Honda Fit/Jazz (GK5) Big Brake Kit Upgrade / TTSPORT Direct-Mount Series
Six years after launch, the GK5 Honda Fit still commands strong resale value and heavy turnover in the used market — cheap to buy, fun to drive, and easy to modify. Under the factory single-piston brakes, though, this "pocket sports car" leaves stopping power on the table. This build swaps in a TTSPORT direct-mount kit front and back, without touching the car's 15-inch OEM wheels.
The GK5's light, stiff chassis and punchy engine already make it a fun car to push, and its huge aftermarket parts catalog means owners can go as far as they want — from stance builds to track days. Brakes are usually one of the first real upgrades, since the stock single-piston front caliper and rear drums were never built with hard driving in mind.
Vehicle & Kit Specs
This GK5 keeps its stock 15-inch wheels, so the kit had to fit within tight clearance — no spacers, no wheel swap.
| Item | Specification |
|---|---|
| Vehicle | Honda Fit GK5, 15-inch OEM wheels |
| Front caliper | TTSPORT Wood four-piston direct-mount caliper, replacing the OEM single-piston unit |
| Front rotor | 260mm x 20mm high-carbon, heat-treated one-piece rotor with drilled-and-slotted pattern |
| Rear caliper | Single-piston caliper, drum-to-disc conversion |
| Rear rotor | 260mm x 9mm high-carbon, heat-treated curved-vane rotor |
| Lines / hardware | TTSPORT stainless steel brake lines and mounting hardware |
Why It Works
A four-piston caliper clamps pad against rotor from more points and with a stiffer body than the factory single-piston sliding design, so pedal input translates into clamping force more directly instead of getting soaked up by caliper flex. The drilled-and-slotted, one-piece front rotor sheds heat faster than the stock disc, which helps resist fade when the brakes get worked hard.
- Four-piston front caliper improves pad contact and pedal response over the stock single-piston unit
- 260x20mm slotted front rotor and 260x9mm curved rear rotor add heat capacity for better fade resistance
- Direct-mount fitment for the front and a drum-to-disc rear conversion, both packaged to clear the stock 15-inch wheel
On the rear axle, swapping the drum brakes for a disc setup with a dedicated single-piston caliper is easier to maintain, keeps the rotor face cleaner than a drum, and lets the rear axle contribute more evenly to overall braking — which is what actually shortens stopping distance rather than just improving front bite alone.
Installation Gallery
Does this TTSPORT brake kit fit the stock 15-inch wheels on a GK5?
What's included in the front and rear kits?
Why upgrade both the front and rear brakes instead of just the front?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.