I know absolutely nothing about brake systems. I can talk wheels, audio, etc. but pretty dumb when it comes to brakes and choosing the right parts to work together since brakes require proper matching of calipers, pads, rotors, etc.

All I really want is the 350 front system for my 250. I will probably leave the rears alone for now.

Can someone who understands brakes post links or list out what exactly I need to convert my front brakes to the 350 brakes. I believe rock auto has the bigger calipers? Do I need separate hardware? Is the 350 caliper onto my fronts a direct swap including bigger rotors?

Thanks in advance

 

I've got the same idea ) The squeaking dusty pieces of cr@p looking like brakes from a bicycle really worth to be replaced. I've ordered a complete four corner set from a brand new RC350 (actually the same of GS) from Japan, gonna get them professionally painted and installed. The 334/310 mm vented rotors and 4-piston monoblock aluminum front calipers will be at home in my 19" wheels. People who changed the fronts report about day and night increase of stopping power and the overall confidence in the system. To make a proper conversion You'll have to replace ALL the parts that nests inside the wheels: rotors, calipers, pads, pins, plates, springs, dust covers. The brake lines and caliper mounting bolts remain untouched.

 

Here is an example of the described conversion - the USB IS250 now stops thanks to the GS' front brakes, professionally painted in the body matched colour. The question is why do Lexus equip the GS250 with 4pot fronts and IS250 with a single piston toy brakes? The cars share the same power plant and the GS is a bit heavier.