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For PCI you have to get the sub seat attachment for what used to be about $35. It bolts onto the center part of the mount. I have both for driver(fixed) and passenger (slider). Both very solid. (see full post)
https://www.ebay.com/itm/287493156059?chn=ps&norover=1&mkevt=1&mkrid=711-166974-028196-7&mkcid=2&mkscid=101&itemid=287493156059&targetid=2304343365564&device=c&mktype=pla&googleloc=9029971&poi=&campaignid=22813919009&mkgroupid=181469869574&rlsatar... (see full post)
I have a vorshlag seat mount, but it took some rework to fit my narrower sparco circuit II. It is also a tank of a unit, very heavy.I am collecting the brey-krause mount components, ave seen them on another 550 and they work well.I also... (see full post)
Modulation with the AP system is superb. Nick even says it is better than the Brembo system in the DHR but overall braking performance with the Bosch ABS system is better than OEM 350 or even the FP 350 setup he had in the white car. You don’t... (see full post)
This guy started the swap, with photos. I don't know whether he ever finished.https://www.mustang6g.com/forums/threads/s650-to-s550-rear-brembo-retrofit.231054/ (see full post)
The brakes are still hydraulic. They are electronically boosted.The rears have an electronic parking brake, which the S550 has a mechanical.But the brakes themselves should work. You just have to figure something out for the parking brake... (see full post)
update
Real good info on the REAR BRAKES
Some update and great info for many of us.
I'm researching the best option for optimizing heat management for rear brakes in the PP mustang.
Small summary.
As you know we have 1 single huge piston... (see full post)