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In the case of the IS350 compared to the IS250, the rotor size went from 296 mm on IS250 to 334 mm on the IS350, rear rotors went from 291 mm to 310 mm, this yielded in a rough increase of 12.8 percent front and 6.5 percent rear for the rotors. beside the obvious bigger caliper which house 4 small pods on the IS350 caliper compared to the smaller single big pod on the IS250 calipers.
This project was interesting that its done on a AWD IS250, until now to my knowledge no one has done it at all.
Shortly after my post on the clublexus forum about my brake upgrade, email and forum post flooded in, i was answering emails and call about it from quite a few people who read the post and wanted someone who has the know how to do the work, but unfortunally none of them are close enough to actually come to Rallye and have the work done.
Finally, lets move onto the the install, first some before pics, picture 1,2,3 from the top.
modification had to be made to the backing plate and hub to fit the rotor properly, pictures 4,5,6,7
modification was needed for the bigger rear rotors to fit properly, picure 8
onto the caliper install
Steel braided lines, pictures 9,10,11
and finally bleed the brake system
finish picture 12
The install took about 6 hours from start to finish, a final road test confirm stopping and brake feel and now the customer has the bragging right to be the first IS250 AWD to be fitted with factory BBK and no one else with the car has.