340 LPH Fuel Pump and Fitting Kit for LS Engines
When fitting an LS engine into 1991 through 2005 GM platforms most stock fuel systems cannot keep pace with throttle demands and that is where this 340 LPH Fuel Pump and Fitting Kit makes a difference. It includes a genuine Walbro 340 LPH pump paired with corrosion resistant anodized aluminum 3/8 inch 5/16 inch and 6AN fittings that connect to factory hardlines or aftermarket rails without cutting or splicing. A low profile bracket secures the pump at the tank outlet to minimize pressure drop under heavy load. Installers will appreciate plug in harness ends and simple hose terminations that speed up LS engine conversions.
Durable Anodized Aluminum Fittings for Leak Free Connections
Each fitting in this kit is precision machined from high grade aluminum before undergoing an advanced anodizing process that produces a dense oxide layer resisting corrosion from ethanol blends and road salt. By matching factory dimensions for 3/8 inch, 5/16 inch and 6AN ports, these connectors attach to stock hardlines or aftermarket rails without cutting or splicing. The conversion finish hardens the metal surface to prevent pitting over engine hours, and its thermal stability holds tolerances steady during hot soak and cold start cycles. This combination of material strength and coating integrity safeguards a leak free seal under every operating condition.
Low Profile Bracket Design for Consistent Fuel Pressure
The compact mounting bracket secures the pump assembly directly at the tank outlet flange, shortening the fuel feed path and minimizing pressure drop under heavy throttle. Its form aligns with existing GM chassis mounting points, allowing installers to reuse stock hardware without drilling or modifying frame rails. Firmly holding the pump in place prevents vibration that can fatigue hoses and fittings, while the slim outline preserves underbody clearance for steering and exhaust components. This purposeful design maintains a constant supply of fuel even during hard acceleration or cornering.
Genuine Walbro 340 LPH Pump Performance Under Extreme Demand
At the heart of the kit is the authentic Walbro 340 LPH unit, engineered to support high output LS engines without hesitation. Its internal gerotor mechanism delivers a steady flow rate up to the rated capacity, preventing cavitation during rapid throttle changes or sustained high rpm operation. The pump housing uses reinforced composite materials to resist degradation from modern fuels, and precision machining keeps internal tolerances tight for stable pressure even at low tank levels. Positioned at the outlet, the unit benefits from both gravity feed and cooling through fluid residence, extending service life and reducing heat soak risks.
Plug In Harness and Simple Hose Connections for Rapid Installation
Every electrical lead terminates in a factory compatible connector that mates directly with GM LS and LT wiring harnesses, eliminating wire cutting, crimping or soldering. Fuel hoses slip over barbed fittings sized to common diameters, and standard clamp style collars secure each line using basic hand tools. This intuitive plumbing and wiring scheme cuts installation time, reduces error potential, and ensures a tidy underbody appearance. Technicians can quickly trace circuits and hose runs, simplifying troubleshooting and providing reliable fuel delivery from day one.
To complete your setup with the same gas tank but with a smaller capacity pump at 255 LPH see our 1967-1972 Chevy Truck Frame Mount Gas Tank - Side Fill - 255 LPH Pump.