# CSF 08-15 Subaru Impreza WRX/STI 1-Row 31mm High-Performance Aluminum Radiator

CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your WRX/STI running at its best, a CSF High-Performance All-Aluminum Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must-have for both high horsepower builds as well as race vehicles which need added cooling performance in motorsports environments. This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes - producing the efficiency of two smaller tubes vs. one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.

-   Core Featured Ultra Efficient 6.5mm Tall Fins with a Multi-Louvered Design for Maximum Surface Area Contact
-   High-Performance Core Features CSF's Exclusive B-Tube Technology
-   Innovative "Multi-Fit" Combo Pipe and Plug Design, Included
-   True "Drop-in Fit" Requires No Modifications to Install
-   100% All-Aluminum TIG-Welded Construction
-   Individually Leak and Pressure Tested
-   1 Hour "Mirror Finish" Hand Polish
-   CNC Machined Mounting Brackets
-   For Manual Transmission Only
-   Supersedes CSF #7028

This Part Fits:

Year

Make

Model

Submodel

2016-2017

Subaru

Crosstrek

Base

2016

Subaru

Crosstrek

Hybrid

2016

Subaru

Crosstrek

Hybrid Touring

2016-2017

Subaru

Crosstrek

Limited

2016-2017

Subaru

Crosstrek

Premium

2009-2013

Subaru

Forester

X

2009-2013

Subaru

Forester

X Premium

2012-2016

Subaru

Impreza

Base

2012-2016

Subaru

Impreza

Limited

2012-2016

Subaru

Impreza

Premium

2012-2016

Subaru

Impreza

Sport Limited

2012-2016

Subaru

Impreza

Sport Premium

2008-2014

Subaru

Impreza

WRX

2008-2014

Subaru

Impreza

WRX STI

2006-2009

Subaru

Legacy

2.5i

2005-2006

Subaru

Legacy

GT

2005,2007-2009

Subaru

Legacy

GT Limited

2006-2009

Subaru

Legacy

GT spec.B

2005

Subaru

Legacy

i

2005

Subaru

Legacy

Limited

2006-2009

Subaru

Outback

2.5i

2007

Subaru

Outback

2.5i Basic

2006

Subaru

Outback

2.5i Limited

2008

Subaru

Outback

Base

2005

Subaru

Outback

i

2005

Subaru

Outback

Limited

2005-2006

Subaru

Outback

XT

2005-2009

Subaru

Outback

XT Limited

2015-2021

Subaru

WRX

Base

2015-2021

Subaru

WRX

Limited

2015-2021

Subaru

WRX

Premium

2015-2021

Subaru

WRX STI

Base

2015

Subaru

WRX STI

Launch Edition

2015-2021

Subaru

WRX STI

Limited

2019

Subaru

WRX STI

S209

2016

Subaru

WRX STI

Series.HyperBlue

2018

Subaru

WRX STI

Type RA

## Details

- **Price:** 611.15 CAD
- **Vendor:** CSF
- **Type:** Radiators

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 611.15 CAD | In stock |

## Images

- Photo - Primary
- Photo - Close Up
- Photo - Close Up
- Features and Benefits
- Features and Benefits
- Photo - out of package
- Photo - out of package
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/csf-08-15-subaru-impreza-wrx-sti-1-row-31mm-high-performance-aluminum-radiator)
> Updated: 2026-07-05