Hyundai Elantra Big Brake Kit Upgrade / TTSPORT Slim SL6
Elantra owners asking for a big brake kit kept running into the same wall: nothing fits behind stock 17-inch wheels without spacers, and spacers change more than just the brakes. TTSPORT built the Slim Series SL6 six-piston kit specifically to solve that — a direct-fit front upgrade that bolts in behind the factory wheel, no fender rolling, no offset games.
This install went on a Hyundai Elantra running its original 17-inch wheels. The goal was simple: swap the soft, undersized stock front brakes for something with real pad area and a rigid caliper, without touching the wheels or ride height.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Hyundai Elantra, stock 17-inch wheels |
| Front caliper | TTSPORT SL6 — Slim Series, forged six-piston, two-piece body |
| Front rotor | TTSPORT 330mm high-carbon, heat-treated rotor |
| Bracket | Vehicle-specific custom caliper bracket |
| Pads / lines | TTSPORT high-performance street pads, stainless steel brake lines |
| Hardware | Brake fluid, mounting bolts, and fastening hardware |
The table below is TTSPORT's official spec sheet for the SL6 caliper used in this build.
| Brake Caliper | |
|---|---|
| Series | Slim Series |
| Model / Application | SL6 |
| Axle Position | Front |
| Piston Count | 6-piston |
| Piston Type | One-piece heat-insulated pistons |
| Piston Diameter | 28 mm × 2 / 30 mm × 2 / 36 mm × 2 |
| Caliper Dimensions | L 350 mm × W 135 mm × H 120 mm |
| Total Piston Area | 46.8 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 3.60 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 17 in or larger |
| Recommended Rotor Size | Ø330–355 mm × 28 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 82 |
| Caliper Mounting Type | Radial mount with vehicle-specific caliper brackets |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
Everything the swap needs ships together: the SL6 caliper, the 330mm rotor, a bracket machined for this specific hub, street-oriented pads, stainless lines, and the small parts (fluid, bolts) that usually turn into a second trip to the parts store.
Why It Works
- Fits behind the Elantra's stock 17-inch wheel — no spacers, no offset changes, no fender work.
- Two-piece forged caliper body with a through-bolt design adds rigidity, so the caliper flexes less under hard braking and the pedal stays firm instead of going soft.
- The six-piston layout uses uneven bore diameters (28/30/36mm), which spreads clamping force more evenly across the pad and gives a more linear, predictable brake feel.
- An extensively cut-out, lightweight caliper body improves heat dissipation, which helps limit thermal fade during repeated hard stops.
- The 330mm high-carbon, heat-treated rotor adds thermal stability and wear resistance over the stock disc, supporting the added clamping force from the SL6 caliper.
- At 350 × 135 × 120mm, the caliper fills out the wheel visually without crowding the spokes.
Installation Gallery
Frequently Asked Questions
Does the TTSPORT SL6 kit fit the Hyundai Elantra's stock wheels?
What's included in the SL6 big brake kit for the Elantra?
What rotor sizes does the SL6 caliper accommodate?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.