340 LPH Fuel Pump and Fitting Kit for LS Engine Fuel Systems
When installing an LS engine into a 1991 to 2005 GM chassis the plumbing side of the conversion often proves the greatest hurdle and this 340 LPH Fuel Pump and Fitting Kit was built to clear that obstacle. Included adapters fit both return and returnless fuel rails while the drop in bracket secures the pump at the factory mounting point. Stainless steel fittings and a calibrated outlet port hold pressure up to 60 psi and resist cavitation under sustained throttle. Finally a plug and play wiring harness uses an OEM style connector to preserve system integrity and reduce installation time.
Factory-Location Bracket Ensuring Secure Pump Mounting
The custom bracket included in this kit is engineered to align precisely with the factory pump mounting point on 1991-2005 GM chassis, eliminating the need for drilling or trimming. Its form-lock design maintains correct positioning under vibration, which is critical for sustained pump life and consistent fuel delivery. By preserving the original mounting holes and flange geometry, the bracket helps maintain chassis integrity and prevents misalignment that can lead to premature wear. Installers benefit from a straightforward fit that drops directly into place, reducing labor time and avoiding potential clearance issues.
Adaptive Fittings for Both Return and Returnless Rails
This kit includes a set of precision-machined adapters to support both return and returnless LS fuel rail configurations, making it versatile across a wide range of applications. Each adapter features a high-tolerance O-ring seal that resists leaks under pressure and thermal cycling. The dual-rail compatibility allows shops and home builders to swap between systems without fabricating custom hard lines, cutting installation complexity. As a result, you can standardize plumbing procedures and minimize downtime regardless of your chosen fuel rail style.
Stainless Steel Fittings with Calibrated Outlet Port
All fittings in this assembly are constructed from premium stainless steel, providing excellent resistance to corrosion from ethanol blends and road salt. The calibrated outlet port is engineered to maintain up to 60 psi of backpressure, which prevents cavitation under heavy throttle and ensures stable pump operation. Consistent pressure right at the pump outlet reduces vapor lock risks during sustained high-load conditions. Together, these features deliver reliable performance and longevity even in extreme-driving environments.
Plug-and-play Wiring Harness for Rapid Electrical Integration
The included plug-and-play wiring harness terminates in an OEM style connector, preserving factory wiring integrity and environmental sealing. Heavy-gauge wiring and an integrated fuse holder ensure proper current delivery and circuit protection without splicing into the main harness. This harness design not only cuts installation time but also reduces the chance of troubleshooting error codes caused by poor electrical connections. Technicians appreciate the clean routing and compatibility with stock ECU triggers, making it simple to integrate the pump into the vehicle's existing control system.
Designed for precise fit and consistent performance in LS engine swaps.