Vented Rotor Stock Strut, Yes it all bolts on Options

[djway]

It was suggested I make this a stand alone thread so here it is. This will work for 4 or 5 lug wheels.
Parts
07,08 cayman, 05-08 boxster 2.7L (non-S) rotors.
298x24 front
299x20 rear.
Calipers 97-08 Boxster
07-08 Cayman
Adapter mount for rear caliper. Re-drilled rear hub or the soon to be released 5lug hub from URO. If you want to keep 4 lug have the Boxster rotor drilled.
Front hub that goes right onto the stock strut and can use 4 or 5 lug wheel. Front rotor mount adapter.
I have not tried but am told 15” alloy works.
Rear

Front



Once the URO rear hub is available (announced Nov 2020) this entire upgrade to Boxster brakes with 5 lug will be an off the shelf bolt on affair.
edit I believe it can be done for both early and late struts. the struts shown are late which was harder to work out.

[djway]

I found Lanner through an insane VW Fastback build on the samba.
I first brought up the idea of adapting to the early struts because they are basically the same architecture as the type 3 and other VWs ball joint setup, and already done. I then got the idea to see if he could adapt to the later strut as the only change was the step back ears which I knew could be worked around after doing BMW front calipers.
I got some buggered up struts from Bruce Stone to add late model ball joints to early struts (before I found Lanner) I sent one to Lanner and in no time he figured it out. We even discussed bearing loads. He sent me pictures and I said “let’s do it.”
I found used calipers but you can purchase at local FLAPS. I found an amazing deal at Rock Auto on a complete set of 4 high carbon coated rotors with pads. I already had some studs. You need to select those based on wheel and any spacers you may use. Lanner supplies mounting hardware.
As for parking brake I will either use an inline hydraulic lock or one of the Wilwood cable operated units that welds onto the trailing arm. I think the lock plus leaving in gear should suffice for the majority of situations I may encounter.
The only downside I have found is that the screw holes to fix rotor to hub don’t line up on Boxster rotors to 914 hubs. I didn’t spend much time on that and I could be missing something.
I have started research on another project that I will have Lanner bring to life but it will be a bit yet.