TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — verified local product image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — verified local product image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image
TEI Brakes — GTS4-R Four-Piston Rear Brake Kit — supplemental local image

GTS4-R Four-Piston Rear Brake Kit

Custom-built — ships in 2-3 weeks
$1,599.00
Wheel Size
Material
Caliper Color
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Replacement Brake Pads — GTS4 (Competition Upgrade)
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Description Specifications Brake Pads Shipping information

GTS4-R is the rear counterpart to the GTS4, built for the same mountain-road driving, track days, and high-performance use. Four opposed pistons in a monoblock-forged caliper — CNC-machined from a single billet of 6082 aerospace aluminum — spread 26.45cm² of clamping area for a firm, controllable rear pedal, pairing with a slotted rotor cut in TEI's blade-pattern design and running M2 metallic pads standard with R1/R2 compounds available for track and competition use.

Fits 17–19-inch wheels. Includes caliper, rotor, brake pads, and mounting hardware.

GTS4-R is the rear counterpart to the GTS4, built for the same mountain-road driving, track days, and high-performance use. Four opposed pistons in a monoblock-forged caliper — CNC-machined from a single billet of 6082 aerospace aluminum — spread 26.45cm² of clamping area for a firm, controllable rear pedal, pairing with a slotted rotor cut in TEI's blade-pattern design and running M2 metallic pads standard with R1/R2 compounds available for track and competition use.

Fits 17–19-inch wheels. Includes caliper, rotor, brake pads, and mounting hardware.
  • Vendor TEI Brakes
  • SKU GTS4R-17-330X28MM-STD-SIL
  • Vehicle fit Mountain-road driving, track days, high-performance vehicles (rear competition)
  • Vehicle weight range 1.2–1.7 t
  • Wheel fit 17-19"
  • Install position Rear
  • Bore fit 380/392/401
  • Rotor size options 330×28D53 / 345×28D57 / 355×28D55 / 380×28D57
  • Caliper material Aluminum alloy 6082/T651
  • Process Monoblock forged
  • Piston count 4
  • Piston diameter Ø28×2 / Ø30×2
  • Total piston area 26.45cm²
  • Caliper weight 3.06kg
  • Caliper dimensions 291×169×78.5mm
  • Pad area 62.6cm²
  • Pad thickness 18mm
  • Dust protection Internal dust seal
  • Oil routing External fluid routing
  • Standard compound M2
  • Upgrade option R1 / R2 optional — for track or competition use; not recommended for routine street driving.

Every TEI kit is custom-built — bells and brackets machined for your vehicle — and ships directly from our Guangzhou facility. Steel-disc kits typically ship in 2–3 weeks, plus transit time; exact times for your destination are shown at checkout.

We ship worldwide by express courier with tracking, and you're welcome to use your own freight forwarder — just send us the warehouse contact and reference number before dispatch. Import duties and taxes, if any, are set by your customs authority and are the recipient's responsibility. See our Shipping page for full details, or contact us for a shipping estimate before ordering.

Floating vs. Fixed Calipers

See why a fixed multi-piston caliper delivers a more direct, linear pedal feel.

Floating caliperTypical OEM

A single piston acts on the inner pad. The caliper body then slides on its guide pins to bring the outer pad into contact.

Floating caliper animation The inner piston moves first, then the caliper body floats outward before the outer pad clamps. Rotor Hydraulic pressure PistonOuter pad Inner pad Caliper body floats 1. Piston pushes inner pad2. Body floats outward3. Outer pad clamps

Two sequential steps create dead travel and a slight delay in pedal feel.

Fixed multi-piston caliperTEI design

Pistons on both sides move directly and at the same time, clamping the rotor in one controlled step.

Fixed caliper animation Opposing pistons and pads move together to clamp the rotor simultaneously. Rotor PressurePressure Inner padOuter padFixed caliper body 1. Pressure builds2. Pistons move together3. One-step clamp

Clamping force F = P × S: hydraulic pressure multiplied by total piston area. The response is direct and linear.