
1GN-IS300 ISF-FRONT BBK BRACKETS
These 1GN-IS300 ISF-FRONT BBK brackets are designed with motorsports forward, delivering precision and adaptability for high-performance braking systems. They come with the ability to adapt a thermal infrared laser unit to measure brake disc temperatures in real time, giving you critical data for optimal brake management. Engineered to work seamlessly with the 4 piston GS350 calipers or the ISF 6 piston calipers, these brackets ensure maximum compatibility and reliability. At Advanced Performance, we prioritize innovative solutions that elevate your vehicle's track and street performance with professional-grade components. Trust in brackets that combine cutting-edge technology with durable design for superior braking control.
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
Return Policy & Legal Disclaimers
Final Sale Policy
All sales are final. By placing an order with Apes Motorsports, the customer acknowledges and agrees that no returns, exchanges, or refunds will be issued except as expressly stated herein.
Manufacturing Defects – Limited Exception
Returns will be considered solely for verifiable manufacturing defects that materially affect the functionality of the product. Any alleged defect must be:
Specifically identified,
Reported within a reasonable time after delivery, and
Reviewed and approved by Apes Motorsports at its sole discretion.
Approval of a return does not guarantee a refund. Remedies, if approved, may include repair, replacement, or other resolutions as determined by Apes Motorsports.
Non‑Returnable Conditions
The following conditions are explicitly excluded from return or refund eligibility:
Cosmetic blemishes, surface imperfections, discoloration, or minor scratches, including those incurred during shipping or handling
Fitment issues due to incorrect ordering, vehicle modifications, or non‑standard applications
Damage caused by improper installation, misuse, negligence, accidents, or environmental exposure
Normal wear and tear
Any product that has been installed, modified, altered, or used
Minor cosmetic or functional issues may often be mitigated with assistance from our Customer Service team, subject to reasonable limitations.
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Products cannot be resold or restocked
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Customers assume responsibility for confirming compatibility, fitment, and intended use prior to purchase
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All products must be installed by a qualified professional. Apes Motorsports does not provide installation services and does not guarantee results from any installation method.
Apes Motorsports assumes no responsibility or liability for damages, failures, or losses caused by:
Improper or non‑professional installation
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Use beyond intended design or application
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Unless expressly stated otherwise in writing, all products are intended for off‑road or closed‑course use only.Apes Motorsports does not condone or authorize the use of its products on public roads, highways, or areas subject to traffic laws.
The customer assumes all risk and responsibility for compliance with local, state, and federal laws regarding product use.
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Any indirect, incidental, consequential, or special damages
Property damage, personal injury, or loss of use
Loss of profits, revenue, or business opportunities
Apes Motorsports’ total liability, if any, shall not exceed the original purchase price of the product.
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