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Evil Energy FAQ

EVIL ENERGY buying guide: fuel systems, AN fittings and performance auto parts

EVIL ENERGY specializes in automotive fuel system modification and maintenance parts, with product categories such as AN fittings, fuel line kits, oil catch cans, fuel pumps, radiators, fuel cells, carburetor parts, exhaust parts, cooling components and accessories. The right purchase depends on line size, fluid compatibility, pressure needs, engine bay space, fitting angle and whether the part is for daily driving, LS swap work, EFI upgrades, carburetor setups or track/off-road projects.

AN fittings
Fuel line kits
Oil catch cans
Fuel pumps
Cooling system
Exhaust parts

EVIL ENERGY category comparison

CategoryBest forCommon optionsWhat to check before buying
AN fittings and adaptersCustom fuel, oil, coolant, breather and performance plumbing projects.Swivel fittings, weld-on fittings, AN to ORB adapters, angled fittings, reducers and couplers.Match AN size, thread type, seal style, fitting angle and hose type. AN and NPT/ORB are not interchangeable without the correct adapter.
Fuel hose and line kitsLS swaps, EFI conversions, carburetor setups, fuel cell routing and engine bay customization.CPE fuel line kits, PTFE fuel line kits, nylon braided hose, stainless braided hose and fuel line fittings.Confirm fuel type, pressure rating, bend radius, length, hose ID and whether the line is compatible with E85 or other fuels you use.
Oil catch cansPCV/CCV vapor separation, engine bay cleanup and oil vapor management.300ml baffled cans, 750ml kits, 1L/2L/3L breather tanks, drain valves, filters and AN line kits.Check installation space, hose routing, drain access, can capacity, port size and whether your setup should be vented or sealed.
Fuel pumps and fuel system partsHigh-flow EFI builds, modified engines, fuel cell setups and performance upgrades.External electric fuel pumps, fuel filters, check valves, regulators, fuel rails and line kits.Confirm flow rate, pressure, voltage, regulator needs, wiring, filter placement and compatibility with the engine’s fuel demand.
Radiators and cooling partsDaily driving, performance upgrades, higher-heat use and engine cooling refreshes.Radiators, cooling system components, overflow tanks, coolant tanks and related hoses.Measure mounting space, inlet/outlet location, fan clearance, hose size and coolant capacity before ordering.
Exhaust and fabrication partsCustom exhaust routing, turbo projects, V-band connections and performance fabrication.V-band clamps, exhaust components, piping-related parts and universal fabrication pieces.Check diameter, material, flange style, clearance, heat management and whether welding is required.

How to choose the right EVIL ENERGY parts

1

Start with the system, not the color.
Black, red or braided parts can make an engine bay look cleaner, but compatibility comes first: fuel type, pressure, thread type, hose size and sealing method matter more than appearance.
2

Choose CPE or PTFE by fluid and pressure needs.
CPE hose is flexible and cost-effective for many daily and performance setups. PTFE is usually preferred when chemical compatibility, vapor resistance or aggressive fuel use is the priority.
3

Size the oil catch can by engine bay space and maintenance habits.
A 300ml can is compact, while 750ml, 1L, 2L and 3L setups add capacity. Larger does not automatically mean better if it is hard to mount, drain or route cleanly.
4

Use angled fittings to prevent bad hose routing.
0°, 45°, 90° and swivel options help avoid kinks, sharp bends and tension on ports. A cleaner route is often safer than forcing a straight fitting into a tight bay.

AN size planning guide

This is a practical planning guide, not a universal rule. Always match the part to the engine build, pressure, flow requirement and manufacturer specifications.

4AN

Small lines, compact auxiliary routing, light fluid transfer
6AN

Common fuel line size for many EFI and carb setups
8AN

Higher-flow fuel, oil or coolant routing where space allows
10AN

Breather, catch can, large fuel/oil lines and performance builds
12AN+

Large-volume systems, cooling, racing or custom fabrication

Fitment and safety checklist

✓
Confirm thread type before tightening: AN, NPT, ORB and metric fittings seal differently. Forcing the wrong thread can damage parts or cause leaks.
✓
Pressure test fuel work: after installing fuel lines, pumps, filters or regulators, inspect for leaks before driving and re-check after heat cycles.
✓
Protect hoses from heat and abrasion: keep lines away from headers, belts, pulleys, sharp edges and moving suspension or steering components.
✓
Use professional help for critical systems: fuel, brake, oil and cooling modifications can create fire, failure or overheating risk if installed incorrectly.

Useful buying notes

Oil catch can capacity

EVIL ENERGY offers compact 300ml catch cans and larger 750ml, 1L, 2L and 3L breather or catch can options. Choose capacity based on crankcase vapor volume, service interval, mount location and how easy the can is to drain.

Fuel line kit vs individual fittings

A kit is easier when you want hose, swivel ends and adapters together for a common routing project. Individual fittings are better when the build already has specific hose lengths, port sizes and angle requirements.

Returns and shipping

EVIL ENERGY lists 30-day return contact timing for many situations. Wrong-item or change-of-mind returns generally require unused items in original packaging, while quality issues may require pictures or videos for review.

FAQ

What does EVIL ENERGY sell?

EVIL ENERGY sells aftermarket auto parts such as AN fittings, fuel line kits, oil catch cans, fuel pumps, radiators, carburetor parts, fuel cells, cooling system parts, exhaust components and performance accessories.

What is EVIL ENERGY best known for?

The brand is especially known for fuel system modification parts, AN fittings, fuel hose kits and oil catch can kits used in custom engine bay, LS swap, EFI and performance projects.

What size EVIL ENERGY fuel line should I choose?

Fuel line size depends on fuel demand, pump flow, pressure, engine power target and fuel type. 6AN is common in many fuel systems, while 8AN or larger may be used for higher-flow builds. Always match the full system, not just one part.

What is the difference between CPE and PTFE fuel hose?

CPE hose is flexible and cost-effective for many daily and performance applications. PTFE hose is usually chosen when chemical compatibility, fuel vapor resistance or aggressive fuel use is a higher priority.

Can I return EVIL ENERGY parts?

EVIL ENERGY asks customers to email support within 30 days of purchase for many return situations. Items should generally be unused and in original packaging, and return shipping responsibility depends on the reason for return.

Should EVIL ENERGY fuel system parts be professionally installed?

Professional installation is recommended for fuel, oil, cooling and other critical systems if the buyer is not experienced. Incorrect installation can cause leaks, fire risk, overheating or engine damage.