Toyota Land Cruiser Prado Big Brake Kit Upgrade / TTSPORT Classic 8703

The Toyota Land Cruiser Prado has earned its reputation as one of the toughest, most reliable SUVs on the road — and one of the few that holds its resale value like a rock. But a heavy, capable off-roader still needs brakes that can match its weight and its 3.5L powertrain. This owner swapped the stock setup for a TTSPORT big brake kit front and rear to close that gap.

The stock four-piston caliper and factory rotor were sized for a lighter, less demanding vehicle. On a 3.5L Prado hauling real curb weight, that setup runs out of clamping force and heat capacity faster than most drivers expect. The fix here was a front and rear TTSPORT big brake kit sized to fit under the truck's 20-inch wheels.

Vehicle & Kit Specs

Up front, the monobloc TT8703 six-piston caliper replaces the factory four-piston unit, paired with a 405x34mm slotted rotor that's noticeably larger than the stock disc.

Why It Works

The TT8703's six-piston monobloc body applies more even, more total clamping force than the stock four-piston caliper — a rigid one-piece casting flexes less under load, so pedal input translates directly into pad pressure instead of getting absorbed by the caliper itself.

• Larger 405x34mm front rotor increases the effective lever arm, so the same pedal force generates more stopping torque at the wheel.
• More rotor mass means more thermal capacity, so the pads stay cooler and resist temperature spikes during repeated braking.
• Slotted rotor faces on both the front and rear discs improve heat dissipation compared to the factory solid rotors.
• Matching the front upgrade with a rear TT8903 four-piston caliper and 380x28mm rotor balances front-to-rear braking and cuts down on nose-dive under hard stops.

Together, the front and rear kit is built to give this Prado braking that can actually keep pace with its 3.5L powertrain, with a firmer pedal and more consistent feel under load.

Installation Gallery