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2013-2015 Scion FR-S / Subaru BRZ HPS Radiator Hose Kit DIY Installation Guide

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Vehicle Application: 13-14 Scion FR-S / Subaru BRZ

Product Type: HPS Performance Silicone Radiator Hose kit

HPS Part Numbers:
57-1226-BLK (Black)
57-1226-BLUE (Blue)
57-1226-RED (Red)

The installation can be a little involved, with needing to remove a few engine bay components, but it should not take too long to complete.

Estimated Install Time: 1.5 hours

Tools Needed:
- Ratchet
- 10mm socket
- 12mm socket
- 8mm wrench
- Flat-blade screwdriver
- Philip (cross) screwdriver
- Needle-nosed pliers
- Drain pan
- Funnel

Always remember to take precautions and use safety glasses and gloves when working on your car.



Begin by putting the car up on jack stands. Remove the under tray with the 10mm and 12mm sockets. There is an access panel covering the coolant drain plug on the passenger side of the vehicle, which can be removed with a flat-blade screwdriver.



Make sure the engine and coolant are completely cooled down before draining the coolant. With the panel removed, the drain plug should be visible.



You can remove the radiator cap to let the coolant drain faster. We attached a piece of hose to the drain to avoid coolant splashing everywhere.



To get to the lower radiator hose, you will need to remove the air box. Loosen the hose clamp securing the air box to the intake hose, then unplug the MAF sensor. Lastly, remove the three 10mm bolts that secure the air box.



Loosen the hose clamps by using the needle-nosed pliers to pinch and move them back. We had to use a hose pick to break the hose loose at the engine side.



With the air box removed, you can see the lower radiator hose from the top of the engine bay.



After the under tray is removed, you can see the lower radiator hose.



We removed the two upper radiator hoses as one piece to install the HPS hoses easier. You will need to unbolt the filler neck with the two 10mm bolts.



Once the complete upper hose assembly is out, you can swap the filler neck to the HPS radiator hoses, and secure with the provided HPS Stainless Steel hose clamps.



The upper radiator hose at the radiator is a little tricky to secure. We had to use a swivel with the 8mm socket to tighten the clamp. You can also use an 8mm open-end wrench as well.



Re-install the filler neck, and double check the hoses to make sure they are not kinked or rubbing.



The lower hose went on pretty easily, and you can use the flat-blade screwdriver to tighten the HPS hose clamp.



Make sure all of the hoses and clamps are secured and tightened (including the drain plug), before refilling the cooling system.



There is a Philips (cross-head) bleed screw located on the heater hose at the firewall to bleed air from the system. Once the coolant is full, start the car and turn the heater to max heat (to open the thermostat), and let it idle for a few minutes. Once the car has reached it's operating temperature, turn the car off and let it cool down again before rechecking the coolant level. Add coolant if needed.



A full radiator + heater hose kit is also available for the FR-S / BRZ here:

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