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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jun-23-2016, 03:57:27 PM   #1
Vox Populi
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Default Brey-Krause Race Seat Mounts - DIY and Review

Justifiably, there has been a ton of interest in the new Brey-Krause racing seat mounts that were recently released. I have been running these all year and, due to the interest, decided to make a comprehensive thread about the product, install and experience.

Some background...

I have used the Motion Motorsports mounting kit as well as the VAC mounting kit. Between those two options, here is how I'd rank them:

Weight: VAC > Motion
Price: Motion > VAC
Ease of installation: Motion > VAC
Purchasing experience: Motion = VAC
Innovation in design: Motion > VAC
[Perceived] Safety in design: Motion > VAC (note this is due to the slotted design on the VAC Side Mounts which have been compromised in an accident as a member here has already shared with the community).


All that said, I sold my Motion Mounts to a member here to try these BK ones. Honestly, beyond the weight of the Motion setup, I really don't have a bad thing to say about them. They are a really solid option.

For the purposes of this thread, I'm going to compare most directly to the VAC setup as that's what most here are familiar with (whether it be VAC or Macht Schnell, etc. - that multi-component setup is what folks are used to).


So let's start with the products themselves.

For the BK units, you only need the mounts and a sub bar. I purchased directly through Alex at Performance Eurowerks (amazing services as always). For the purpose of this thread, I'm going to be linking directly to the manufacturers websites.

BK parts:
Driver's Side Mount: http://www.bkauto.com/R_9250_Driver_...m_p/r-9250.htm
Passenger Side Mount: http://www.bkauto.com/R_9251_Passeng...m_p/r-9251.htm
Sub-Strap bar (works with both sides):http://www.bkauto.com/R_9259_Sub_Str...s_p/r-9259.htm

Total Weight per side: 8.4lbs
Total cost per side: $289.90


VAC/MS parts:
Race Seat Installation Kit (includes floor mounts and seat mounts): https://store.vacmotorsports.com/rac...e46-p1605.aspx
Sub Strap Bar: https://store.vacmotorsports.com/vac...ket-p2106.aspx
Lap belt bracket kit: https://store.vacmotorsports.com/vac...kit-p2303.aspx

Total Weight per side: 10.2lbs
Total cost per side: $374.85


Now onto the pictures/install.




Start with BK mounts - the packaging is awesome and the black powdercoating makes them look tough as hell (and almost oem-ish once installed):





Vaccuum floor because race-car





Begin assembly (For all of you who have installed seat mounts before, watch how easy this is!)

Step 1: attach seat to mounts





Step 2: attach OEM belt receptacle to mounts using (awesome) guide pin to align the holes.





(note that I'm not using the OEM bolt to attach the receptacle but you can. Also, the hole on the mount is threaded for the bolt so there is no need for the nut on the other end - I just use it to be extra [perhaps overly] cautious)




Step 3: Attach inboard lap belt. (so many awesome things in such a small area on the mounts!)

3a) via clip in point on the mount itself:





3b) or via bolt in using the same hole used for the OEM receptacle:






Step 4: Attach sub bar. There are two hole options on the seat mount to ensure the sub bar is in the appropriate spot relative to where the belt hole is on your seat. The bar itself is installed by loosening the lock nut, threading out the ends until they are at the appropriate length to fit between the mounts, then tightening locknut and securing with bolt from outside mount. Make sure you do your sub strap wraps before installing the bar.





You can see the bolt securing the sub bar in this picture:



Step 5: prepare the car for installation. BK includes these spacers which serve a few different purposes. The first is to ensure a certain stack height required for the bolts to work. Placing them below the mounts gets you off the carpet (obviously not needed if you don't have any carpet), and the spacers on top reinforce the slots.
Pretty awesome design!







Step 6: - Install seat in car. Very straight forward. Use same mounting points in the car with same hardware you used on the OEM seat (just make sure you include the spacers on top of the mounting points above the seat mount when installing). Also, make sure you've appropriately tightened the bolts mounting the seat to the mounts by now. The inboard ones are going to be fairly difficult to access once everything is in.




Step 7: Attach outboard lap belt. Again, you have the same options as with the inboard - clip in or bolt in.



Finished product:






I actually use a separate piece from BK for my outboard lap belts (not needed at all), but it allows me to get the belt totally out of the way when I'm driving the car on the street (read: to/from track)..







In summary:

Weight: BK > VAC/MS
Price: BK > VAC/MS
Ease of Installation: BK > VAC/MS
Purchasing Experience: PE = VAC (timely delivery of product; answered all questions, etc.)
Innovation in design: BK >>>>> VAC
[Perceived] Safety in design: BK > VAC (11ga type 304 stainless steel vs alu; appropriately shaped mounting holes)


In closing, I think these will (and SHOULD) become the absolute gold standard for race seat mounting in the E46. The combination of material choice, compact packaging, chassis and seat specific design and cost make these a no-brainer for me. Hopefully this thread is useful to others considering these for their cars. I'll do my best to answer any and all questions. Happy motoring!
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Old Thu, Jun-23-2016, 04:08:41 PM   #2
m3elmo
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

great review and pictures!!! going to order now. I like as little moving pieces as possible and this unit also seems like it would help mount as low as possible which is a plus. wish they made something for the 997 as well - they make other mounting options but nothing as one does all as this is.
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Old Thu, Jun-23-2016, 04:17:16 PM   #3
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

Great post Vox, glad these have worked out so well and they look like an awesome option for people. The attachments for the belts look super convenient. Do you think the seats are lower than with your old Motion set?
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Old Thu, Jun-23-2016, 04:31:47 PM   #4
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

Great post! Looks like a brilliant solution for those who do not need sliders.

I know BK is serious about safety so this is not BS.
Quote:
-The R-925X seat mount line has been tested and certified by an independent lab to handle the types of forces required by the National Highway Traffic Safety Admin. DOT and SAE J385 Rev.MAR 95, Motor Vehicle Seat Belt Anchorages-Performance Requirements.
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Old Thu, Jun-23-2016, 06:24:40 PM   #5
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

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Originally Posted by BlazenXLT View Post
Great post Vox, glad these have worked out so well and they look like an awesome option for people. The attachments for the belts look super convenient. Do you think the seats are lower than with your old Motion set?
thanks!

I'm about the same height as I was with other solutions. But I'm not a super tall guy (5'10") so Ive not had an especially difficult time fitting in the car. The larger issue for me was finding a properly fitting seat. I needed something with a narrower waist area but wider shoulder area. The ProFiXL did not fit me at all. These EvoII US seats feel like they were built for me.
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Old Thu, Jun-23-2016, 07:27:32 PM   #6
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

Quote:
Originally Posted by Vox Populi View Post
thanks!

I'm about the same height as I was with other solutions. But I'm not a super tall guy (5'10") so Ive not had an especially difficult time fitting in the car. The larger issue for me was finding a properly fitting seat. I needed something with a narrower waist area but wider shoulder area. The ProFiXL did not fit me at all. These EvoII US seats feel like they were built for me.
Nice. Seats were a big issue for me too, I think I sat in 8 or 9 options. I think I mentioned it when we met up, but I went with the EvoII US for the passenger side and the EvoII for me. I needed a narrow fit I higher harness holes. I should have the car back from the shop this Saturday, really excited
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Old Thu, Jun-23-2016, 07:30:51 PM   #7
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

Thank you for the kind words and putting up this review/DIY!

We'll be posting up our own thread in the near future. Track season and client cars are keeping all of our hands tied, haha.

We truly echo your thoughts on the experience with the brackets. As Malloy mentioned, Brey-Krause DOES NOT compromise by any means when it comes to safety hardware.

Thanks again for the support and opportunity to assist with the build. Now, can you please come visit us again. :P
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Old Thu, Jun-23-2016, 09:37:36 PM   #8
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

I will most likely be upgrading to these from my VAC set up. However, have to call out that total joke of the stock lap belt mount. You got to be kidding yourself if you think stretching your lap belt over the side of the seat is doing anything but compromising your safety. To and from the track, while inconvenient, I just use my harnesses. That lap belt receptacle needs to be mounted further back so you can thread the lap belt through the seat holes. Yes, it would still be a pain to buckle in, but at least it'll do something besides take up space and weight, and in my own opinion, compromise safety. Now, I could be wrong, so, I am happy to hear otherwise from someone with experience...just going by the pics here.
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Old Thu, Jun-23-2016, 09:45:22 PM   #9
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

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Originally Posted by Performance Eurowerks View Post
Thank you for the kind words and putting up this review/DIY!
Alex - this is danny - we talked on the phone this AM/PST. Was really waiting for photos of installation before pulling the trigger on these.

really hope they make a version for the 996/997.

the issue for some is they really want the sliders to work since the car is duel purpose for them, or for ingress. I personally feel sliders compromise safety and would rather not.
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Old Thu, Jun-23-2016, 10:41:53 PM   #10
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Default Re: Brey-Krause Race Seat Mounts - DIY and Review

Vox any problems with getting the seats center to the wheel? I always feel like the offset is there no matter what I do. Are these purposely built with an offset for the trans tunnel to make them line up ok?

Stellar review and format. This should be used as a template going forward for others LOL
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Discussing e46 M3 Tire Sizing Thread in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)