration at off-idle or low rpm. I like your idea of rubber washer or a rubber washer between 2 stainless depending on the clearance height

[PLife]

Originally Posted by Soylent

Lifting up forcefully and tightening the clamps didn’t work for me. Yes, for me the touching does create a harmonic vibration at off-idle or low rpm. I like your idea of rubber washer or a rubber washer between 2 stainless depending on the clearance height

I put 2 stacked 5/8” stainless steel washers (the hole is 5/8) for each bolt. The plate is for anti roll i didnt want it to flex

[Soylent]

Originally Posted by PLife

I put 2 stacked 5/8” stainless steel washers (the hole is 5/8) for each bolt. The plate is for anti roll i didnt want it to flex

Right. I thought about that. Rubber would defeat the purpose. Thanks for mentioning the exact hole size. It would bug me if the washers didn't line up exactly with each other, but that's just me