The Wilwood SRP Stagg Vane Drilled Performance Rotor is a high-duty directional rotor engineered for systems requiring maximum thermal stability and cooling efficiency. This left-hand (L/H) rotor features a 72-vane staggered internal design, which significantly increases surface area and airflow to dissipate heat faster than standard vane configurations.

The SRP series face is precision-drilled and slotted to improve braking performance by degassing the pads and clearing away brake dust and debris. This leads to a more consistent pedal feel and improved pad bite under aggressive driving conditions. Constructed to exacting tolerances, this rotor is designed for high-performance applications where 16.00-inch diameter rotors are required.

• Brand: Wilwood
• Series: SRP Performance
• Vane Design: 72 Stagg Vane (Staggered)
• Rotor Diameter: 16.00 in
• Rotor Width: 1.38 in
• Bolt Pattern: 12 x 10.75 in Bolt Circle
• Orientation: Left Hand (L/H)
• MPN: 160-16996-BK

The Wilwood SRP Drilled Performance Rotor (MPN 160-16995-BK) is engineered for high-demand braking environments that require superior thermal stability and consistent pedal response. Featuring a 72-vane staggered internal design (Stagg Vane), this rotor maximizes cooling surface area and airflow to significantly reduce brake fade and maintain structural integrity under extreme heat cycles.

As part of the SRP series, this rotor features directional cross-drilling and face-slotting. This combination enhances high-speed pad bite while providing a pathway for brake dust, moisture, and outgassing to escape the contact patch. The result is a cleaner pad-to-rotor interface and more reliable stopping power across various conditions. This rotor is designed for specialized 12-bolt mounting systems.

• Manufacturer Part Number: 160-16995-BK
• Rotor Diameter: 16.00 in
• Rotor Width: 1.38 in
• Internal Design: 72 Staggered Vane (Stagg Vane)
• Mounting Pattern: 12-Bolt x 10.75 in Bolt Circle
• Series: SRP Drilled & Slotted Performance

This Wilwood GTB Series brake rotor is engineered for high-demand competition and extreme thermal environments. Featuring a 16.00-inch diameter and 1.38-inch thickness, this rotor utilizes a staggered vane internal design to maximize airflow and heat dissipation compared to standard straight-vane configurations.

The slotted face provides consistent pad bite and prevents glazing by venting brake gases and debris, while the precision-cast iron construction ensures structural integrity under heavy braking cycles. This professional-grade component is designed for high-performance applications requiring superior heat management and stability.

• Manufacturer Part Number: 160-16994-GTB
• Rotor Diameter: 16.00 inches
• Rotor Width: 1.38 inches
• Vane Count: Staggered Vane design
• Surface Style: Slotted (GTB)
• Material: Specialized high-stability iron alloy

Wilwood Drilled Steel Rotors provide a lightweight, high-friction braking surface designed for specialized racing applications where weight and heat management are critical. Precision-machined from high-carbon steel, this rotor features a drilled pattern to reduce rotating mass and improve pad bite by allowing gasses and debris to escape the contact patch.

• Manufacturer Part Number: 160-16979
• Rotor Diameter: 11.25 inches
• Rotor Thickness: 0.25 inches
• Mounting Style: 8 on 7.18-inch bolt circle (Snap Ring)
• Material: High-strength steel
• Finish: Drilled for weight reduction and thermal efficiency

This 11.25-inch rotor is specifically engineered for snap ring mounting systems, ensuring a secure fit and predictable performance under high-stress conditions. It is a direct replacement for racers needing a durable, lightweight steel rotor that fits the 8 on 7.18-inch configuration.

This Wilwood solid steel brake rotor is engineered for high-performance applications where a lightweight and dependable braking surface is essential. Precision-machined from high-grade steel for consistent friction and minimal runout, this rotor is designed for specialized racing or custom brake setups requiring a fixed-mount configuration.

• Manufacturer Part Number: 160-16515
• Material: Solid Steel
• Diameter: 11.25 inches
• Width: 0.25 inches
• Bolt Circle: 8 x 7.18 inches
• Type: Fixed Mount

The Wilwood GT 72 Spec-37 Curved Vane Rotor is a precision-engineered braking component built for the rigors of professional racing. Manufactured from Spec-37 iron alloy, this rotor provides exceptional resistance to thermal distortion and cracking under extreme temperatures. The high-density 72-vane internal structure acts as a centrifugal pump, drawing cool air through the rotor to maintain consistent stopping power and reduce brake fade during heavy track use.

• Series: GT 72 Curved Vane
• Material: Spec-37 Iron Alloy
• Diameter: 14.00 inches
• Width: 1.25 inches
• Mounting: 12-Lug x 8.80-inch Snap Ring
• Design: 72 Curved Vanes for superior cooling
• Manufacturer Part Number: 160-15874

The Wilwood GT 72 Curved Vane Spec-37 rotor (MPN 160-15873) is engineered for professional racing applications where extreme thermal loads are standard. This heavy-duty rotor is cast from proprietary Spec-37 iron, a premium alloy designed to withstand rapid temperature cycling while providing superior resistance to distortion and cracking under competition conditions.

Featuring a 72-vane internal design, this rotor maximizes airflow and cooling surface area to maintain consistent pedal feel and stopping performance. The 12-lug, 8.80-inch bolt circle configuration is specifically designed for snap ring mounting systems, ensuring secure attachment in high-torque environments.

• Diameter: 14.00 in
• Width: 1.25 in
• Vane Count: 72 Curved Vanes
• Material: Spec-37 Iron Alloy
• Mounting Type: 12-Lug x 8.80 in Snap Ring
• Manufacturer Part Number: 160-15873

Fits 1997-2013 Chevrolet Corvette C5 and C6 models.

This Wilwood SRP series rear left-hand (LH) rotor is engineered for high-performance street and show applications, offering a balance of technical aesthetics and enhanced braking response. Each rotor is precision-machined from long-grain carbon iron castings to a tolerance of less than .001 inch for exceptional flatness, parallelism, and minimal radial run-out. The directional cross-drilled and face-slotted pattern provides a critical venting and cleaning action that reduces pad glaze and prevents irregular material build-up, resulting in a smoother pedal feel and consistent pad engagement.

To ensure long-term durability and a clean look behind the wheels, these rotors are finished with a black electro-coat for superior corrosion resistance on all non-friction surfaces.

• MPN: 160-14041-BK
• Position: Rear Left
• Diameter: 12.00 inches
• Width: 1.03 inches
• Bolt Pattern: 5 x 4.75 inches
• Material: Long-grain carbon iron
• Finish: Black Electro-Coat
• Tolerance: Precision machined to < .001 inch

Fits 1997-2013 Chevrolet Corvette C5 and C6 models (Rear Right Hand).

Wilwood SRP Series rotors provide a technical, high-performance look while delivering improved braking response for sport driving and show applications. These rotors feature a directional cross-drilled and face-slotted pattern that facilitates venting and cleaning. This action reduces pad glazing and minimizes irregular pad material build-up on the rotor faces, resulting in a consistent pedal feel and predictable pad response.

Every rotor is precision-machined from long-grain carbon iron castings to a tolerance of less than .001 inch for flatness, parallelism, and radial run-out. To ensure long-lasting durability and corrosion resistance, these rotors are finished with a protective black electro-coat.

• Manufacturer Part Number: 160-14040-BK
• Rotor Diameter: 12.00 inches
• Rotor Thickness: 1.03 inches
• Wheel Bolt Pattern: 5 x 4.75 inches
• Orientation: Right Hand (RH)
• Material: Long-grain carbon iron
• Finish: Black Electro-Coat
• Precision machined to <.001" tolerances

Wilwood GTB 60 Spec-37 rotors are engineered for extreme-duty racing environments, such as short track and road course competition. Cast from a proprietary Spec-37 iron alloy, these rotors are derived from heavy-duty military-spec materials to provide maximum resistance against thermal distortion, warping, and cracking under intense heat cycles.

This GTB series rotor features a 60-vane curved design for superior cooling capacity and airflow. The asymmetrical face slot pattern helps clear debris and gases between the pad and rotor surface, while individual dynamic balancing ensures vibration-free operation at high speeds. The GTB designation indicates a black e-coat finish, providing critical corrosion resistance for applications where environmental exposure is a factor.

• Manufacturer Part Number: 160-13786-GTB
• Series: GTB 60 Spec-37
• Material: Proprietary Spec-37 Iron Alloy
• Orientation: Left Hand (LH)
• Diameter: 15.00 inches
• Width: 1.50 inches
• Mounting: 12 on 9.75-inch Bolt Circle
• Vane Count: 60 Curved Vanes
• Finish: Black E-Coat

Wilwood GTB 60 Curved Vane Spec-37 rotors are engineered for extreme-duty short track and road course competition where thermal management is critical. These rotors are manufactured from a proprietary Spec-37 iron alloy—a derivative of military-spec technology—developed to withstand extreme operating temperatures with maximum resistance to distortion, warping, and cracking.

• Series: GTB 60 Curved Vane (Right Hand)
• Material: Proprietary Spec-37 iron alloy for superior durability
• Finish: Black E-coat for enhanced corrosion resistance
• Face Pattern: Asymmetrical GT face slots for improved pad gas venting
• Dimensions: 15.00" diameter x 1.50" width
• Mounting Pattern: 12-bolt on 9.75" bolt circle
• Precision: Individually dynamic balanced for smooth, vibration-free performance
• Part Number: 160-13785-GTB

The directional curved vane design provides the highest possible cooling capacity, ensuring a long service life even under the most demanding braking conditions. Each rotor is precision-machined to exacting tolerances, making them a direct replacement for heavy-duty racing applications requiring a 15-inch rotor with a 9.75-inch mount pattern.

The Wilwood SRP48 Drilled Performance Rotor (160-13544-BK) provides enhanced braking response and pad consistency for high-performance applications. Engineered with a precision-machined directional cross-drill and face-slot pattern, this left-hand rotor improves cooling and cleaning action across the entire range of braking intensities. By dispersing heat and gases generated at the pad-to-rotor interface, the SRP series prevents pad glazing and inhibits irregular compound buildup, resulting in a smoother pedal feel and more predictable engagement.

• Directional cross-drilling and face slotting for superior gas and heat dissipation
• Black finish provides corrosion resistance and a professional aesthetic
• Machined design reduces rotating and unsprung weight for improved suspension dynamics
• Rotor Diameter: 12.88 in.
• Rotor Thickness: 1.10 in.
• Mounting Pattern: 12 on 8.75 in. bolt circle
• Orientation: Left Hand (LH)
• Manufacturer Part Number: 160-13544-BK

Wilwood SRP Drilled Performance Rotors (SRP48 series) are engineered with a directional cross-drill and face-slot pattern to enhance braking response and pad consistency across light to heavy braking conditions. Designed to maintain a clean pad surface, the venting action of the precision-drilled holes and slots actively reduces pad glaze while dispersing gasses and heat generated at the rotor interface.

• Manufacturer Part Number: 160-13543-BK
• Rotor Diameter: 12.88 inches
• Rotor Width: 1.10 inches
• Mounting Pattern: 12 on 8.75-inch bolt circle
• Finish: Black electro-coat
• Orientation: Right Hand (RH) side
• Series: SRP48 Drilled & Slotted

The specialized surface pattern inhibits irregular pad compound build-up, resulting in smoother engagement and improved pedal feel. By removing material through drilling and slotting, this rotor also reduces rotating mass and unsprung suspension weight for improved handling dynamics.

The Wilwood GT 48 Curved Vane Spec-37 rotor is engineered for professional short track and road course competition where extreme thermal loads are constant. Cast from a proprietary iron alloy derived from military-specification technology, these rotors are designed to resist distortion, warping, and cracking under the most demanding braking conditions.

This left-hand directional rotor features 48 internal curved vanes to maximize airflow and cooling capacity. The GT asymmetrical face slot pattern provides superior pad cleaning and gas venting while reducing vibration for a consistent pedal feel. Each rotor is individually dynamic balanced to ensure smooth, vibration-free performance at all speeds.

• Series: GT 48 / Spec-37
• Material: Spec-37 proprietary iron alloy
• Rotor Diameter: 11.75 inches
• Rotor Width: 1.21 inches
• Mounting: 8 on 7.00-inch bolt circle
• Orientation: Left Hand (LH)
• Vane Count: 48 Curved Vanes
• Manufacturer Part Number: 160-13500

Wilwood GT 48 Spec-37 rotors are engineered for extreme short track and road course competition where thermal management is critical. Manufactured from a proprietary Spec-37 iron alloy, these rotors are derived from military-spec technology to withstand extreme operating temperatures while resisting distortion, warping, and cracking under heavy thermal cycling.

The GT 48 series features an asymmetrical face slot pattern and a 48-vane internal design to maximize cooling capacity and ensure consistent pad engagement. Each rotor is individually dynamic balanced to provide vibration-free performance even at high rotational speeds. This right-hand (RH) directional rotor is designed for high-performance applications requiring maximum service life and durability.

• Proprietary Spec-37 iron alloy for superior heat resistance
• 48-vane curved design for optimized cooling airflow
• Asymmetrical GT face slots for gas venting and pad cleaning
• Individually dynamic balanced for smooth operation
• 8 on 7.00-inch bolt circle mounting pattern
• Dimensions: 11.75-inch diameter x 1.21-inch width
• Manufacturer Part Number: 160-13499

The Wilwood HD 48 Spec-37 LH Curved Vane Rotor is engineered for extreme thermal environments, utilizing a proprietary iron alloy originally developed for heavy-duty military applications. This Spec-37 material provides superior resistance to distortion, warping, and cracking under intense heat cycles. Featuring a 48-vane internal design, these rotors facilitate maximum airflow and cooling efficiency for consistent track or severe-duty braking performance.

This HD Series rotor (MPN 160-13498) features a smooth pad contact face to maximize surface area and ensure uniform pad wear. Precision machining ensures balanced operation and a perfect fit for 8 on 7.00-inch mounting configurations.

• Proprietary Spec-37 iron alloy for extreme temperature stability and wear resistance
• 48-vane curved internal design for optimized cooling and structural integrity
• Smooth pad face finish ensures consistent friction and pad longevity
• Precision machined 8 on 7.00" bolt circle mounting
• Left-hand (LH) directional orientation
• Dimensions: 11.75" Diameter x 1.21" Width
• Manufacturer Part Number: 160-13498

The Wilwood HD 48 Curved Vane Spec-37 rotor is engineered for high-demand racing and heavy-duty applications where thermal stability is critical. Cast from Wilwood’s proprietary Spec-37 iron alloy—a material technology originally developed for extreme-duty military specifications—this rotor is built to withstand intense heat cycles while resisting warping, cracking, and distortion.

• Directional Vane Design: 48 internal curved vanes maximize airflow and cooling efficiency for superior heat dissipation.
• Spec-37 Iron Alloy: Proprietary iron formulation provides exceptional wear resistance and maintains structural integrity at elevated temperatures.
• Smooth Face Finish: Full detail machining with a smooth pad contact surface (non-slotted) for consistent pad wear and predictable pedal feel.
• Specifications: 11.75-inch diameter, 1.21-inch thickness, and an 8-on-7.00-inch bolt circle.

This right-hand (RH) directional rotor is a precision-machined component designed for professional-grade braking systems. Manufacturer part number: 160-13497.

Engineered for the rigorous demands of professional motorsports, the Wilwood GT48 (SPC-37-LH) curved vane rotor is designed for superior heat management and mechanical stability. This heavy-wall directional vane rotor provides high-capacity heat absorption and rapid dissipation, critical for preventing brake fade and extending the service life of both the rotor and pads during short track or road course competition.

Constructed from premium-grade, long-grain carbon iron, this rotor offers exceptional thermal stability and resistance to distortion under extreme temperatures. Each unit is detail-machined to remove unnecessary weight and eliminate stress points away from the pad sweep face. The rotor faces and outer diameter are precision-turned to tolerances of less than .001 inch, ensuring maximum flatness and parallelism.

• Part Number: 160-12962
• Series: GT48 Curved Vane
• Dimensions: 12.88in diameter x 1.10in width
• Mounting: 12 on 8.75in bolt circle
• Orientation: Left Hand (LH)
• Material: Long-grain carbon iron for high wear resistance
• Design: Asymmetrical face slot pattern for reduced harmonics and smoother engagement
• Balance: Individually dynamic balanced for vibration-free performance

The Wilwood GT-48 curved vane rotor (MPN 160-12961) is engineered for the extreme thermal demands of professional motorsports. This heavy-wall directional rotor utilizes a 48-vane curved internal design to maximize heat absorption and dissipation, effectively preventing brake fade during short-track and road course competition.

• Material: Cast from premium long-grain carbon iron for exceptional wear resistance and thermal stability.
• Precision Machining: Faces and O.D. are turned to within .001" for flatness and parallelism to eliminate vibration and run-out.
• Thermal Balance: Asymmetrical face slots reduce harmonics and improve thermal balance between the I.D. and O.D.
• Mounting Specs: Features a 12-bolt mounting pattern on an 8.75-inch bolt circle.
• Dynamic Balancing: Each rotor is individually balanced to ensure smooth, vibration-free performance at high rotational speeds.

This right-hand (RH) specific rotor is detail-machined to remove unnecessary weight and eliminate stress points away from the pad sweep face, ensuring a long service life for both the rotor and brake pads under racing conditions.

Wilwood GT 72 straight vane rotors are engineered to provide professional-grade performance and rugged durability for competition, high-performance, and sport driving applications. Designed for drivers who demand consistent braking under stress, these rotors bridge the gap between high-end racing components and affordable performance.

This rotor is cast from Wilwood's exclusive Spec-37 material, a proprietary iron alloy specifically developed to withstand extreme operating temperatures. This high-density alloy offers the highest possible degree of resistance against thermal distortion, warping, cracking, and wear, ensuring a stable friction surface even during aggressive track sessions.

• Series: GT 72 Straight Vane
• Material: Spec-37 Proprietary Iron Alloy
• Diameter: 11.00 inches
• Width: 0.810 inches
• Mounting: 6 on 6.25 inch bolt circle
• Vane Count: 72 Straight Vane
• Part Number: 160-12892

Wilwood SRP Drilled and Slotted brake rotors are engineered for performance street and custom show applications where thermal management and aesthetics are equally critical. This left-hand directional rotor features a precision cross-drilled and slotted face pattern that provides a continuous cleaning action, venting gases and dust to prevent pad glaze and irregular material buildup. The result is a consistently smooth pedal feel and improved response under various driving conditions.

• Precision Engineering: Machined from premium long grain carbon iron castings to tolerances within .001-inch for superior flatness and parallelism.
• Corrosion Resistance: Finished with a durable black electro coat to protect against rust and maintain a clean look behind the wheels.
• Specifications: 10.32-inch diameter, 0.83-inch thickness, 0.68-inch offset, and a 4 x 3.93-inch bolt pattern.
• Installation: Directional design specific to the left-hand side of the vehicle.
• Manufacturer Part Number: 160-12839-BK

The Wilwood SRP Series Drilled and Slotted Performance Rotor (Right Hand) is engineered for custom builds, show cars, and high-performance sport driving. This rotor features a directional cross-drill and face slot pattern that provides a high-tech aesthetic while actively improving braking performance. The venting and cleaning action of the precision-machined holes and slots helps reduce pad glaze and minimizes irregular pad build-up, ensuring a smoother engagement feel at the pedal and consistent response from your brake pads.

Every SRP rotor is precision-machined from long-grain carbon iron castings to a tolerance of less than .001 inch for overall flatness, parallelism, and radial run-out. To ensure longevity and a clean appearance, the rotor is finished with a black electro coat that provides excellent corrosion resistance on all non-friction surfaces.

• Manufacturer Part Number: 160-12838-BK
• Series: Wilwood SRP
• Rotor Diameter: 10.32 inches
• Rotor Thickness: 0.83 inches
• Rotor Offset: 0.68 inches
• Bolt Pattern: 4 x 3.93 inches
• Material: Long grain carbon iron casting
• Finish: Black Electro Coat
• Design: Directional Drilled and Slotted (RH)
• Tolerance: <.001 inch flatness/parallelism

The Wilwood GT 36 Spec-37 Curved Vane Rotor is engineered for high-demand applications where thermal stability is critical. Cast from a proprietary Spec-37 iron alloy, this rotor is specifically formulated to withstand extreme heat cycles while resisting warping, cracking, and structural distortion. The directional curved vane design optimizes airflow for superior cooling, while the asymmetrical GT face slots provide effective pad gas venting and debris clearance to ensure a consistent pedal feel.

• Part Number: 160-12292
• Rotor Diameter: 12.19 inches
• Rotor Width: 0.810 inches
• Orientation: Left Hand (LH)
• Mounting Pattern: 8 on 7.00-inch Bolt Circle
• Material: Proprietary Spec-37 Iron Alloy
• Vane Count: 36 Curved Vanes
• Face Pattern: GT Series Asymmetrical Slots
• Balancing: Individually dynamic balanced for vibration-free operation

The Wilwood GT36 Spec-37 curved vane rotor is engineered for professional competition and high-demand motorsport applications. Cast from Wilwood's proprietary Spec-37 iron alloy—a material chemistry derived from heavy-duty military-spec development—this rotor is designed to withstand extreme thermal cycling while maintaining maximum resistance to distortion, warping, and cracking.

Featuring the proven GT Series asymmetrical face slot pattern, this rotor provides superior pad degassing and surface cleaning for consistent brake bite. Each rotor undergoes individual dynamic balancing to ensure smooth, vibration-free operation under the most punishing track conditions.

• Manufacturer Part Number: 160-12291
• Rotor Diameter: 12.19 in
• Rotor Width: 0.810 in
• Mounting: 8 on 7.00 in Bolt Circle
• Orientation: Right Hand (RH)
• Material: Proprietary Spec-37 Iron Alloy
• Vane Count: 36 Curved Vanes
• Face Design: GT Slotted

The Wilwood GT 36 Spec-37 Curved Vane Rotor is engineered for extreme thermal stability in professional racing and high-demand applications. Cast from Wilwood’s proprietary Spec-37 iron alloy, this rotor is designed to resist warping, cracking, and distortion under the highest operating temperatures. The metallurgical formulation is derived from heavy-duty military specifications, ensuring maximum durability under stress.

This left-hand (LH) rotor features the GT series asymmetrical face slot pattern, providing superior pad cleaning and gas venting while maintaining a smooth pedal feel. Each rotor is individually dynamic-balanced to eliminate vibration and ensure precise rotation at high speeds.

• Material: Proprietary Spec-37 Iron Alloy
• Vane Design: Curved Vane for high-efficiency cooling
• Face Style: GT Asymmetrical Slots
• Diameter: 11.75 inches
• Thickness: 0.810 inches
• Bolt Pattern: 8 on 7.00-inch mounting circle
• Orientation: Left Hand (LH)
• Manufacturer Part Number: 160-12286

The Wilwood GT 36 Spec-37 Curved Vane Brake Rotor (MPN 160-12285) is engineered for professional racing and extreme-duty applications. Each rotor is cast from Spec-37, a proprietary high-carbon iron alloy developed to withstand extreme thermal cycling and resist warping, distortion, and cracking under intense braking loads. This material technology is derived from military-spec rotor development, providing a higher level of durability than standard iron rotors.

The GT series features an asymmetrical face slot pattern that effectively degasses brake pads and clears debris while maintaining a smooth, consistent pedal feel. To ensure vibration-free operation, every rotor is individually dynamic-balanced before leaving the factory.

• Manufacturer Part Number: 160-12285
• Series: GT 36 Spec-37 Curved Vane
• Orientation: Right Hand (RH)
• Diameter: 11.75 inches
• Width: 0.810 inches
• Mounting: 8 on 7.00-inch Bolt Circle
• Material: Spec-37 Proprietary Iron Alloy

The Wilwood GT 48 Spec-37 curved vane rotor is engineered specifically for the extreme thermal demands of short track and road course competition. Cast from a proprietary iron alloy derived from military-spec technology, these rotors offer maximum resistance to distortion, warping, and cracking under intense heat cycles.

Equipped with Wilwood's GT Series asymmetrical face slot pattern, this rotor provides superior pad degassing and debris clearing for consistent pedal feel. Each unit is individually dynamic balanced to ensure vibration-free performance at high track speeds, while the high-density curved vane design provides the cooling capacity required for extreme-duty braking.

• Manufactured from proprietary Spec-37 iron alloy for extreme temperature stability
• Curved vane internal geometry for optimized airflow and cooling
• GT Series asymmetrical face slots improve initial bite and pad life
• Individually dynamic balanced for smooth operation
• Direct replacement for heavy-duty racing applications
• Part Number: 160-11840
• Diameter: 12.19 in
• Width: 1.25 in
• Mounting: 8 on 7.00 in Bolt Circle
• Side: Left Hand (LH)

Wilwood GT48 Spec-37 Curved Vane rotors are engineered for the extreme thermal demands of short track and road course competition. Cast from a proprietary iron alloy derived from military-spec rotor development, these rotors provide professional-grade resistance against distortion, thermal checking, and warping under heavy racing loads.

The GT series asymmetrical face slot pattern effectively clears gases and debris while the 48-vane curved internal design maximizes airflow for superior cooling. Each rotor is individually dynamic balanced to ensure vibration-free performance and consistent pedal feel at high rotational speeds.

• Series: GT48 Spec-37
• Rotor Diameter: 12.19 inches
• Rotor Width: 1.25 inches
• Mounting Pattern: 8 on 7.00-inch bolt circle
• Rotation: Right Hand (RH)
• Vane Count: 48-Vane Curved design
• Material: Spec-37 proprietary iron alloy
• Manufacturer Part Number: 160-11839

Wilwood HD 48 Series Spec-37 rotors are engineered for extreme thermal stability and durability in high-demand braking environments. Cast from a proprietary iron alloy derived from military-spec development, these rotors provide superior resistance to distortion, warping, and thermal cracking even under intense heat cycles.

This Left Hand (LH) curved vane rotor features a smooth pad contact face and precision machining for consistent bite and extended component life. The internal 48-vane design maximizes airflow to facilitate rapid cooling, ensuring predictable performance during heavy-duty applications.

• Manufacturer Part Number: 160-11836
• Material: Spec-37 proprietary iron alloy
• Vane Count: 48 Curved Vane internal cooling
• Rotor Diameter: 12.19 in
• Rotor Width: 1.25 in
• Mounting Pattern: 8 on 7.00 in Bolt Circle
• Face Style: Smooth (Non-Slotted)
• Orientation: Left Hand (LH)

Wilwood steel rotors provide a durable, lightweight braking solution for specialized motorsports applications where low-to-moderate sustained temperatures are expected. Engineered from a proprietary steel alloy, this drilled rotor is designed to withstand intermittent high-heat spikes common in drag racing, super speedway qualifiers, and open-wheel racing.

The specific alloy and manufacturing process ensure high resistance to thermal distortion while maintaining excellent friction and wear characteristics when paired with appropriate racing brake pads. This rotor is ideal for Sprint cars, Modifieds, and lightweight road course racers requiring a high-performance 12.00-inch diameter disc with an 8-lug mounting configuration.

• Manufacturer Part Number: 160-0525
• Diameter: 12.00 inches
• Width: 0.350 inches
• Mounting: 8 on 7.00 inch bolt circle
• Material: Proprietary steel alloy
• Finish: Drilled for weight reduction and improved cooling