Uploaded February 2026 | Updated September 2026, 3 days ago
With the bolt pattern of the Explorer being the same as the Mustang, it only takes a simple adapter to fit GT350 brakes on the Explorer ST. While they may be larger, do they actually make a difference in braking performance? There's only one way to find out, so we installed these and did a before-and-after 60-0mph test to figure out the answer.
Want to do this swap yourself? Here are all the part numbers needed:
GT350R Calipers:
Left - FR3Z-2B121-F
ford.oempartsonline.com/oem-parts/ford-caliper-fr3z2b121f
Right - FR3Z-2B120-G
ford.oempartsonline.com/oem-parts/ford-caliper-fr3z2b120g
GT350 Rotors:
Left - FR3Z-1125-F
ford.oempartsonline.com/oem-parts/ford-rotor-left-fr3z1125f
Right - FR3Z-1125-E
ford.oempartsonline.com/oem-parts/ford-rotor-right-fr3z1125e
GT350 Caliper Adapter: mofospeed.com/shop/ols/products/gt350-brackets-for-explorer-st
GT350 Caliper Bracket Hardware (x2): FR3Z-2068-D
ford.oempartsonline.com/oem-parts/ford-caliper-retainer-kit-fr3z2068d
GT350 Caliper Bolts (x4): W717394-S439
ford.oempartsonline.com/oem-parts/ford-caliper-bolt-w717394s439
Hawk GT350 HPS 5.0 Pads: steeda.com/hawk-hb903b-604-s550-brake-pads
GT350 Banjo Bolt (x2): W712276-S430
ford.oempartsonline.com/oem-parts/ford-bolt-banjo-w712276s430
GT350 Brake Hose Washers (x4): W711784-S300
ford.oempartsonline.com/oem-parts/ford-brake-hose-washer-w711784s300
Motorcraft DOT 4 LV High-Performance Brake Fluid: PM-20
steeda.com/motorcraft-pm-20-brake-fluid
Street Pad Bed-In Procedure:
1. To break in the new components, make 6 to 10 stops from approximately 30 to 35 MPH applying moderate pressure.
2. Make an additional 2 to 3 hard stops from approximately 40 to 45 MPH.
3. DO NOT DRAG BRAKES!
4. Allow 15 minutes for the brake system to cool down. We let them cool overnight.
5. Your brakes are now ready for use and can be driven normally.
Subscribe: bit.ly/Steeda_YT
Steeda Merch: steeda.com/steeda-apparel
---
steeda.com
Steeda Performance Vehicles
steedavehicles.com
Steeda UK:
steeda.co.uk
Steeda Europe:
steeda.eu.com
Pinterest:
pinterest.com/steedaauto/pins
Facebook:
facebook.com/steedaautosports
Instagram:
instagram.com/steedaautosports
Twitter:
twitter.com/steedaautosport
TikTok
tiktok.com/@steeda
0:00 Intro
0:22 What's Needed?
3:04 Install
4:09 Brakes Installed
5:21 Results
#explorerst #gt350 #brakes
With the bolt pattern of the Explorer being the same as the Mustang, it only takes a simple adapter to fit GT350 brakes on the Explorer ST. While they may be larger, do they actually make a difference in braking performance? There's only one way to find out, so we installed these and did a before-and-after 60-0mph test to figure out the answer.
Want to do this swap yourself? Here are all the part numbers needed:
GT350R Calipers:
Left - FR3Z-2B121-F
ford.oempartsonline.com/oem-parts/ford-caliper-fr3z2b121f
Right - FR3Z-2B120-G
ford.oempartsonline.com/oem-parts/ford-caliper-fr3z2b120g
GT350 Rotors:
Left - FR3Z-1125-F
ford.oempartsonline.com/oem-parts/ford-rotor-left-fr3z1125f
Right - FR3Z-1125-E
ford.oempartsonline.com/oem-parts/ford-rotor-right-fr3z1125e
GT350 Caliper Adapter: mofospeed.com/shop/ols/products/gt350-brackets-for-explorer-st
GT350 Caliper Bracket Hardware (x2): FR3Z-2068-D
ford.oempartsonline.com/oem-parts/ford-caliper-retainer-kit-fr3z2068d
GT350 Caliper Bolts (x4): W717394-S439
ford.oempartsonline.com/oem-parts/ford-caliper-bolt-w717394s439
Hawk GT350 HPS 5.0 Pads: steeda.com/hawk-hb903b-604-s550-brake-pads
GT350 Banjo Bolt (x2): W712276-S430
ford.oempartsonline.com/oem-parts/ford-bolt-banjo-w712276s430
GT350 Brake Hose Washers (x4): W711784-S300
ford.oempartsonline.com/oem-parts/ford-brake-hose-washer-w711784s300
Motorcraft DOT 4 LV High-Performance Brake Fluid: PM-20
steeda.com/motorcraft-pm-20-brake-fluid
Street Pad Bed-In Procedure:
1. To break in the new components, make 6 to 10 stops from approximately 30 to 35 MPH applying moderate pressure.
2. Make an additional 2 to 3 hard stops from approximately 40 to 45 MPH.
3. DO NOT DRAG BRAKES!
4. Allow 15 minutes for the brake system to cool down. We let them cool overnight.
5. Your brakes are now ready for use and can be driven normally.
Subscribe: bit.ly/Steeda_YT
Steeda Merch: steeda.com/steeda-apparel
---
steeda.com
Steeda Performance Vehicles
steedavehicles.com
Steeda UK:
steeda.co.uk
Steeda Europe:
steeda.eu.com
Pinterest:
pinterest.com/steedaauto/pins
Facebook:
facebook.com/steedaautosports
Instagram:
instagram.com/steedaautosports
Twitter:
twitter.com/steedaautosport
TikTok
tiktok.com/@steeda
0:00 Intro
0:22 What's Needed?
3:04 Install
4:09 Brakes Installed
5:21 Results
#explorerst #gt350 #brakes
