Cooling, Vacuum & Transmission

Keep your engine's supporting fluid systems running cool, sealed, and leak-free. This collection covers three distinct hose types your engine bay depends on outside the fuel system — each built with a different material and pressure rating for a specific job, so picking the wrong one can mean swelling, collapsing, or premature failure.

Shop by Hose Type

  • Vacuum Hose: Silicone construction rated up to 130 PSI burst pressure, engineered to resist collapsing under negative pressure. Used for PCV lines, boost/vacuum routing, and emissions components. See our full Vacuum & Specialty Hoses range.
  • Heater & Radiator Hose: EPDM rubber built to SAE 20R3 Class D-2, rated to 100 PSI and up to 257°F, for stable coolant flow between the engine, radiator, and heater core. Browse more in Cooling & Transmission Hoses.
  • Transmission Oil Cooler Hose: CPE fiber-reinforced construction rated to SAE J1532 and up to 250 PSI, purpose-built for automatic transmission fluid (ATF). Unlike coolant hose, it resists swelling from petroleum-based fluids. Pair it with a Transmission Oil Cooler for a complete cooling setup.

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EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY[Straight,1PC]
EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black

Engineered for high-pressure, high-temperature fuel systems, the EVIL ENERGY PTFE Hose End Fitting delivers leak-proof performance for PTFE fuel lines in performance builds, LS swaps, boosted engines, and ethanol-based fuel setups. Made from 6061-T6 aluminum with a 360° swivel design, these AN fittings ensure a clean, secure, and easy-to-assemble connection—ideal for builders who demand durability and precision.

$8.99
$8.99
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[Black,Without Bracket] black inline evil energy fuel filter with directional arrow and multiple AN fuel line fittingsevil energy fuel filter kit with stainless steel inline fuel filter, AN fittings, and mounting hardware
EVIL ENERGY Inline Fuel Filter with 6AN 8AN 10AN Adapter and Bracket Universal 10/30/40/100 Micron - Black

[Application] Universal fuel filter, includes an6, an8, an10 adapters for different size applications. With mounting bracket keeps the engine bar stylish and clean.

  • [Material] Aluminum alloy fuel filter can and stainless steel filter element.
  • [O-ring] The o-ring provides a tight seal for fittings and end caps.
  • [Function] Can be used for filtering gasoline, diesel, etc. Captures contaminant particles of 10 micron and above to protect the fuel system of the vehicle.
  • [Feature] Removable design, easy to clean or replace filter element at regular time.
  • [Installation Tips] We have debugged the installation direction of the fuel filters before delivery. Please check and ensure the closed end of the filter element docks with the spring. Let the liquid flow following the arrow from the spring end to the other end, and the fuel filter will serve longer.
$23.99
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$24.99
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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

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[1 PC][2 PCS]
EVIL ENERGY AN Flare to AN ORB Male Fuel Rail Adapter Fitting
  • AN to ORB Conversion
    Converts AN flare fittings to ORB ports for fuel rails and aftermarket fuel components.
  • High Pressure Capability
    Rated up to 1500 PSI for reliable performance in fuel and oil systems.
  • Leak Free Sealing Design
    37 degree AN flare seal combined with ORB O ring ensures a secure, leak resistant connection.
  • CNC Machined Aluminum
    Made from 6061 T6 aluminum with black anodized finish for corrosion resistance.
  • Wide Size Availability
    Multiple AN sizes available to support custom fuel system layouts.
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  • EVIL ENERGY Vacuum Hose Tubing Line Silicone 130PSI Max PressureEVIL ENERGY Vacuum Hose Tubing Line Silicone 130PSI Max Pressure
    EVIL ENERGY Vacuum Hose Tubing Line Silicone 130PSI Max Pressure (1/4'' 1/8'' 3/8'' 3/16'' 5/16'' 5/32'' 7/32'' 7/64'') - Black
    Brand EVIL ENERGY Material Silicone Length 5FT/10FT/50FT Size 1/4'' ID:6mm (1/4").OD:12mm 1/8'' ID:3mm (1/8").OD:9mm 3/8'' ID:10mm (3/8").OD:16mm 3/16'' ID:5mm (3/16").OD:11mm 5/16'' ID:8mm (5/16").OD:14mm 5/32'' ID:4m (5/32").OD:10mm 7/32'' ID: 5.5mm (7/32"). OD: 11.5mm 7/64''  ID: 2.8mm (7/64"). OD: 8.8mm Nominal Wall Thickness 3 mm Working Pressure 43PSI Burst Pressure 100PSI(high temperature) 130PSI (room...
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  • [5FT][10FT]
    EVIL ENERGY Heater Hose Coolant Radiator Straight 100PSI SAE 20R3 (5/8,1/2,3/4,3/8,5/16,1 inch)

    The EVIL ENERGY Heater Hose is designed for high-temperature and high-pressure cooling system applications. Made from durable EPDM rubber and compliant with SAE 20R3 Class D-2, it delivers long-lasting flexibility and resistance to heat, ozone, and coolant chemicals.

    Rated for up to 100 PSI and -40°F to 257°F, this hose ensures stable flow and reliable performance in radiators, heater cores, and overflow tanks. Available in multiple ID sizes (5/16 inch to 1 inch) and lengths up to 25FT for universal installation across classic, performance, and heavy-duty engines.

    Ideal for those upgrading or restoring engine cooling systems, 454 big block builds, or custom EFI setups that demand consistent coolant circulation and long-term durability.

    $17.39
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    $46.50
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  • [5FT,Without clamps][10FT,Without clamps]
    EVIL ENERGY Transmission Oil Cooler Hose 250PSI SAE J1532 5/10/20FT

    Built for performance and durability, the EVIL ENERGY Transmission Oil Cooler Hose ensures a secure, heat-resistant connection for your automatic transmission or engine oil system. Made from premium CPE material reinforced with fiber, it withstands up to 250 PSI working pressure and extreme temperatures up to 257°F. Perfect for transmission cooler lines, hydraulic systems, and custom fuel setups that demand reliability under pressure.

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  • [5FT] EVIL ENERGY heater hose with clamps, 5FT coolant radiator hose. Image showing kit components: 5-foot EPDM hose and 5 clamps.[10FT] EVIL ENERGY heater hose with clamps, 10FT coolant radiator hose. Image showing kit components: 10FT EPDM hose and 10 clamps.
    EVIL ENERGY 3/8inch Heater Hose 5FT/10FT Coolant Radiator Hose With 5PCS Clamps Straight 100PSI SAE 20R3 Black
    This EVIL ENERGY Heater Hose With Clamps kit includes one 5-foot EPDM rubber hose and 5PCS Clamps. Designed for high-temperature fluid transfer, it is ideal for automotive heater systems, engine cooling systems, radiator return lines, and other similar applications. Perfect for routine maintenance or custom...
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FAQs about Cooling, Vacuum & Transmission

What's the difference between a vacuum hose, a heater hose, and a transmission cooler hose?

They're built for completely different jobs and aren't interchangeable.

Vacuum hose is designed to resist collapsing under negative pressure and typically only sees air or fuel vapor. Heater/radiator hose carries hot engine coolant and is rated for moderate pressure (around 100 PSI) and sustained heat.

Transmission cooler hose is built to handle high-pressure automatic transmission fluid (ATF) — it needs oil-resistant construction (like CPE) so it doesn't swell or come apart under hydraulic pressure.

Yes, on vehicles with vacuum-modulated automatic transmissions, a cracked, loose, or leaking vacuum line to the modulator can cause harsh or erratic shifting, delayed engagement, or fluid getting drawn into the engine's intake. Always inspect the vacuum hose connected to the modulator when diagnosing shifting problems before assuming the transmission itself has failed.

Match the inside diameter (ID) of your factory hose, most silicone vacuum lines run from 1/8" to 5/16", heater/radiator hoses commonly range from 5/16" to 1", and transmission cooler lines are typically 5/16" to 5/8". If you're unsure, measure the old hose or check your vehicle's service manual before ordering.

Yes. Our transmission cooler hose (250 PSI, SAE J1532 rated) is commonly used in LS swaps and custom transmission cooling setups, while the heater/radiator hose line is popular for engine cooling system restorations on classic and performance builds. Always verify the pressure and temperature rating against your application before installing. Pairing this hose with a dedicated transmission oil cooler will further improve cooling efficiency on high-load builds.

A cooling system naturally creates negative pressure (vacuum) as coolant contracts after the engine shuts off. Normally, the radiator cap's one-way valve equalizes this by letting coolant flow back from the overflow tank. If the cap or overflow hose is faulty, that vacuum has nowhere to go and pulls the radiator or heater hose inward, causing it to collapse.

A worn-out hose that's lost its structural integrity is also more likely to collapse under this vacuum. Replacing a soft, aged hose, along with checking the radiator cap, usually resolves the issue.

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