Boundary FA20D 12mm MartenWear Billet Oil Pump Gear Set Subaru BRZ / Toyota 86 / Scion FR-S 2.0L | FA20D-12MM-OPG-M

The Boundary FA20D 12mm MartenWear Billet Oil Pump Gear Set is a high-performance replacement designed for the 2013–2020 Subaru BRZ, Scion FR-S, and Toyota 86 equipped with the 2.0L FA20D engine. Engineered for enthusiasts and racers who demand reliable oil pressure under high-RPM and high-load conditions, these billet gears are a direct upgrade over the factory OEM oil pump gears that are known to wear prematurely in performance applications. If you're building a track car, daily driver with aggressive mods, or simply want peace of mind knowing your lubrication system won't let you down, this is one of the most critical upgrades you can make to your FA20D engine.

Key Features & Benefits

• MartenWear Proprietary Surface Treatment – Boundary's exclusive MartenWear coating dramatically increases surface hardness and wear resistance compared to OEM gears, extending service life even under the most demanding track and performance conditions.
• 12mm Extended Width Gears – Wider than the stock gear set, the 12mm profile increases oil flow volume and helps maintain consistent oil pressure at high RPM, reducing the risk of oil starvation during spirited driving or on-track use.
• Billet Construction – CNC-machined from high-grade billet steel for superior dimensional accuracy and strength versus cast or sintered OEM-style components, ensuring a precise fit and long-term durability.
• Direct OEM Replacement Fitment – Designed as a drop-in upgrade for the factory FA20D oil pump housing; no modifications to the pump body or engine required.
• Proven in Performance Applications – Trusted by professional engine builders, tuners, and track-day enthusiasts who push FA20D-powered vehicles beyond stock limits.
• Addresses a Known FA20D Weakness – The stock oil pump gears are a documented failure point in modified or high-mileage FA20D engines. This upgrade directly resolves that vulnerability before catastrophic oil pressure loss occurs.