Brakes› Brake Systems And Components
Wilwood
Wilwood Caliper-GN6R-R/H-Black Ano (.80 Thk Pad) 1.75/1.38/1.38in Pistons 1.38in Disc
SKU: W00B 120-13948
Moderate — 2–4 hours
Description
Part #: 120-13948
Grand National GN6R forged aluminum six-piston radial mount calipers bring current state-of-the-art design, materials, and manufacturing technology to this long standing icon in the Wilwood caliper line. With a High-strength forged aluminum body in either hard-anodized or Quick-Silver nickel plate finish and Compatible with rotors from 1.25" to 1.38" thickness and diameters from 12.19" to 13.06". Two body widths are available for use with .80" (20,3) or .99" (25,0) thick pads. Stainless steel pistons are included base model GN6R anodized calipers and Thermlock (R) pistons in the GN6R/ST models. Uses 3.5" or 6.0" center mount bracket kits to replace all previous Grand National caliper models.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Wilwood |
| Part Number | W00B 120-13948 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy