jasperautopart
Cylinder 4 Coolant Mod Cooling Hose Kit Replacement for Subaru WRX/STI/LGT/FXT EJ
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Highlights
- 【Applicable Model】：For DOHC EJ20 / EJ25 engines.(Fit all EJ20 / EJ25 engines 4 cylinder years and models except 2010+ LGT). For 02-14 Subaru WRX; For 04-on Subaru STI; For 04-08 Subaru Forester XT; For 05-09 Subaru Legacy GT.
- 【Features】: Increase coolant flow; reduce knock/detonation/cylinder temps/EGT delta; Improving overall cooling system performance.
- 【Quality Assurance】: High quality Cooling pipe and connectors, Perfect Fitment, definately No Leakage.
- 【Material】: T Fitting and Connectors are Made of high quality CNC Machined Out Of 6061 Billet Aluminum; and High quality rubber cooling Hose.
- 【Component】: 1x Engine Cooling Mod Hose Kit as Pictured
- 【Customer Service】: 1 year product quality warranty. Please get in touch with us at any time if the product has any quality issues, such as damage or vehicle fitment.
Why You'll Love It
- Increases coolant circulation to reduce cylinder temperatures, detonation, and knock on EJ engines
- Balances exhaust gas temperature differences to improve overall cooling system performance
- Durable CNC-machined 6061 billet aluminum T-fitting and connectors resist leaks
- Tough rubber hose provides a reliable coolant pathway for your engine bay
- Backed by a one-year warranty covering damage and vehicle fitment issues
Pros
- +CNC-machined 6061 billet aluminum fittings
- +Reduces cylinder temps and knock
- +Fits most DOHC EJ20 and EJ25 engines
- +Includes one-year quality warranty
Cons
- -Incompatible with 2010 and newer Legacy GT
- -Installation instructions are not listed
Detailed Review
The jasperautopart Cylinder 4 Coolant Mod Cooling Hose Kit is designed for Subaru owners looking to improve thermal management on their DOHC EJ engines. By routing additional coolant, this modification targets localized heat buildup to help reduce cylinder temperatures, detonation, knock, and exhaust gas temperature deltas across the engine.
Hardware quality is central to this kit, which includes a rubber cooling hose paired with a T-fitting and connectors CNC-machined out of 6061 billet aluminum. These solid metal fittings provide a dependable, leak-free connection designed to fit neatly into the existing engine bay layout.
Vehicle compatibility is broad across 4-cylinder DOHC EJ20 and EJ25 platforms, fitting 2002-2014 WRX, 2004-on STI, 2004-2008 Forester XT, and 2005-2009 Legacy GT models. However, it will not fit 2010 or newer Legacy GT models, and the listing does not include step-by-step installation instructions or extra mounting clamps.
Verdict: This cooling kit is a practical, well-machined upgrade for Subaru EJ engine owners wanting to reduce knock risks and cylinder temperatures. It is an ideal fit if you drive a compatible WRX, STI, FXT, or pre-2010 LGT and want the backing of a one-year warranty.
Who Should Buy It
A great fit if you:
- Drive a compatible 2002-2014 Subaru WRX or 2004-on STI
- Own a 2004-2008 Forester XT or 2005-2009 Legacy GT with a DOHC EJ engine
- Want to balance EGT deltas and reduce cylinder temperatures and knock
- Prefer durable 6061 billet aluminum fittings over plastic connectors
Consider something else if you:
- Drive a 2010 or newer Subaru Legacy GT
- Have an engine other than a 4-cylinder DOHC EJ20 or EJ25
FAQ
Which vehicles are compatible with this kit?
It fits 4-cylinder DOHC EJ20 and EJ25 engines, specifically 2002-2014 Subaru WRX, 2004 and newer Subaru STI, 2004-2008 Subaru Forester XT, and 2005-2009 Subaru Legacy GT models. It does not fit 2010+ Legacy GT models.
What materials are used to build this kit?
The kit features a high-quality rubber cooling hose alongside a T-fitting and connectors CNC-machined from 6061 billet aluminum.
Does this product come with a warranty?
Yes, it includes a 1-year product quality warranty that covers damage, vehicle fitment problems, and other quality issues.
Photos
Product Specs
| Specification | Details |
|---|---|
| Item Weight | 7.52 ounces |
| Item Length | 12 inches |
| Material Type | Aluminum |
| Color | Black |
| Brand Name | jasperautopart |
| Manufacturer | Jasperautopart |
| Unit Count | 1 Count |
| Manufacturer Warranty Description | 1 Year Warranty |
| Included Components | 1X Cylinder 4 Coolant Mod; 1X T Fitting; 2X Clamps |
| Best Sellers Rank | #84,995 in Automotive (See Top 100 in Automotive) #33 in Automotive Replacement Engine Cooler Accessories |
| ASIN | B0DHP4PWS9 |
| Customer Reviews | 4.5 4.5 out of 5 stars (32) 4.5 out of 5 stars |
| Brand | jasperautopart |
| Material | Aluminum |
| Number of Packs | 1 |
| Set Name | Engine Cooling Mod Hose Kit (1 Piece) |
| Specific Uses For Product | Replacement and maintenance of cooling system in Subaru WRX, STI, Forester XT, and Legacy GT models |
