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Description
STI PERFORMANCE MUFFLER (Low back pressure) For WRX S4 (VA) ST44300VV030Brand STI Product PERFORMANCE MUFFLER (Low back pressure) Product Number ST44300VV030 Description This high performance muffler boasts low back pressure, an approximately 16% lower airflow resistance, and a weight reduction of approximately 1. 9 kg compared to the standard models. While complying with the safety standards and Type 1 after market muffler performance tests, this muffler increases acceleration performance by approximately 2%, and makes
| Brand | STI |
| Product | PERFORMANCE MUFFLER (Low back pressure) |
| Product Number | ST44300VV030 |
| Description | This high-performance muffler boasts low back pressure, an approximately 16% lower airflow resistance, and a weight reduction of approximately 1.9 kg compared to the standard models. While complying with the safety standards and Type 1 after-market muffler performance tests, this muffler increases acceleration performance by approximately 2%, and makes the engine more responsive to the operation of the accelerator. This gives the driver of the performance-oriented SUBARU WRX model a sense of integration with the vehicle. In addition, the exhaust sound is tuned specifically to a sporty feel and high-quality sound that fits the character of SUBARU WRX. |
| Compatible Vehicle | WRX S4 (VA) |
| Compatible Models |
Model adaptation symbol: A 2014/08 / -2015 / 05 / STI (AWD / 6MT) ___ STI with a large spoiler (AWD / 6MT) ___ STI Type-S with a large spoiler (AWD / 6MT) ___ model adaptation symbol: B 2015/06 / -2016 / 05 / STI (AWD / 6MT) ___ STI ASP (AWD / 6MT) ___ S207 (AWD / 6MT) - S207 ASP (AWD / 6MT) - with STI large spoiler (AWD / 6MT) ___ STI ASP with a large spoiler (AWD / 6MT) ___ STI Type-S with a large spoiler (AWD / 6MT) ___ STI Type-S with ASP large spoiler (AWD / 6MT) ___ model adaptation symbol: C 2016/06 / - 2017/05 / STI (AWD / 6MT) ___ STI ASP (AWD / 6MT) ___ with STI large spoiler (AWD / 6MT) ___ STI with ASP large spoiler (AWD / 6MT) ___ STI Type-S with a large spoiler (AWD / 6MT) ___ STI Type-S with ASP large spoiler (AWD / 6MT) ___ model adaptation symbol:D 2017/06 / - WRX STI (AWD / 6MT) ___ WRX STI ASP (AWD / 6MT) ___ WRX with STI large spoiler (AWD / 6MT) ___ WRX STI with ASP large spoiler (AWD / 6MT) ___ WRX STI Type- S 19 inch flat-tire (AWD / 6MT) ___ WRX STIType-S ASP 19 inch flat-tire (AWD / 6MT) ___ WRX STI Type-S 19 inch flat tire with a large spoiler (AWD / 6MT) ___ WRX STI Type -S ASP large spoiler 19 inches with tire (AWD / 6MT) ___
|
| Remarks | * It meets safety standards and aftermarket noise regulations. * Two gaskets (SUBARU genuine Part No. 44011SG010) and four self-locking nuts (SUBARU genuine Part No. 902330011) are required separately. * This product can not be installed along with the SUBARU genuine exhaust finisher. * The explanation of this product is for Japanese specification. |
| Notes | Images are for illustration purpose only. Actual product may vary. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.1 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Poli cleaners.
Material Type: Powder Ox, Size: 16 oz
Our trailer was extremely oxidized. I used the Poli wash and fiberglass cleaner, super easy. It removed the oxidation and made our trailer look new again. Next I will try the Poli sealer.
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Reviewed in the United States on May 8, 2026
★★★★★ 3
Works OK.
Material Type: Powder Ox, Size: 16 oz
With a lot of work and diligence (elbow grease), the product works at removing oxidation. I expected it to easily remove the old Poliglow as well. Still lots of work. It will NOT remove the brown water stains from the roof of my molded fiberglass camper. Product is OK, but does not work as easily as advertised.
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Reviewed in the United States on April 19, 2020
★★★★★ 5
It's extremely difficult and when it hasn't been maintained it looks like skin peeling after a sun burn
Material Type: Powder Ox, Size: 16 oz, Material Type: Powder Ox, Size: 16 oz
Poli-glow definitely works. The negative feedback is generally due to someone trying to remove poli-glow. It's extremely difficult and when it hasn't been maintained it looks like skin peeling after a sun burn. I purchased a 41' sailboat with poli-glow. The poli glow was flaking off and had to be removed. It wasn't fun.
In the end, I bought poli-strip and used an orbital sander and wet sanded thru it. Then I used poli-strip, then poli-prep and washed it down. From there I used poli-ox and poli-prep one more time...I basically used poli-prep along with lots of water to wash boat down. The poli-ox when used thick, like a paste, ate through most stains once poli-glow was removed.
It took two-three days of prep. Application took half day per side. I used two kits. Also bought the rectangular special applicator (far better than their mitt). Make sure to have lots of disposable gloves. I don't think the chemicals will harm your hands much...I didn't have gloves for much of the prep work, but gloves are a must when applying poli-glow. Othnerwise your hand get very gunked up.
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Reviewed in the United States on May 24, 2017
★★★★★ 1
Very expensive but worked no better than powdered cleansers
Material Type: Powder Ox, Size: 16 oz
My camper is a 2004 with oxidized paint and dark streaks from being out in the weather. I looked at reviews and there is a lot of hype about this product so I ordered some. I used this on an area of my camper to test it in case it didn't work and guess what...it didn't. It didn't remove the oxidation and black streaking any better than Ajax powder. In one place, when I used it as directed, it wore the paint down to the bare metal and didn't remove dark streaking in the surrounding area. The area I tested it on looked cleaner, but no better than the area I used Ajax powder on the day before. Very expensive for what it didn't do. I do not recommend this product.
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Reviewed in the United States on May 18, 2025
★★★★★ 5
Great product
I have used this for years and it is excellent. Very easy to use.
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Reviewed in the United States on May 13, 2026
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