New budget-friendly front BBK! AAS Brembo Street Kit is live

[BleedsBlue]

Worth starting a new thread, since the 996 kit has been abandoned.

Angry Ass BMW is proud to announce that we are live with a new Street BBK: https://www.angryasssolutions.com/parts/stage-1-bbk

Using OEM BMW off-the-shelf calipers, rotors, and longer caliper bolts, we provide stainless steel caliper mounting spacers and thread lock: bolting up a modern, aluminum 4 piston Brembo and true 2-piece 340x30mm floating rotor is that easy!

These Brembo calipers offer advantages in construction, availability, and affordability compared to the increasingly rare E31 Brembo, and the weight is halved compared to the ATE 4 pistons calipers of the late-M5/850CSI. Just like these aforementioned caliper alternatives, our Brembos adjust bias slightly to the rear for a more performance-oriented setup.

Rotor-wise, the 340x30mm aluminum 2 piece disc is nearly the same size as the late-M5/850CSI rotor, but vastly more available to US buyers, and cheaper to boot. Compared to the heavy, 1-piece E31 324mm rotor, our modern rotor is a similar cost but wins the size and thermal expansion battles!

We expect we will beat any other online price source in pricing for these OEM components.

We are also ordering stainless steel brake lines that can be ordered, and have also just gone live with USA-made MSI stud conversion kits! https://www.angryasssolutions.com/pa...conversion-kit

What’s not to love?
Not all 17” wheels fit.

We have confirmed M Systems fit with barrel room to spare, without a spacer.
Common aftermarket race wheels, such as Apex brand wheels, will likely fit as they are clearanced specifically for BBKs.

Common OEM 17” wheels like the 2-piece Style 5 do not fit, due to lack of barrel clearance.

Additionally, our rotors do not have provision for E34 M5 hub lugs. We can offer a milling service for any M5 customers, to correctly bore out those holes in the rotor hat (additional fee and lead time required).

Post up or PM any questions! Potential discount details below...
We’ve sold our first few kits to happy customers. Let us know if we can answer any questions about kit specifics!

We are also offering a 20% discount on our Option 1 kit to the first buyer who will install this kit on any of the following chassis, which we believe share fitment with the E34:
- E24
- E28
- E32

We will fully support customers trying the kit on these chassis, in the event that tweaking is needed! Refunds and paid return shipping will be taken care of as needed, to mitigate risk on the customer end. Help us help you!

[UnrulyGrace]

Can’t love this enough.

[tantumaude]

I admire this greatly, and I'm very glad to see development for E34 junkies!

...but I can't help but wonder where the 'budget' part is.

ECS will sell you a complete E31 BBK for less than your complete kit in option 4, which for people like me is the reference point. E31s score big by fitting under style 5s for me as well.

I'd be curious to compare feel and braking between the two.

[BleedsBlue]

I admire this greatly, and I'm very glad to see development for E34 junkies!

...but I can't help but wonder where the 'budget' part is.

ECS will sell you a complete E31 BBK for less than your complete kit in option 4, which for people like me is the reference point. E31s score big by fitting under style 5s for me as well.

I'd be curious to compare feel and braking between the two.

This set-up on my car was essentially our option 1 ($55) and some lightly used calipers and rotors from Craigslist, sourced locally.

My all-in cost was $400 - Rotors, calipers, pads, and adapters.

I've not seen E31 Brembos, by themselves, sell for less than $600/pair recently, and that was sans rotors, and in poor shape to boot!

We offer the OEM parts new, at a cheaper price than ECS offers the same parts, just to make it easy for the customer. But we expect many will source their own hardware, and for the first two sales of this kit, that is exactly what happened. That's where the budget comes in

That said... our goal is never simply to be cheapest. Let's face it, on a lot of our products, we won't have competition. Our true BBK kit involves 6 piston AP Racing RadiCal calipers, bespoke rotor hats, etc, at near $4,000. At right around $1500, it is hard to find a 4 piston Brembo setup with true two-piece rotors. We mention the E31 Brembo option in our write-up because it's still a valid option, but as noted we pair a more modern caliper with a larger, more efficient rotor.

And hey, we appreciate the kind words from a fellow E34 nut!

[TGreene]

This set-up on my car was essentially our option 1 ($55) and some lightly used calipers and rotors from Craigslist, sourced locally.

My all-in cost was $400 - Rotors, calipers, pads, and adapters.

I've not seen E31 Brembos, by themselves, sell for less than $600/pair recently, and that was sans rotors, and in poor shape to boot!

We offer the OEM parts new, at a cheaper price than ECS offers the same parts, just to make it easy for the customer. But we expect many will source their own hardware, and for the first two sales of this kit, that is exactly what happened. That's where the budget comes in

That said... our goal is never simply to be cheapest. Let's face it, on a lot of our products, we won't have competition. Our true BBK kit involves 6 piston AP Racing RadiCal calipers, bespoke rotor hats, etc, at near $4,000. At right around $1500, it is hard to find a 4 piston Brembo setup with true two-piece rotors. We mention the E31 Brembo option in our write-up because it's still a valid option, but as noted we pair a more modern caliper with a larger, more efficient rotor.

And hey, we appreciate the kind words from a fellow E34 nut!

Very cool. On the hunt for some of those 335i calipers.

[Hofmeister]

so what about rear brake options with this? cause ive been very interested in a nice brake setup for ages.

[Fatandre]

Just ordered the kit.
We will se how this will work with the e31

[BleedsBlue]

Very cool. On the hunt for some of those 335i calipers.

Cool!

so what about rear brake options with this? cause ive been very interested in a nice brake setup for ages.

We are developing a rear brake upgrade. It will ape the late-M5/850CSI rear, of a 328mm rotor and sliding caliper (easy to retain the handbrake with this setup); but considering those parts are very hard to find, we’ll be providing a unique upgrade.

The rear upgrade is targeted more towards our 6 piston AP Racing race front setup, which overwhelms ABS and the front tires even with 245 Michelin Pilot Sport Cup 2s! Our street kit actually shifts some bias rearwards - of course a larger rear is still advantageous, but not as important.

Just ordered the kit.
We will se how this will work with the e31

Wooooooo! Your order will hit the post tomorrow.

[dannyzabolotny]

Sorry if I missed this somewhere, but where does one source the calipers needed for the kit? Seems like a pretty attractive option if the parts can be sourced cheaply. I was planning on doing a 540i brake conversion but this could be cool too.

Any chance you might port it over to the E39? There's a serious lack of budget BBK options in the E39 world.

[BleedsBlue]

Sorry if I missed this somewhere, but where does one source the calipers needed for the kit? Seems like a pretty attractive option if the parts can be sourced cheaply. I was planning on doing a 540i brake conversion but this could be cool too.

Any chance you might port it over to the E39? There's a serious lack of budget BBK options in the E39 world.

Hey Danny, you can source them used on your own, via Craigslist, eBay, etc; or, new via online or brick-and-mortar dealers, but at that point, we offer the calipers cheaper than any other supplier (at least that we've found).

The E39 has that troublesome, random, unique larger hub diameter! Come to think of it, you are right about the "budget" aspect; I see lots of E39 Ms with BBKs but they are usually your Brembo or Stoptech big-dollar items.

[XCRN]

Rockauto also sells the calipers rebuilt for about $250 each, that includes the core charge in them. I did the full M-Performance upgrade on mt old F30 for like $1000. Luckily I kept my old 335i calipers so I am set pretty good.

[BleedsBlue]

^Good info!

[XCRN]

Something that dawned on me as I was taking apart my F30 calipers that would benefit thoes pursuing this upgrade. The F30 places the calipers in the rear and the E34 places them in the front so you will need to swap LH and RH sides so the bleeder screw is on top in order to properly bleed the calipers.

[BleedsBlue]

That is a good clarification in case one is not familiar with typical 4-piston calipers, for sure. Nipples always up!

[93FIM5]

That is a good clarification in case one is not familiar with typical 4-piston calipers, for sure. Nipples always up!

Not sure if I can laugh. . .


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[BleedsBlue]

Ahem...

We can’t keep these extended bolts in stock, we’ve had so many orders! I expect to start seeing many more E34s on the interwebz rocking these great brakes.

[Fatandre]

Really? That many ordering those?

[84318i]

Do these clear e38 style 32s ?
I checked the link and don’t see details on what calipers and rotors we need to source ? Are these 335i rotors and calipers / carriers ?

[BleedsBlue]

Really? That many ordering those?

Yes, we are surprised but happy.

Do these clear e38 style 32s ?
I checked the link and don’t see details on what calipers and rotors we need to source ? Are these 335i rotors and calipers / carriers ?

What size/offset are E38 Style 32s? I think we will start providing a printable template for people to check clearances.

We offer the calipers and rotors new, for the best price online. If you are sourcing them yourself, we can provide P/Ns since there are several variations of 335i rotors and calipers - but in a word, yes they are regular F30 335i 4 piston calipers (there is no carrier) and 340mm rotors.

[84318i]

Hi Brent , style 32s are 17x8 front (17x9 rear) offset is 20 on the fronts .

Thank you

[BleedsBlue]

Hi Brent , style 32s are 17x8 front (17x9 rear) offset is 20 on the fronts .

Thank you

Cool - we have not had good luck with most 17s, so it would come down to inner barrel clearance. We're working on a template you could print out to check in any given wheel, since this question keeps coming up. Stay tuned on that; otherwise, we have confirmed M Systems fit. And obviously 18s.

[84318i]

Cool - we have not had good luck with most 17s, so it would come down to inner barrel clearance. We're working on a template you could print out to check in any given wheel, since this question keeps coming up. Stay tuned on that; otherwise, we have confirmed M Systems fit. And obviously 18s.

Awesome , I’ll wait for it .

[XCRN]

17" Style 138s clear easily.

[93FIM5]

17" Style 138s clear easily.

My hero.


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[Fatandre]

how about pics of those who have mounted them?
I am just working on caliper purchase