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Description
STI ENGINE MOUNT LH For IMPREZA 5DooR (GG) ST4100055120Brand STI Product ENGINE MOUNT LH Product Number ST4100055120 Description The hardened rubber on the mounting part of the power unit reduces unit vibrations. This product improves the throttle response and shift feeling. Compatible Vehicle IMPREZA 5DooR (GG) Compatible Models Model adaptation symbol: A 2000 year 08 Jan 2001 08 May 20K (AWD 5MT) ___ 20K (AWD 4AT) ___ STI (AWD 6MT) ___ model adaptation symbol: B 10 January 20K 2001 September to 2002
| Brand | STI |
| Product | ENGINE MOUNT LH |
| Product Number | ST4100055120 |
| Description | The hardened rubber on the mounting part of the power unit reduces unit vibrations. This product improves the throttle response and shift feeling. |
| Compatible Vehicle | IMPREZA 5DooR (GG) |
| Compatible Models |
Model adaptation symbol: A 2000 year 08 Jan-2001 08 May 20K (AWD / 5MT) ___ 20K (AWD / 4AT) ___ STI (AWD / 6MT) ___ model adaptation symbol: B 10 January 20K 2001 September to 2002 (AWD / 5MT ) ___ 20K (AWD / 4AT) ___ 20K TYPE EURO (AWD / 5MT) ___ 20K TYPE EURO (AWD / 4AT) ___ STI (AWD / 6MT) ___ model adaptation symbol: C 2002 November to 2003 08 May WRX (AWD / 5MT ) ___ WRX (AWD / 4AT) ___ model adaptation symbol: D 2003 September to 2004 May WRX (AWD / 5MT) ___ WRX (AWD / 4AT) ___ model adaptation symbol: E 2004 year 05 January to May 2005 WRX (AWD / 5MT ) ___ WRX (AWD / 4AT) ___ model adaptation symbol: F 2005 year 06 January to May 2006 WRX (AWD / 5MT) ___ WRX (AWD / 4AT) ___ model adaptation symbol: G 04 May 2006 06 May and 2007 WRX (AWD / 5MT) ___ WRX (AWD / 4AT) ___
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| Remarks | * Installing this product increases vibration and noise in the car body. * For competition only * The explanation of this product is for Japanese specification. |
| Notes | Images are for illustration purpose only. Actual product may vary. |
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4.1 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
For motorcycles
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
Great stuff, good price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
★★★★★ 5
The best lower unit gear oil I have used
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
I have been boating my whole life, this is by far the best gear oil. I use this in my Johnson 115 even though this is technically made by Mercury. I seem to get less if any water intrusion into my gearcase with this oil. If there is any, the oil emulsifies the water and continues to protect the gears. I have had better luck with this than Pennzoil marine or others. Highly recommend. It is a blue color and easy to drain and fill.
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Reviewed in the United States on March 23, 2026
★★★★★ 5
Great
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
Great lube for the boat
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
recommend
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
great price
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Reviewed in the United States on May 22, 2026
★★★★★ 4
Does not come with a pump.
Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube
The Good: Changing the fluid in the lower unit is a very easy DIY job. This can save you hundreds of dollars each year by doing it yourself.
The Bad: You need a special pump to change the oil, and sometimes it comes with the gear lube. Unfortunately this product did not come with it. Luckily my neighbor had an extra one from changing the lube a different boat laying around and was able to use that.
The Ugly: If you have to go get the pump, that could cost a few extra dollar but is just an extra nuisance. The pumps are interchangable but you just need to clean it between uses (DON'T MIX DIFFERENT OIL BRANDS)
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Reviewed in the United States on October 28, 2025