GiroDisc A1-171 2-Piece Slotted 340 mm Front Rotors for VW/Audi MQB

Vehicle Fitment

• Volkswagen Golf R Mk7 / Mk7.5 (with 340 mm front rotors)
• Volkswagen GTI (Mk7 with Performance Package, Mk8 w/ 340 mm front brakes)
• Audi S3 (8V, 2013-2020) - front axle 340 mm rotor variant
• Audi TT-S (8S) with 340 mm front brakes / other VW-Audi MQB-platform cars equipped with 340 mm rotor setup

Features

• 2-piece floating rotor design - cast-iron friction ring + 6061-T6 aluminum hat for reduced unsprung & rotational mass
• 340 mm slotted/vented disc with curved-vane internal ventilation - optimized for heat dissipation under high-load braking
• Floating-mount system with alloy steel drive pins + anti-noise spring washers - allows thermal expansion while preventing cold-start rattle
• Rotors ~20.3 lb each vs ~23.8 lb stock - reduction in rotational mass yields quicker throttle response and improved suspension feel under braking or cornering :contentReference[oaicite:1]{index=1}
• Direct-bolt replacement for OE discs - no modifications to calipers or hubs required :contentReference[oaicite:2]{index=2}
• Maintains factory brake bias and ABS compatibility - ideal for street, track, or spirited driving without full big-brake kit changes :contentReference[oaicite:3]{index=3}
• Replaceable disc rings - cost-effective long-term maintenance as you can swap rings when worn instead of full rotor replacement :contentReference[oaicite:4]{index=4}
• Enhanced braking performance: improved cooling, better pad bite, and more consistent braking under repeated hard stops or track conditions :contentReference[oaicite:5]{index=5}

Specifications

• Part Number: A1-171
• Rotor Diameter: 340 mm
• Construction: 2-piece floating rotor (cast-iron ring + 6061-T6 aluminum hat)
• Weight: ~20.3 lb each (vs ~23.8 lb stock) :contentReference[oaicite:6]{index=6}
• Ventilation: Curved-vane internal ventilation for efficient heat dissipation :contentReference[oaicite:7]{index=7}
• Floating-Mount Hardware: High-strength alloy steel drive pins + spring washers for thermal expansion and anti-rattle :contentReference[oaicite:8]{index=8}
• Slip-Fit: Direct bolt-on to OEM hubs and calipers - no adapters or spacers required :contentReference[oaicite:9]{index=9}
• Sold As: Pair (Left + Right) front rotors - floating rotor set

Included Components

• 2x Front rotors (left + right), 340 mm, 2-piece slotted design
• Floating-mount hardware (drive pins, spring washers, fasteners as required) for installation

Product Description

The GiroDisc A1-171 rotor set delivers a high-performance brake upgrade for VW/Audi MQB-platform vehicles equipped with 340 mm front rotors - including Golf R, GTI (with PP), Audi S3 (8V), TT-S (8S), and other compatible variants. By replacing the stock one-piece rotors with a two-piece, floating, slotted and vented design, A1-171 reduces both unsprung and rotational mass, resulting in quicker throttle response, improved suspension reaction under braking, and sharper handling feel - especially beneficial during spirited driving or track use.

The curved-vane internal ventilation and slotted rotor surface help dissipate heat efficiently and purge brake-pad gases or debris, enhancing brake performance and consistency under repeated hard stops. The floating mounting system not only allows thermal expansion during heavy use, but also suppresses cold-start rotor noise via anti-rattle spring washers - making this a practical upgrade for both street and track environments. Because these rotors bolt directly to OEM hubs and accept factory calipers and pads, there's no need for caliper upgrades or adapters. For VW/Audi owners wanting improved braking performance, reduced unsprung weight, and better pedal feel - without going to a full big-brake kit - GiroDisc A1-171 is a strong, bolt-on solution.