High Performance Kit

Yes, and the main reason is compatibility. When you buy a complete fuel system kit from Evil Energy, every component is pre matched: the fuel pump flow rate is paired with the correct fuel pressure regulator range, the AN fittings match the fuel line size, and the fuel filter micron rating is positioned correctly for your pump. Buying parts individually often leads to mismatched thread sizes, wrong pressure ranges, or missing adapters that cost more in time and return shipping than the kit saves. Each performance kit includes the core fuel delivery components in one box, backed by a 1 year warranty and 180 day return policy.

The real cost question is whether your engine upgrade needs supporting modifications beyond what the kit covers. For most LS swap fuel system builds and EFI conversions, the kit handles 80 to 90 percent of the fuel system. The remaining 10 to 20 percent typically involves vehicle specific adapters, a relay and fuse for pump wiring, and a fuel pressure gauge for monitoring.

Start with three decisions:

• Engine type: For LS swap projects (Chevy 4.8L, 5.3L, 6.0L), choose a kit with a 58 PSI fuel pressure regulator and 300LPH inline fuel pump. For a 350 engine upgrade kit or 2jz engine upgrade kit build running boost, look for an EFI fuel system with a 20 to 120 PSI adjustable regulator. For carbureted engines, select a carburetor fuel system kit with a 5 to 12 PSI regulator.
• Fuel type: Gasoline works with CPE lines. E85, methanol, and ethanol require antistatic PTFE fuel line to prevent material degradation. Diesel is compatible with both CPE and PTFE.
• System layout: Most performance builds use a return style fuel system for better fuel cooling and consistent pressure. Returnless systems are simpler but can cause vapor lock in high heat. Check our return vs returnless guide for details.

If your project uses a fuel cell, match the tank capacity to your driving range. A 5 gallon cell suits drag racing, while 10 to 15 gallons works for street and drift builds.

Evil Energy performance kits use 6061 T6 aluminum fittings, stainless steel filter elements, and PTFE fuel lines rated to 3000 PSI working pressure. The 300LPH fuel pump is tested at 43 PSI and 13.5V. For fuel system reliability, three factors matter most:

• Vibration dampening on the pump mount. Bolting the pump directly to the frame transmits noise and vibration. Use a rubber isolator between the pump and mounting surface.
• Dual stage filtration. Run a 100 micron pre filter before the pump to protect it from debris, and a 10 micron post filter before the injectors to protect the engine. Skipping either filter shortens component life.
• E85 compatibility on every fuel contact component. If you run ethanol, verify that your pump, regulator, seals, O rings, and fittings are all E85 rated. Antistatic PTFE fuel line is required, not optional, for ethanol fuels.

The kits are built for daily driving and weekend track use. For dedicated race builds pushing extreme horsepower, additional supporting upgrades like high impedance injectors, upgraded fuel rails, and professional ECU tuning are recommended.

Each Evil Energy complete fuel system kit includes:

• High flow fuel pump (300LPH or 405LPH external inline)
• Fuel pressure regulator (adjustable, ranges from 20 to 120 PSI depending on kit)
• Inline fuel filter (10 micron, 30 micron, 40 micron, or 100 micron depending on configuration)
• Fuel line (20FT, 6AN, available in CPE, PTFE, or antistatic PTFE)
• AN fittings (90 degree and straight 6AN fittings, Y block on select kits)
• Mounting brackets for filter and pump
• Adapter fittings (M12 x 1.5 and M18 x 1.5 on PTFE configurations)

Fuel cell tank kits additionally include the aluminum tank with anti slosh foam, level sender, AN10 to AN6 reducer adapters, and dual filters (100 micron pre and 10 micron post).

What is typically not included that you may need:

• Relay, fuse, and wiring harness for pump electrical connection
• Fuel pressure gauge for dash or regulator monitoring
• Fuel injectors and fuel rails (engine specific, sold separately)
• Vehicle specific tank adapters or bulkhead fittings for your particular chassis
• PTFE hose end fittings in additional angles if your routing requires more than the included 90 degree and straight fittings

Always check the what is in the box section on each product page before ordering to confirm the exact parts list for your chosen configuration.

Installation difficulty depends on your experience with fuel system work and your build complexity. If you have assembled AN fittings, routed PTFE fuel line, and set EFI pressure before, the kits are designed for DIY installation.

Key installation steps:

• Mount the fuel pump near the tank, below the outlet level, to allow gravity feed. Keep it away from exhaust heat and moving parts.
• Install the pre filter (100 micron) before the pump and the post filter (10 micron) after the pump, before the regulator.
• Route the fuel line with gradual bends. Use 45 degree or 90 degree fittings instead of forcing sharp turns in PTFE hose.
• Set your base fuel pressure on the regulator according to your injector and ECU requirements.
• Verify pump voltage under load using a multimeter. Voltage drop reduces fuel flow.
• Check every fitting for leaks with the pump running before starting the engine.

Professional installation is recommended if your build involves custom tank modification, bulkhead fitting installation through body panels, ECU tuning for modified injector sizing, or electrical wiring that exceeds your experience. A mistake in fuel system assembly can cause leaks, fire risk, or engine damage, so when in doubt, consult a qualified mechanic.