Toyota Vellfire Big Brake Kit Upgrade / TTSPORT Classic 8703/8903
The Toyota Vellfire has built its reputation on a plush cabin and a chauffeur-grade ride, but a fully loaded example easily tips the scales past two tons. That mass doesn't care about interior comfort when it's time to stop — and the factory brakes on this Vellfire were starting to feel overwhelmed in anything beyond routine city driving. This case study covers a front-and-rear TTSPORT big brake kit installed to close that gap.
Owners of large, heavy MPVs like the Vellfire often treat the brake system as an afterthought — it copes fine with normal driving, right up until it doesn't. On a vehicle this heavy, stopping distance and pedal consistency under repeated hard braking matter just as much as horsepower. This build swaps in a front six-piston / rear four-piston TTSPORT setup, plus a dedicated caliper for the electronic parking brake.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Toyota Vellfire, fitted behind factory 20-inch wheels |
| Front caliper | TTSPORT TT8703 cast six-piston caliper, staggered piston bore layout, steel pistons |
| Front rotor | TTSPORT 380x28mm high-carbon heat-treated curved-vane rotor |
| Rear caliper | TTSPORT TT8903 cast four-piston caliper |
| Rear rotor | TTSPORT 380x28mm high-carbon heat-treated curved-vane rotor |
| EPB caliper | TTSPORT electronic parking brake caliper, split-cast mechanical design, for dual-caliper rear installation |
| Brake lines | TTSPORT stainless steel brake lines |
Up front, the TT8703 six-piston caliper is a cast unit built with staggered piston bore sizes — larger pistons toward the leading edge, smaller ones trailing. That layout is meant to apply more even clamping pressure across the pad face as it moves through the caliper, which translates to a more linear pedal and pad wear that stays consistent instead of tapering off on one edge. Steel pistons help the caliper hold up under sustained heat.
Why It Works
- Staggered-bore piston layout on the front TT8703 caliper delivers a more linear pedal feel and more even pad wear across the friction surface.
- Larger 380x28mm rotors front and rear add rotor mass and swept area over the factory setup, giving the system more capacity to absorb and shed heat before fade sets in.
- The rear uses a dual-caliper arrangement — the TT8903 four-piston performance caliper alongside a dedicated TTSPORT EPB caliper — so the electronic parking brake keeps working without cutting or modifying factory components.
- Stainless steel brake lines replace the factory rubber lines, cutting down on line expansion under pressure for a firmer pedal.
Combining a bigger front six-piston caliper with a smaller rear four-piston caliper is a common pairing on heavier passenger vehicles — it keeps front-to-rear bias in check while still adding meaningful clamping force and heat capacity at both ends.
Installation Gallery
FAQ
Does this brake kit work with the Vellfire's electronic parking brake?
What wheel size was this kit installed behind?
What does the rear brake kit include?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.