S44C

S44C — front compact 4-piston caliper for small cars (A0 class). OVERVIEW S44C is a compact 4-piston caliper developed specifically for small and mid-size vehicles. The body is forged from aluminium alloy: forging delivers high rigidity, tensile strength, toughness and material density. Compared with cast aluminium calipers, body rigidity is about 50% higher, which reduces the risk of caliper failure in service. The built-in double oil seal (instead of ordinary external dust boots) makes the brake feel and reaction more precise. After anodizing and vacuum coating (CVD) the colour is locked in: the coating does not crack or peel and gives the caliper a metallic sheen and vivid colour. Its compact design is optimised for specific vehicle models: four pistons match the car's characteristics better and raise braking performance. HIGHLIGHTS • Compact 4-piston caliper for small and mid-size cars. • Compact design optimised for specific vehicle models. • Four pistons match the vehicle better and improve braking performance. • After multi-stage testing, performance is about 25% above the stock caliper. • With high-performance pads it confidently handles intense driving, including mountain roads. CALIPER SPECIFICATIONS • Weight: 1834 g/pc • Piston area: 45.31 cm² • Piston diameter: 42 mm × 2 / 34 mm × 2 • Brake disc diameter: Ø300 mm–Ø282 mm • Brake disc thickness: max 24 mm / min 22 mm • Caliper dimensions: D121 × H67.21 × W222.5 mm • Oil inlet thread: M10×1 • Mounting hole centre distance: 160 mm • Mounting hole offset: 25 mm • Mounting hole diameter: 10.25 mm • Distance from mounting plane to the top of the disc: 31.08 mm BRAKE DISC • Friction surface width: Ø282 mm × 23–43 mm; Ø300 mm × 23–52 mm • Ventilation: Ø282 × 23 — 64 curved ducts, 6 slots, PCD 183 mm; Ø300 × 23 — 64 curved ducts, 7 slots, PCD 183 mm • Heat treatment: 580 °C heating / 120 °C cooling, cycled for 72 h • Mounting hole diameter: Ø8.1 mm • Centring ring: Ø164 mm (for 282×23 and 300×23 discs), petal step 0.2 mm • Surface treatment: iron phosphating, ground friction surface • Disc standard: GG20HC BRAKE PADS • Model: S44C • Thickness: 12 mm • Friction surface width: 48 mm • Friction block area: 44.9 cm² • Compound: F500 (standard) / F600 (street, optional) / S750 (street & track, optional) / R900 (track, optional) / S800 (for carbon-ceramic discs, optional) QUALITY CONTROL • Forged body tensile strength: Qb ≥ 320 MPa • Body hardness: HV ≥ 400 • Low-pressure seal test: 0.4 MPa air, hold 5 s, pressure drop ≤ 100 Pa • High-pressure seal test: 12 MPa air, hold 5 s, pressure drop ≤ 0.2 MPa • Appearance: anodized surface free of damage, uniform colour and gloss • Ultra-high pressure test: sampled calipers withstand 30 MPa oil pressure without failure • Other characteristics per QC/T592.