Here is the HPS Black Silicone Radiator + Heater Hose Kit For 03 Subaru Impreza 2.5L Non Turbo, listed with the specifications that actually decide whether it fits.

Clamp choice matters: constant tension or lined clamps protect the hose surface over heat cycles. Keep petroleum away from standard silicone unless the hose is lined for it.
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At a glance
- Engine: 2.5L
- Material: Silicone
- Finish: Black
- Category: Hose Kits
- Price: $192.43 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
HPS black high temp 3-ply reinforced silicone radiator and heater hose kit (part number 57-1732-BLK) replaces 2003 Subaru Impreza 2.5L Non Turbo Left Hand Drive stock OEM rubber upper and lower radiator hoses and heater coolant hoses with premium grade high-heat resistance material which meets or exceeds OE specifications (Maximum temperature rating: 350F). Compared to the local auto parts store universal hoses, HPS silicone radiator and heater hose kit has all the correct bends and curves for a perfect fitment. HPS silicone coolant hose kit includes 100% stainless steel non-perforated embossed hose clamps for easy installation, which do not cut thru the silicone hoses.
HPS silicone hoses can prevent and fix the coolant leaking and engine over heating problem caused by cracked, damaged or collapsed OEM rubber coolant hoses. Excellent for extreme ambient and radiant temperature conditions, HPS silicone hoses can withstand the harsh high temperature and high pressure operating conditions of the engine yet still maintaining peak efficiency during daily driving or racing competition. HPS silicone hose kit is backed by HPS Performance Products limited lifetime warranty.
- Made with correct bends and curves for perfect fitment. Vehicle Application: 2003 Subaru Impreza 2.5L Non Turbo Left Hand Drive
- Prevent and fix the coolant leaking and engine over heating problem caused by cracked, damaged or collapsed OEM rubber coolant radiator heater hoses.
- Race proven design with long lasting quality and engineered for extremely high temperature service (Max. 350F) and prolonged exposure to under-hood and coolant heat.
- Includes 100% stainless steel industrial grade embossed hose clamps which would not cut through the silicone hoses.
- HPS silicone hose kit is backed by HPS Performance Products limited lifetime warranty.
Application:
For 2003 Subaru Impreza 2.5L Non Turbo
Remark:
Installation: Silicone hose water permeation rate is 10 to 15 times greater than standard EPDM rubber hose. Checking water level regularly is highly recommended when silicone coolant hoses are used in a daily driving vehicle.
Product Content:
- 1 Set x Radiator Hose Kit & 1 Set Heater Hose Kit
Hardware if Any is Shown in the Picture Above
The product does not come with manual/instruction, Professional Install Recommended
Cross Reference Number:
- 57-1732-BLK, 57-1732, 571732BLK
Our fitment desk exists precisely for the listings where the specification is easy to misread.
Also worth a look: Hoses & Fittings · HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 01-05 Mazda Miata 1.8L Non Turbo (NB2) · HPS Red Silicone Radiator Hose Kit For 99-01 Jeep Cherokee 4.0L (XJ) Right Hand Drive · full catalog
Parcels leave our USA warehouse promptly and arrive protected, because packaging failures are returns waiting to happen.
Background reading that is not trying to sell you anything: the NHTSA vehicle safety hub.
Questions we get about this part
How do I know this is the right part?
Send your VIN or your year, make and model and our fitment desk confirms the part against manufacturer data before it ships. The check is free and usually answered the same business day.
When will my order dispatch?
Your tracking link arrives by email at label creation and stays live until delivery, so you can follow the parcel the whole way.
Is there a warranty on this?
Returns are handled in one reply for most cases. Keep your order confirmation, since it is the only proof of purchase we need.
What happens before my order ships?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
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