GP200 Caliper Caliper – Part No: 120-12178
Call (805) 388-1188
GP200 Caliper
Prod #: 120-12178
Price: $128.64

GP200 Caliper - Product Summary
Caliper No: 120-12178
GP200 Caliper

Piston Count 2
Piston Area (in²) 1.23
Piston Type Stainless
Dust Boot No
Rotor Dimensions
Rotor Width (in) 0.25
Rotor Diameter(in) 11.00
Pad Dimensions
Pad Area (in²) 1.83
Pad Volume (in³) 0.34
Duty Rating & Material
Material Billet Aluminium
Weight(Lbs) 0.9
Colors & Finish
Color Anodize
Finish Type III Anodize

Mount Center(in) 2.38
Mount Position
Mount Side Universal
Mount Type Lug
UPC Number
UPC 889545002768
Product Documents
Product Data Sheet

Click To Download
Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-12178 - Product Description

GP200 Caliper

The GP 200 billet caliper represents the newest lightweight (only .90 pounds) caliper specifically designed for tight fit applications while utilizing a standard 2.38” lug mount. Now available (depending on part number) in either 1/8-27 NPT or a 3/8-24 fluid inlets. The GP 200 combines superior strength with a type III hard anodized finish along with several new performance features. The strength of the GP 200 is a combination of process and design. GP 200 calipers are fully CNC machined from premium grade alloy billet. The FEA generated body design incorporates a highly fortified transition between the piston housings and the bridges. Strengthening this critical area of the caliper has substantially increased its resistance to deflection and body separation under load.

Structural deflection and volume displacement testing have proven the efficiency of this innovative design. Reductions in overall deflection, and the subsequent decreases in fluid volume displacement, translate to increased clamping efficiency with less pedal travel. The bottom line is a firm, responsive pedal with outstanding stopping power. The GP 200 uses heavy wall stainless steel pistons to resist corrosion and slow the heat transfer from the pads. The heavy wall sectional thickness improves pedal firmness and adds to the overall clamping efficiency by eliminating piston backside deflection at higher system pressures.

Every GP 200 caliper is also fitted with replaceable stainless steel SRS bridge plates. SRS plates eliminate the bridge wear caused by pad gouging to extend the service life of the caliper body. The spring-loading action of the SRS plates also eliminates pad rattle and dampens the vibration harmonics that contribute to squeal during engagement. The package is completed with internal fluid passages and four corner bleed screws that allow mounting in any front, rear, left, or right side position.

Product Specifications

Rotor Compatibility
Rotor Width (in) 0.25
Maximum Rotor Width (in) 0.25
Minimum Rotor Width (in) 0.19
Maximum Rotor Diameter(in) 11.00
Minimum Rotor Diameter(in) 8.00

Brake Pad Specifications
Brake Pad Type 1 4908
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 1.83
Total Pad Volume (in³) 0.34
Piston Specifications
Piston 1 Bore (in) 1.25
Piston 2 Bore (in)
Piston 3 Bore (in)
Total Piston Area (in²) 1.23

Mounting Specifications
Mount Type Lug
Mount Side Universal
Mount Center(in) 2.38
Mount Hole Size(in) 0.32
Mount Height(in) 1.10
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the GP200 Caliper Pad Dimensions for the GP200 Caliper Zoom Image
Axle Set P/N
Pad Type
Non-Bedded Pads - by Compounds
Mount Dimensions & Part Numbers

Dimensions for the GP200 Caliper Dimensions for the GP200 Caliper Zoom Image

Additional Notes

Parts & Accessories

O-Ring Kit 130-3602
Replacement Dust Boot N-A
Replacement Piston 1 200-8488
Replacement Piston 2 N-A
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit N-A
Wear Plate L/H N-A
Wear Plate R/H N-A
Pad Retainer N-A
Bleed Screw Kit 220-7496
Self Bleeder Tube N-A
Cross-Over Tube N-A
Products commonly used with this item:

More Details
More Details
More Details
More Details

Additional related products:

More Details
More Details

All images shown are for illustrative purposes only. Actual product received may be different than what is portrayed on the web site.
Wilwood makes every effort to maintain our web site to ensure the accuracy of prices and product information. However, product information and prices are subject to change without notice. Please call (805) 388-1188 before ordering to verify current prices and product information.
     Copyright ©2021 Wilwood Engineering, Inc. - All Rights Reserved     
Version: 3.05 June 23, 2023