Ford Explorer Big Brake Kit Upgrade / TTSPORT Classic 8657
The Ford Explorer is a big, heavy three-row SUV, and a heavy SUV asks a lot of its brakes — especially one running a 2.3L turbo AWD drivetrain with real towing and highway miles. This case covers an Explorer owner who moved off the factory brakes to a TTSPORT TT8657 six-piston big brake kit up front.
The Explorer in this build runs Ford's 2.3L turbocharged four-cylinder, good for 203 kW (about 272 hp) and 425 Nm of peak torque, paired with a 10-speed automatic and all-wheel drive. That's a lot of mass and momentum for a set of factory calipers to manage, which is the usual reason owners of this platform start looking at a big brake kit.
The upgrade fitted here: a TTSPORT TT8657 six-piston front caliper, matched to a 405x34mm high-carbon heat-treated brake rotor and TTSPORT stainless steel brake lines — confirmed to clear the vehicle's stock 21-inch wheels.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Ford Explorer, 2.3L turbocharged, AWD, 10-speed automatic, 21-inch wheels |
| Front caliper | TTSPORT TT8657 six-piston forged, opposed pistons 38mm / 34mm / 30mm, total piston area 54.96 cm² |
| Front rotor | 405x34mm high-carbon heat-treated, cross-drilled and slotted |
| Lines | TTSPORT stainless steel brake lines |
The TT8657 uses an opposed six-piston forged layout, with staggered 38/34/30mm bores adding up to 54.96 cm² of piston area. TTSPORT tested the caliper across both street and track use before releasing it for this fitment.
Why It Works
- A forged, opposed six-piston caliper flexes less under load than a stock sliding caliper, so more of the pedal input goes straight into clamping force instead of getting absorbed by caliper deflection.
- More piston area (54.96 cm² total) spreads clamping force across a larger pad surface, which helps shorten stopping distances and sharpen brake response on a heavy SUV.
- The cross-drilled, slotted 405x34mm rotor design lets brake dust and gas escape the pad-rotor interface, keeping the surface cleaner while it also cuts noise and vibration.
- Internal venting pulls heat away from the rotor faster during repeated hard braking, which is what keeps fade from creeping in on long descents or towing runs.
- The kit clears the Explorer's factory 21-inch wheels in this fitment, so no spacers were needed to run the larger front rotor and caliper.
Installation Gallery
What wheel size does the TT8657 kit fit under on the Ford Explorer?
What comes in the TTSPORT TT8657 kit for the Explorer?
How big are the pistons in the TT8657 caliper?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.