ISR Performance 255 lph High-Flow Fuel Pump – Nissan 240SX (S13/S14)

Support your 240SX’s fuel demands with the ISR Performance 255 lph High-Flow Fuel Pump — a direct drop-in replacement fuel pump engineered for the Nissan 240SX (S13 and S14) that delivers 255 litres per hour of fuel flow capacity. Whether you’re running a modified KA24DE, a turbocharged SR20DET swap, or building toward higher power levels, the ISR Performance 255 lph pump provides the fuel flow headroom your build needs — in a direct OEM-fit package that installs without modification.

Key Features:

• 255 lph flow rate — high-flow fuel pump capable of supporting significantly more power than the factory pump
• Direct drop-in fitment — OEM-fit replacement for the factory fuel pump; installs in the factory fuel pump assembly without modification
• Nissan 240SX specific — engineered for the S13 and S14 240SX fuel tank and pump assembly
• ISR Performance quality — engineered for performance and reliability in modified 240SX applications
• Supports engine swaps — 255 lph flow capacity supports SR20DET, KA24DE, and other common 240SX engine configurations at elevated power levels

Performance Benefits:

• Increased Fuel Flow Capacity: 255 lph flow rate provides significantly more fuel delivery capacity than the factory pump — supporting higher injector duty cycles and increased fuel demand at elevated power levels
• Consistent Fuel Pressure: High-flow pump maintains consistent fuel pressure under the sustained high-demand conditions of performance driving and track use — preventing the fuel pressure drop that causes lean conditions and power loss
• SR20DET Swap Support: 255 lph capacity is well-suited for turbocharged SR20DET builds running upgraded injectors at moderate to high boost levels
• KA24DE Performance Support: Supports modified KA24DE builds running larger injectors and increased fuel demand from forced induction or high-compression naturally aspirated builds
• Drop-In Convenience: Direct OEM-fit installation eliminates the complexity and cost of custom fuel pump mounting or fuel cell conversions

Specifications:

• Brand: ISR Performance
• Part Number: IS-FPN006
• Flow Rate: 255 lph (litres per hour)
• Fitment Type: Direct drop-in OEM replacement
• Application: Nissan 240SX S13 / S14

Fitment Information:

• 1989–1994 Nissan 240SX (S13) — KA24DE and SR20DET swap applications
• 1995–1998 Nissan 240SX (S14) — KA24DE and SR20DET swap applications
• Note: Verify your specific year and model before ordering. Direct drop-in fitment — no modification to the fuel pump assembly required.
• Installation: Professional installation recommended — fuel system work requires proper safety precautions
• Tune: An ECU tune is required if upgrading injectors simultaneously to match the increased fuel delivery capacity

What’s Included:

• ISR Performance 255 lph fuel pump (IS-FPN006)
• Installation instructions

Installation Notes:

• Professional installation recommended — fuel system work involves flammable fuel and pressurized lines
• Depressurize the fuel system before beginning installation
• Disconnect the battery before working on the fuel system
• Replace the fuel filter at the same time as the fuel pump for best results
• Inspect the fuel pump sock/strainer and replace if clogged or damaged
• Verify fuel pressure after installation with a fuel pressure gauge before starting the engine
• Check for fuel leaks after installation before returning the vehicle to service

Why Upgrade the 240SX Fuel Pump?

The factory Nissan 240SX fuel pump is rated for the stock engine’s fuel demands — adequate for a stock KA24DE but insufficient for modified builds running larger injectors, higher boost, or engine swaps with greater fuel requirements. As fuel pump flow capacity is exceeded, fuel pressure drops under high-demand conditions — causing lean air/fuel ratios that reduce power and, in severe cases, cause engine damage. The ISR Performance 255 lph pump provides the flow headroom needed to support modified 240SX builds reliably, ensuring consistent fuel pressure and delivery across the full operating range. Additionally, factory fuel pumps on 25–35 year old S13/S14 240SXs are often worn or weakened — a fresh high-flow pump is both a performance and reliability upgrade.

The S13/S14 240SX Platform:

The Nissan 240SX (S13 and S14) is one of the most popular and versatile Japanese sports car platforms in the enthusiast community — a lightweight, rear-wheel-drive chassis that has become a staple of drifting, time attack, and grassroots motorsport. The 240SX’s popularity as an SR20DET swap platform makes fuel system upgrades particularly important — the turbocharged SR20DET’s fuel demands at elevated boost levels quickly exceed the factory KA24DE fuel pump’s capacity. The ISR Performance 255 lph pump is a straightforward, cost-effective solution for any 240SX build requiring increased fuel delivery.

Why ISR Performance?

ISR Performance specializes in performance parts for popular Japanese sports car platforms — with a particular focus on the Nissan S-chassis community. Their product lineup is developed with the 240SX enthusiast in mind, providing performance-oriented components at accessible price points for a platform where budget-conscious builds are the norm.

Perfect For:

• 1989–1998 Nissan 240SX (S13/S14) builds running SR20DET swaps at moderate to high boost levels
• Modified KA24DE builds running larger injectors and increased fuel demand
• Any 240SX build where the factory fuel pump is limiting fuel delivery capacity
• S13/S14 owners replacing a worn or failing factory fuel pump with a high-flow upgrade
• Anyone building a reliable, performance-focused 240SX who wants fuel system headroom for future power upgrades

Pro Tip: Replace the fuel filter and fuel pump sock/strainer at the same time as the pump. A clogged filter or strainer will restrict flow to the new pump and prevent it from delivering its rated 255 lph — defeating the purpose of the upgrade.

Note: An ECU tune is required if upgrading injector size simultaneously. Always verify fuel system connections are leak-free and fuel pressure is correct before driving the vehicle.