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Description
STI RADIATOR CAP For LEGACY OUTBACK (BP) ST4511355010Brand STI Product RADIATOR CAP Product Number ST4511355010 Description Opening valve pressure changed from 1. 1 bar (standard) to 1. 3 bar This product prevents overflow caused by the thermal expansion of coolant water even under severe conditions such as sports driving and circuit racing Opening valve pressure: .. 1. 3 bar. Compatible Vehicle LEGACY OUTBACK (BP) Compatible Models Model adaptation symbol: A 2003 year May 2004 04 May 2. 5i (AWD 4AT) 2.
| Brand |
STI
|
| Product |
RADIATOR CAP
|
| Product Number |
ST4511355010
|
| Description |
Opening valve pressure changed from 1.1 bar (standard) to 1.3 bar This product prevents overflow caused by the thermal expansion of coolant water even under severe conditions such as sports driving and circuit racing Opening valve pressure: .. 1.3 bar.
|
| Compatible Vehicle |
LEGACY OUTBACK (BP)
|
| Compatible Models |
Model adaptation symbol: A 2003-year May-2004 04 May 2.5i (AWD / 4AT) - 2.5i (AWD / 4AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - model adaptation symbol: B 2004 year 05 January to May 2005 2.5i (AWD / 4AT) - 2.5i (AWD / 4AT) - 2.5i LLBean (AWD / 4AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0R LLBean (AWD / 5AT) - model adaptation symbol: C 2005 year 06 January to May 2006 2.5i (AWD / 4AT) - 2.5i (AWD / 4AT) - 2.5i LLBean (AWD / 4AT) - 2.5i (AWD / 4AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0R LLBean (AWD / 5AT) - model adaptation symbol: D 04 May 2006 06 May and 2007 2.5i (AWD / 4AT) - 2.5i LLBean (AWD / 4AT) - 3.0R (AWD / 5AT) - 3.0R LLBean (AWD / 5AT) - model adaptation symbol: E 05 May 2007 - 2008 04 May 2.5i (AWD / 4AT) - 2.5i S-Style (AWD / 4AT) - 2.5i L-Style (AWD / 4AT) - 3.0R (AWD / 5AT) - 3.0R SI-CRUISE (AWD / 5AT) - model adaptation symbol: F 2008 Toshi 05 Monday to April 2009 2.5i (AWD / 4AT) - 2.5i SI-CRUISE (AWD / 4AT) - 2.5XT (AWD / 5AT) ___ 2.5XT ES (AWD / 5AT) ___ 3.0R ES (AWD / 5AT) -
|
| Remarks |
* When replacing this product, pay careful attention to leakage of water from the piping, and be sure to inspect the coolant water at the start of work. * The explanation of this product is for Japanese specification.
|
| Notes |
Product code change: ST45137ST001
Images are for illustration purpose only. Actual product may vary.
|
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4.4 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 4
Great filter, but doesn't fit 2013 Honda Fit without modification
Size: 8.3" x 9.3" x 1.3"
Right off the bat: I don't have any airflow problems with this filter. It works great, the air is noticeably cleaner, and airflow has not been meaningfully reduced. However, it doesn't fit my air filter holder very well.
The ' air filter holder' (a plastic tray that slides horizontally into the air flow system) has two plastic fringes on either side of the tray, which each have two small notches in them, a few inches apart from one another. This appears to act as a sort of 'key' by which you can gauge you are putting the filter in with the correct alignment. On an OEM filter, the slots line up with two strips of material that stretch across the length of the filter, which themselves rest within the slots. However, the slots don't line up with the strips on this filter. I had to cut the fringes so that the slots in them are wider, so the strips would fit in them. Without doing this, the filter wouldn't press down into the tray.
Having done that, and the filter now rests flush in the tray, there are still marginal gaps around the perimeter of the filter. It's a millimeter or two too small for the tray, so there is some airflow around the filter. This could be rectified by wrapping insulation tape or something around the edge of the filter, or could be ignored if you're not super picky. I haven't added any wrapping to get an airtight seal, and even with that gap I still noticed that the air is way better.
So ultimately, it didn't fit exactly, but it fits 90% of the way and, with some finagling, is a superior filter by any other measure.
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Reviewed in the United States on December 3, 2018
★★★★★ 5
Don't overlook this important bit of maintenance
Size: 8.3" x 9.3" x 1.3"
Cabin air filters get dirty and gross quicker than you realize. I recommend changing them twice a year. Bosch is a quality brand, very happy with it.
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Reviewed in the United States on March 8, 2026
★★★★★ 1
Better than Honda Cabin Filter for Allergies -
Size: 8.3" x 9.3" x 1.3"
Installation took all of 3 minutes.
Noticeable improvement in air quality (less allergy response) since installation. Others mentioned a reduction in air flow but have not noticed a change.
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Update (9/2020)
Noticeable reduction in air flow. I have needed to increase the fan speed to make the cabin comfortable. I may be switching brands soon. I will pull the filter at 6 weeks and see if it is getting plugged (yikes).
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Update (10/2020)
I pulled the Bosch filter expecting it to be plugged due to the lack of air flow. I was surprised to see it was clean. There were are few small pieces of stuff in the folds of the filter but only about 10 of them. I held the filter up to the light and then tapped it on white paper to see what would fall out. There was nothing present to explain the extreme loss of air flow. I have used Bosch cabin filters in my other vehicles (not HEPA) with great success. I was
hoping to help the allergies of my family but having to run the fan on high to receive any airflow was more annoying than helpful. The noise was irritating and the air flow was still less than the Honda filter I removed. I purchased a new Honda cabin filter and our van is back to normal. I did not realize how much I missed the auto temperature setting. I was setting the temperature about 5 degrees below "normal" to try and keep the temperature consistent, and it was not during the hotter summer months. Unfortunately I am beyond the 30 day Amazon return window so I am not able to return the cabin air filter. :-(
This is my first Amazon review that moved from 5 to 1.....
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Reviewed in the United States on August 18, 2020
★★★★★ 5
Starter
Why did you pick this product vs others?:
Good replacement.
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Reviewed in the United States on June 20, 2025
★★★★★ 5
Starter works great
Fits and works great 2005 Mercury mariner 3.0
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Reviewed in the United States on August 29, 2025