GTX4 Flagship Racing Big Brake Kit – Monoblock Forged Calipers, 4-Piston Design, GT3 & GT4 Track-Tested

Description

SET GTX4 Monoblock 4-Piston GT Caliper

GT racing standard. 1.9kg. One-piece forged. The GTX4 represents the pinnacle of SET’s engineering: a monoblock (one-piece) forged caliper with internal oil passages, hollow construction, and nickel-manganese pistons with heat-dissipation grooves. Under 1 tonne of hydraulic load, the entire caliper body deflects just 180 microns at its weakest point.

Engineering Highlights

One-piece forged construction eliminates the bolted joint that is the primary weakness of conventional two-piece calipers. Internal oil passages (rather than external hoses) reduce fluid volume and improve response. The asymmetric rear profile is optimised through finite-element analysis to direct braking forces along the caliper’s strongest axis. Anti-retraction springs at the base prevent pad drag, reducing disc wear and heat buildup.

Technical Specifications

• Construction: Monoblock (one-piece) forged
• Pistons: 4-piston, nickel-manganese alloy with heat-dissipation grooves — 41.3mm×2 + 36mm×2 (front) / 34mm×2 + 27mm×2 (rear)
• Piston Area: 47.12cm² (front) / 29.59cm² (rear)
• Weight: 1.9kg
• Max Stroke: 12mm
• Pressure Build Time: 25ms
• Seal Temperature Rating: 240°C
• Pad Thickness: 20mm
• Pad Friction Area: 64cm²
• Bracket Material: 7075 aluminium
• Deflection: 180 microns under 1-tonne load

Compatible Disc & Wheel Sizes

Ideal For

Primarily designed as the rear caliper for the GTX6 system. Also suitable as a front caliper for lightweight GT racing applications, or as a universal front/rear option for GT4 and GT3-class vehicles including Porsche, Ferrari, BMW M, and Toyota SUPRA builds.

Included: ZZ-grade competition brake pad compound. Benchmarked against DS3.12/DTC70. Operating temperature: constant 600°C, peak 850°C. Friction coefficient 0.55–0.63.

Note: The SET Performance Gauge is sold separately and is not included in the brake kit.

Lead Time: Approximately 5–14 business days.

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