Description

Brembo GT-A Big Brake Kit — GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES) 2014–2018 (Rear, 380×32 4-Pot)

Genuine Brembo GT-A 4-piston 2pc rear big brake kit engineered for the 2014–2018 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES). Upgrade to Brembo’s 380x32mm 2-piece floating disc assembly for greater thermal capacity, reduced fade, and linear pedal feel on the street or the track.

Key specifications

Caliper family	Brembo GT-A (4-piston 2pc)
Disc size	380 × 32 mm 2-piece
Bell material	CNC-machined 7075-T6 aluminium, hard-anodised black
Rotor patterns available	Drilled (standard), Slotted Type 1 (street/track), Slotted Type 3 (aggressive track — racing use only), Slotted Type 5 (racing use only)
Caliper colours	Black, Red, Silver
Minimum wheel size	19″
Axle	Rear
TÜV/KBA	Not approved — contact AME for regional compliance
Road use	✓ Street legal

What’s included in this Brembo GT-A kit

• 2× Brembo GT calipers (colour of choice)
• 2× 2-piece floating rotors 380x32mm (LH + RH)
• 1× Brembo brake pad set (street-performance compound)
• 2× CNC-machined aluminium caliper mounting brackets
• 1× set of stainless-steel braided brake lines (DOT-compliant)
• Complete mounting hardware (bolts, washers, pins, clips)
• Brembo installation instructions (EN/IT)

Why upgrade to Brembo GT-A

• Greater thermal capacity: 380mm 2-piece floating rotor dissipates heat faster than OEM discs, delivering fade-free performance under sustained heavy braking.
• Stiffer, more linear pedal feel: 4-piston 2pc construction eliminates caliper flex, giving you the same pedal response on lap 1 and lap 20.
• Lower unsprung weight: 2-piece floating assembly reduces rotational mass by up to 22% per wheel vs stock single-piece OEM rotors.
• Italian OEM quality: Built on the same production line that supplies Porsche, Ferrari, and AMG performance models from the factory.
• 3 caliper colours: Match your wheel and interior accents with Black, Red, Silver.

Fits: GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES) (2014–2018, Rear axle)

Designed as a direct upgrade for the OEM braking system on the 2014–2018 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES).

• 2014 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)
• 2015 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)
• 2016 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)
• 2017 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)
• 2018 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)

Minimum wheel size: 19″ (recommended 20″ for optimal caliper clearance).

Important compatibility notes

• ⚠ Brembo GT Systems are designed for vehicles at original ride height. Increased ride height is not compatible with the brake lines included in these systems.

Installation

• Professional workshop fitment recommended
• Average install time: 2–3 hours per axle
• Tools required: standard caliper/brake tools + torque wrench + brake bleeding kit
• Brake fluid: DOT 4 (Brembo specification), bleed required after install
• Fitment partner network: AME Motorsport partners across Sydney, Melbourne, Brisbane — contact us for referrals

Frequently asked questions

Will this Brembo kit fit my 2014–2018 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES)?

Yes — this 4-piston GT-A front kit is engineered specifically for the 2014–2018 GMC 1500 SIERRA (GMT K2XX) (EXCLUDING ALUMINUM KNUCKLES) rear axle at OEM ride height. If your car is lowered more than 25mm or has non-standard wheels under 19″, contact us first.

Are brake pads included?

Yes — one set of Brembo street-performance brake pads is included. Optional upgrades to Pagid, Ferodo, or Schaffen compounds are available.

What brake fluid does Brembo recommend?

DOT 4 meeting Brembo’s specification (minimum dry boiling point 260°C). We recommend Motul RBF600 for street and RBF660 for track use.

Do I need wheel spacers?

No — all Brembo GT-A kits are designed to fit within OEM wheel offset and caliper clearance specifications for this fitment. A minimum 19″ wheel is required.

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