Boundary BP-S1 Assembled Oil Pump with Billet Gears for Mazda BP Engine

Boundary

<h3>About Boundary Racing Pumps</h3><p><strong>Boundary Racing Pumps</strong> was founded in 2003 with a singular mission: build the finest lubrication systems the automotive racing industry has ever seen. Based in Royse City, Texas, Boundary set out as early as 2004 to understand and master the complexities of manufacturing high-performance gear pumps. By 2005, the company unveiled its first line of gear products — components that quickly earned a reputation for uncompromising quality in the performance community.</p><p>The philosophy behind every Boundary product starts with a well-known flaw in factory engineering. OEM oil pump gears are produced using a sintering process, where powdered steel is compressed and heated into shape. While cost-efficient for stock applications, sintered steel tops out at roughly 6,000 PSI of yield strength — a margin that disappears quickly when boost is added, RPM limits are raised, or an engine is pushed hard on a track. Boundary solves this problem by starting with solid billet steel, machining every tooth in-house, and applying their proprietary <strong>MartenWear</strong> heat treatment technology — a second-stage surface hardening process developed in collaboration with metallurgists that brings surface hardness to a Rockwell C rating of 55 to 60. The result is a pump gear with a yield strength approaching 110,000 PSI, roughly 18 times stronger than a stock OEM component.</p><p>Every pump that leaves Boundary&apos;s facility is validated on an in-house flow bench, with designs proven at speeds up to 12,000 RPM before ever shipping. Two U.S. patents protect their gerotor and dual-rotor designs — flow technology that represents genuine innovation in oil pump engineering. Products are backed by a <strong>lifetime warranty</strong> that is transferable to subsequent owners, a reflection of the confidence Boundary has in the durability of its billet construction.</p><p>Boundary&apos;s <a href="/15809-boundary-oil-pumps-201282">Oil Pumps</a> and <a href="/5564-engine-oil-pump-boundary-15809">Engine Oil Pumps</a> cover an impressive range of platforms, including the Ford 5.0 Coyote, 5.2 Voodoo, 5.2L Predator, 4.6 and 5.4 Modular motors, 7.3L Godzilla, EcoBoost family, GM Ecotec, and more. Complementing these are precision-machined <a href="/15809-boundary-engine-timing-sprocket-5760">Engine Timing Sprockets</a> and <a href="/10446-engine-timing-crankshaft-sprocket-boundary-15809">Engine Timing Crankshaft Sprockets</a> — components that complete a proper lubrication and valvetrain upgrade. A range of specialized <a href="/15809-boundary-engine-hardware-201285">Engine Hardware</a> rounds out the catalog, giving builders everything they need for a comprehensive engine build.</p><p>All Boundary gear sets are designed and manufactured entirely in the United States without outsourcing machining or design work. For any engine making more power than it left the factory with — or for any build that will see sustained high-RPM use — Boundary Racing Pumps represents one of the most impactful upgrades an engine builder can make.</p>