1GN-IS300 LC500 BBK REAR ROTOR SET
Upgrade your braking system with this high-performance 2-piece rotor, engineered specifically for precision fitment and durability.
Designed to pair seamlessly with Lexus LC500 4-piston calipers (found on 2018 LC500 and Sport models), this rotor delivers enhanced stopping power and consistent performance under demanding conditions. Each rotor is heat-treated and cast from high-carbon steel, providing superior strength, improved heat dissipation, and resistance to warping.
Important Fitment Note: This rotor is not a direct replacement for factory LC500 rear rotors or standard aftermarket options. It features a custom-engineered offset designed exclusively for compatibility with the 1999–2005 IS300/Altezza (Rear) spindle and parking brake mechanism. also, you will need our proprietary caliper brackets 1GN-IS300-LC500 BBK REAR brackets.
If you're looking for a direct replacement rotor for the IS300 model, please refer to our other listings.
Key Features:
2-piece rotor design
Compatible only with the (1GN-IS300-LC500 BBK REAR BRACKETS)
High-carbon steel construction for durability and heat resistance
Heat-treated for improved performance and longevity
Custom offset for 1999–2005 IS300 (Rear) spindle fitment
Built for enthusiasts who demand precision and performance, this race rotor is an ideal upgrade for custom brake setups.
LEXUS REAR BRAKE COMPONENT INFO
Model
Rear Caliper
Rear Rotor
Rotor Size
OEM Caliper PN
2013 IS350
2-piston Advics
310mm
310x18
RH 47830-53040 / LH 47850-53040
2013+ GS350 F-Sport
2-piston Advics
345mm
345x18
RH 47830-30280 / LH 47850-30280
IS F
Brembo 2-piston
345mm
345x28
RH 47830-53070 / LH 47850-53070
GS F
Brembo 4-piston
365mm
365x26
RH 47830-0W110 / LH 47850-0W110
RC F
Brembo 4-piston
365mm
365x26
Same as GS F
2018 LC500
Advics 4-piston
359mm (“14 inch”)
359x28
RH 47830-11010 / LH 47850-11010
LC500 rear rotor OEM:
RH: 42431-11031
LH: 42432-11021
GS F / RC F rear rotor OEM:
RH: 42431-0W050
LH: 42432-0W010
INTERCHANGEABILITY
Swap
Works?
Notes
GS350 F-Sport rear on IS350
YES
Needs 345mm rotor
IS F rear on IS350
YES
Common OEM upgrade
GS F / RC F rear on IS350
HARD
Custom brackets/wheels
LC500 rear on IS350
VERY HARD
Different platform
GS F ↔ RC F rear
YES
Same Brembo setup
IS F ↔ GS350 F-Sport rear
PARTIAL
Rotor thickness differs
EASY IDENTIFICATION
Caliper
Pistons
Visual
IS350
2
Small silver Advics
GS350 F-Sport
2
Larger Advics
IS F
2
Brembo logo
GS F / RC F
4
Big Brembo
LC500
4
Large Advics rear
IMPORTANT NOTES
IS F rear
Uses thicker 28mm rotor
Better thermal capacity
Popular with IS F front swap
GS F / RC F rear
Requires:
19" wheels usually
parking brake adaptation
custom fitment
LC500 rear
Unique newer chassis
Not a normal Lexus bolt-on swap
Caliper is Advics, not Brembo
Very large rear setup recommends (APES MOTORSPORTS LC500 BBK)

