RacingBrake® 2151-K - Slotted Iron 1-Piece Rotor Front Big Brake Kit

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Product Details

Slotted Iron 1-Piece Rotor Front Big Brake Kit by RacingBrake®. This rotor is upgraded from OE straight vane to curved vanes as we deem necessary for performance, as most people are aware that curved vanes pump more air and keep Rotor cooler than straight vanes, however the curved vane discs are "directional" meaning left and right discs are different and requires two sets of tooling instead of just one set in the case of straight vanes.



Caliper Construction: Fixed
Caliper Type: 4-Piston
Driving Style: Performance / Racing
Rotor Thickness: Front: 27mm (1.06")
Outside Diameter: Front: 324mm (12.76")
Rotor Construction: 1-Piece
Rotor Material: Cast Iron
Rotor Style: Slotted
Rotor Type: Vented


  • Caliper Body: Made of forged 6061-T6. Light weight at only 4.5lbs, these new RB4000 calipers are re-designed and built for the toughest brake jobs with extended service life before any rebuild is required
  • Low Profile: Together with RB Center-Mount design two-piece rotors, you hardly even need to require a spacer to install the kit. It fits under 16’ wheel for 300mm rotors
  • Piston Material: Made of stainless steel instead of aluminum commonly used by other caliper mfgrs which can substantially reduce the heat transfer (approx 1/10 of aluminum) from the pad to brake fluid. Pistons are vented to further reduce the heat contact area and improve air circulation thereby reducing more heat transfer
  • Dust Seal: dust seal is of built-in type (instead of external boot type) uniquely designed to shield the dust and foreign material from contamination and will not rip - as commonly seen on boot type dust seals
  • Hardware: Brake pad pins and banjo connections were re-designed for easier brake line connection and brake pad replacement
  • Surface Coating: Powder coating with most durable finish for lasting appeal
  • Hardware: Most hardware is made of stainless steel for durable performance and appearance
  • Never Get Lost Bleeder Cap: Newly designed with a retaining loop so you will never have to find it again and/replace the lost ones. (made of durable EPDM)
  • Use standard FMSI brake pads (D647): A very common P/N (same as WRX 4-pot fix pistons calipers, plenty of choice for suppliers and compounds
  • Made in USA: Calipers are designed, fully assembled and hydro-tested in Fullerton, CA facility, with full after sales support/service
  • Adapter: 7075-T6 Aluminum Alloy
  • Precise manufacturing and high-grade materials
  • Expertly Crafted from the highest grade materials
  • Expertly designed and manufactured in the USA
  • Designed to help get the most out of your vehicle


  • 2 ea. One-Piece Rotors
  • 2 ea. 4-Piston calipers (RB4045)
  • 2 ea. Aluminum adapters and hardware
  • 1 Set of RB ET300 brake pads (PD647-33)Learn more on RB ET Series brake pads.

RacingBrake® has been developing and producing precision brake parts and components for the automotive and marine industries for over two decades. The company’s goal is to offer customers high-grade brake upgrades - starting from direct bolt-on factory replacement rotors and finishing with complete brake system upgrades. RB brake parts are designed and manufactured based on the company’s extensive experience and know-how in brake technology, so they guarantee the highest level of quality and reliability. Offered at great prices, RacingBrake products will exceed your expectations.

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RacingBrake warrants that at the time of shipment, the products to be free from defects in material and/or workmanship when installed and used in strict accordance with manufacturer’s instructions and maintenance practices of the automotive industry. If it appears that within 6 months of shipment, the products do not comply with the above warranty, and the buyer gives written notice to RacingBrake within thirty (30) days of discovery of such noncompliance, then after RacingBrake has examined and determined such products to be, in fact defective. RacingBrake will at its option either furnish a replacement for the defective part(s) / component(s), or issue a credit for the original purchase price of the defective product(s).

The foregoing warranty does not include off street and/or track racing applications nor any product that has been subjected to misuse, neglect, accident, or improper installation; nor does the said warranty extend to any product which has been altered, modified, or repaired; nor does the said warranty extend or apply to any product which has had the identifying symbol(s) or mark(s) removed, defaced, altered, or changed. RacingBrake will not be liable for any errors, defects, or omission in the design of any product regardless of whether such design faults result from acts or omissions of the manufacturer, supplier, buyer, or any other party.

Warning: Motorsports are dangerous. No warranty or representation is made as to products' suitability for use or ability to protect the user from any injury or death. The user assumes that risk. RacingBrake shall not be liable to purchaser or to any third party for any damages arising out of the purchase, installation or use of any item.

RacingBrake will not be liable for any loss, damage, expense, cost of repair (including labor and/or shipping), special, incidental, or consequential damage of any kind, whether or not based upon warranty expressed or implied, except for the obligations outlined above. In no event shall RacingBrake be liable for any costs more than the original purchase price of the products.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. It is neither inferred nor implied that any item sold by is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.