BBK: upgrade stock IS250 Brakes to 2019 GS350 F-Sport Brakes
06-10-23, 12:55 PM
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Join Date: Jan 2021
Location: CA
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Factory 18" wheels should clear these brakes without issue. Aftermarket wheels may have issues unless they are 19's (for 2- or 3-piece wheels) or have spoke designs with decent caliper clearance (for 18's or larger).
Another item that should be mentioned is that the aluminum hats on the 2-piece rotors are not designed to accept steel wheels. This isn't normally an issue, but can come up when needing to use your spare tire. The IS spare will not clear these brakes and is a steel wheel. If using these brake rotors, you should use an appropriate aluminum spare wheel. 42611-30F41 is the correct wheel to use with these brakes with a T145/70D18 tire.
For backing plates, 47781-53050 and 47782-53050 are the correct backing plates when using these brakes on a RWD 2IS.
Jeff
Another item that should be mentioned is that the aluminum hats on the 2-piece rotors are not designed to accept steel wheels. This isn't normally an issue, but can come up when needing to use your spare tire. The IS spare will not clear these brakes and is a steel wheel. If using these brake rotors, you should use an appropriate aluminum spare wheel. 42611-30F41 is the correct wheel to use with these brakes with a T145/70D18 tire.
For backing plates, 47781-53050 and 47782-53050 are the correct backing plates when using these brakes on a RWD 2IS.
Jeff
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