So I own a 2005 IS300 and bought some used OEM Calipers and found out they didn't mount up. I'm thinking these are off a GS300/SC300... ??? Can anyone confirm if the GS300/SC300 share the same part number calipers? Looking to sell these back again and I don't want to mislead any potential buyers. Thanks!

 

GS/SC/IS same rotor diameter/brake pad/caliper. However the IS caliper has different mounting holes, so it's different. Think I seen you ask this same question at my.is