Stoptech 128.44184L Disc Brake Rotor - Front Left

StopTech Front Left Sport Rotor Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor, part number 128.44184L, is a direct replacement front left rotor for factory brake systems using stock calipers. It is built for Lexus applications that need a 334mm front disc with improved heat management, cleaner pad contact, and consistent braking feel.

For Lexus IS300, IS350, RC300, RC350, GS350, GS300, RC200t, IS200t, and GS450h fitments, this rotor combines a vented, cross-drilled design with a coated hat finish and black e-coating for corrosion resistance. The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on OE-style replacement fitment with performance-oriented surface design and durable metallurgy in most applications.

Key Features

• Direct replacement disc brake rotor for factory brake systems and stock calipers
• Cross-drilled surface helps disperse heat and brake dust
• Drilled pattern helps reduce pad glazing and improve initial bite
• Black e-coating and coated hat finish help resist corrosion
• High carbon metallurgy in most applications for quieter operation and improved crack resistance
• Vented rotor design with curved vane style for thermal control
• Front left position for confirmed Lexus applications
• Part number 128.44184L for application matching and catalog lookup

Detailed Description

StopTech 128.44184L is a 1-piece vented front left brake rotor with an outside diameter of 334 mm, a 5-lug bolt pattern, and a floating disc mounting design. It measures 30.0 mm nominal thickness and 27.0 mm discard thickness, with a 62.0 mm center hole diameter and curved internal vanes to support heat evacuation during repeated stops. The drilled surface is intended to improve wet and dry braking response while helping manage pad deposits and surface glazing.

This rotor is a strong match for Lexus owners looking for a front brake rotor upgrade that preserves factory fitment. It is listed for 2012-2022 Lexus IS350, 2016-2022 Lexus IS300, 2015-2022 Lexus RC350, 2020-2022 Lexus RC300, 2016-2020 Lexus GS350, 2018-2019 Lexus GS300, 2016-2017 Lexus RC200t, 2016 Lexus IS200t, 2013-2015 Lexus GS350, 2013-2015 Lexus GS450h, and 2012-2013 Lexus IS350. This part number, 128.44184L, is commonly searched by drivers needing a front left Lexus brake rotor with a 334mm disc and drilled surface.

What It Helps Address

• Brake fade during repeated stops
• Excess heat buildup in the front braking system
• Pad glazing and uneven pad surface transfer
• Corrosion on exposed rotor surfaces
• Reduced wet-weather braking response

Installation Notes

Install on the front left position only where the vehicle listing confirms a 334mm front disc and stock-caliper fitment. Verify rotor dimensions, hub fit, and brake package details before installation, especially on Lexus GS350 and GS300 applications with 4-piston front calipers and on 2016 Lexus IS200t models excluding the F Sport brake package. Always inspect pads, caliper condition, and rotor runout during brake service.

Quality Assurance

StopTech designs this rotor as a direct replacement for factory brake systems, with corrosion protection from black e-coating and improved durability from high carbon metallurgy in most applications. The drilled sport rotor construction is intended to support quieter operation, better crack resistance, and stable performance under everyday driving and spirited use.