DS Pump Tri-Lobe RHS GM LS 4-Stage

The DS Pump Tri-Lobe RHS GM LS 4-Stage from MOROSO is a high-performance dry-sump oil pump engineered for serious LS engine builders and track enthusiasts who demand maximum oil delivery and scavenging efficiency. This tri-lobe gear design is specifically built for right-hand-side (RHS) mounting on GM LS platforms, making it an essential upgrade for boosted applications, race engines, and high-RPM builds where stock wet-sump systems fall short. Whether you're building a dedicated race motor or upgrading a street performance engine, this four-stage scavenging pump ensures consistent oil supply under extreme conditions.

Tri-lobe pump designs deliver superior flow rates compared to traditional gear pumps, with the four-stage configuration optimizing both pressure and scavenge functions simultaneously. The RHS orientation allows seamless integration into dry-sump installations without requiring custom fabrication or adapter plates, while the robust construction handles the demands of turbocharged, supercharged, and naturally aspirated LS engines alike. MOROSO's engineering ensures reliable positive displacement across the full RPM band, preventing cavitation and oil starvation—critical factors that separate quality dry-sump systems from marginal setups that fail under sustained boost or lateral G-forces.

This pump is purpose-built for LS engine applications—LS1, LS2, LS3, LS7, and generation-V variants—where it pairs with complete dry-sump tank assemblies and external pressure/scavenge lines. Competition teams, engine shops, and dedicated enthusiasts rely on this component during high-g cornering, sustained wide-open throttle, and high-altitude track days where traditional lubrication systems can't keep up. Proper installation requires coordination with your dry-sump kit and verification that your mounting location accommodates the pump's footprint; consult your system's installation guide or speak with your engine builder to confirm fitment before purchase.