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BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left)
BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left)
BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left)
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BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left)

Marsoni M251S
Sale price$887.63
Pay 4 payments of $221.91 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left)SKU: 53049880025 UPC: 4063984007249 BorgWarner Turbocharger SX K04 Audi RS4 Upgrade (Left) 2000 2002 The BorgWarner SX K04 Turbocharger serves as a left side upgrade for the twin turbo 2. 7L engine in 2000 2002 Audi RS4 models. This direct bolt on replacement delivers higher boost levels with faster spool up compared to stock K04 turbos. Pair it with the matching right side unit for balanced power gains up to 500+ horsepower. Key Features Billet
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 2259 reviews
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T
Verified Purchase
Tom
Belleville, US
★★★★★ 3
charger works, not the adhesive on the ring.
Style: Qi2 Charging Mount
The metal ring adhesive was destroyed by the unit's heat in a few weeks. Do not buy it if you need the adhesive ring to hold the phone. The blinking light ring is annoying - why is it needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
M
Verified Purchase
MuscleGuy
Carnegie, US
★★★★★ 5
LOVE this Charger!
Style: Qi2 Charging Mount
This is one of the best chargers I have ever had! My phone stopped charging via the cord and this was my solution and what a awesome one it is! It charges very fast! I also LOVE the way it looks attached to my Tesla screen. Its like having a second screen. I can do Waze on one screen and Tesla navigation on the main screen. I can also control Sirius XM without having to subscribe to it separately for my tesla - which by the way is ridiculous if you already have a subscription…just make sure you done have Allstate DriveWise or other haptics that track weather you’re using your iphone while driving.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
C
Verified Purchase
Cesar Alvarez Alvarez
Waukegan, US
★★★★★ 5
good product
Style: Qi2 Charging Mount, Style: Qi2 Charging Mount
It exceeded my expectations, a really good product indeed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
E
Verified Purchase
El artículo está muy bueno
New York, US
★★★★★ 5
Buenísimo
El producto está muy bueno lo recomiendo
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
A
Verified Purchase
Andrew
Phoenix, US
★★★★★ 3
It is ok
It is decent. Looks like it would work well. It is a little bulky. I bought this one and another one from a different seller. I returned this one due to the thickness of the arm. It was a little bulky. One thing to be mindful of there is no adjustment for the radius of the arm. Depending on how you position it your phone can be quite far away from the screen, it may not bother you, but for me I wanted them as close as possible
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026

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