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1GN-IS300 GS350 BRAKE ROTOR SET

$599.00Price
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Upgrade your braking system with this high-performance 2-piece semi-floating rotor, engineered specifically for precision fitment and durability.

Designed to pair seamlessly with 2006-2024 Lexus GS350 4-piston calipers (found on and GS350 F 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 GS350 rotors or standard aftermarket options. It features a custom-engineered offset designed exclusively for compatibility with the 1999–2005 IS300 spindle.

If you're looking for a direct replacement rotor for the ISF/GSF model, please refer to our other listings.

Key Features:

  • 2-piece semi-floating rotor design

  • Compatible with Lexus ISF 4-piston calipers (2006-2024 Lexus GS350)

  • High-carbon steel construction for durability and heat resistance

  • Heat-treated for improved performance and longevity

  • Custom offset for 1999–2005 IS300 spindle fitment

Built for enthusiasts who demand precision and performance, this race rotor is an ideal upgrade for custom brake setups.


  • These are the standard 2IS IS350 4-pot brakes.

    1. 2013+ GS350 F-Sport FRONT CALIPERS

    The 2013+ GS350 F-Sport uses a larger Advics 4-pot setup.

    These are NOT the same as regular GS350/non-F brakes.

    Important:

    • Uses 14" rotors (356mm)

    • Direct bolt-on to many Lexus knuckles

    • Same pad shape as IS350 4-pots

    • Requires 18"+ wheels

    2. IS F FRONT CALIPERS (BREMBO)

    The IS F uses true Brembo 6-piston front calipers.

    Model

    Caliper Type

    Rotor Size

    2008-2014 IS F

    Brembo 6-piston

    360x30mm

    Key interchange info:

    • IS F calipers bolt onto many Lexus platforms

    • Typically paired with:

      • 2013+ GS350 F-Sport rotors

      • RC350 F-Sport rotors

    • IS F OEM rotors are usually NOT used during swaps due to offset/hub differences.

    Common swap:

    • IS F Brembos

    • GS350 F-Sport 356mm rotors

    • Direct bolt-on to:

      • 3IS

      • 4GS

      • RC

      • Some older IS chassis with adapters

    3. GS F / RC F FRONT CALIPERS

    The GS F and RC F share the newer-generation Brembo setup.

    Model

    Caliper Type

    APES Rotor Size

    GS F

    Brembo 6-piston

    380x34mm

    RC F

    Brembo 6-piston

    380x34mm

    These are:

    • Larger than IS F brakes

    • Require:

      • 19"+ wheels usually

      • Larger rotors

      • Dust shield trimming

    • NOT directly interchangeable with IS F rotors/calipers without matching components.

    4. INTERCHANGEABILITY SUMMARY

    A. IS350 ↔ GS350 F-Sport

    Item

    Interchange?

    Notes

    Calipers

    YES

    Bolt pattern compatible

    Rotors

    NO

    GS F-Sport uses larger 356mm

    Pads

    YES

    Same pad profile

    Brake lines

    Usually YES

    Minor variations possible

    The GS350 F-Sport calipers are basically a spaced-out larger version of the IS350 4-pots.

    B. IS F Brembos ↔ GS350 F-Sport Rotors

    Item

    Interchange?

    IS F calipers + GS350 F-Sport rotors

    YES

    IS F calipers + IS350 rotors

    NO

    IS F rotors on GS350 F-Sport calipers

    NO

    This is the most common OEM Lexus BBK swap.

    C. GS F / RC F ↔ IS F

    Item

    Interchange?

    Notes

    Calipers

    Physically similar

    Different sizing

    Rotors

    NO

    GSF/RCF are 380mm

    Wheels

    Different clearance

    Usually 19"+ required

    5. IS300 BBK SWAPS

    Swap

    APES 2 Piece Rotor Used

    Notes

    IS350 4-pot upgrade

    334mm IS350


    GS350 F-Sport upgrade

    356mm GS rotor


    IS F Brembo swap

    GS350 F-Sport 356mm


    GS F / RC F swap

    380mm


    6. QUICK IDENTIFICATION GUIDE

    Caliper

    Pistons

    Easy Visual

    IS350

    4

    Smaller Advics

    GS350 F-Sport

    4

    Larger Advics body

    IS F

    6

    Brembo logo

    GS F / RC F

    6

    Larger Brembo, thicker rotor


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