2005 Audi A4
Turbocharger

The stock turbo (either the AN made by us or the ON made by Borg Warner) is rated at 150hp.  The High performance turbo (HP) is rated at 225hp.   These are 'bench numbers' so you will not get a 50% boost in real life.   Expect something closer to 20-30% boost in 'wheel horse power' when on the car.  

Flashing the engine after an HP install is also recommended for the engine computer to recognize the larger turbo and adjust for it. 

The OEM turbo is the orginal Audi replacement as if you were to purchase it from a dealer. The potential power output is identical to the stock turbo. The high performance turbo is a  K04 upgrade.  Performance potential goes from 150 to 225hp if you have your ECU reprogrammed .  You will need to install a new oil feed line as well.

This is a stock replacement K03 turbo.

Yes, our 40-30002HP is equivalent to the Borg Warner K04 and will support up to 225hp.

This is the stock K03 turbo. The high performance turbo is the K04 upgrade, listed below it.

Yes, the stock replacement is the K03 and the high performance turbo is the K04.

This turbo is a direct fit stock K03 replacement. We do not currently have the dimensions available but this turbo has the same specifications as your stock unit, it is not a performance upgrade. We do offer high performance K04 turbos as well which have the capability to produce 225hp with tuning.

Yes, this turbo will replace the afformentioned Audi part numbers.

Thank you for your inquiry. The standard turbo should be about 150hp in comparison to the high performance, which can produce up to 225hp.

Thank you for your inquiry. The turbocharger on this listing does not include gaskets. We do carry the turbocharger as part of a kit including the gaskets, which you can find by clicking on this link.

Thank you for your inquiry. In order to get the full performance out of the HP replacement you would have to tune the ECU.  We recommend getting with a local shop that handles these types of performance upgrades for more specifics on what exactly it entails.

Thank you for your inquiry. The factory replacement for the 1999 Audi A4 is a K03.

Thank you for your inquiry. We catalog our parts by year, make, and model so we do not have the requested information. The turbocharger on this listing is manufactured to OEM specifications so it will have the same performance as the original unit installed from factory.

Gracias por su pregunta pero no comprendemos que esl lo que esta preguntando.

Thank you for your inquiry. Please call us at 888-907-7225 so we may better assist you.

Thank you for your inquiry. The turbocharger selected derives from original equipment and will come with the same specifications as the original one installed in the vehicle so you should not get any increase in horse power. If you go with the HP option we offer within this listing you should see up to a 75 horse power increase.

Yes, this turbocharger is the correct one for your vehicle.

We do stock the KO4 from Borg Warner but it is not listed on our website. Please contact our sales department at 888-907-7225 for a quote.

The turbo and intercooler are two different parts, not a single assembly, but every vehicle that this turbo fits is also equipped with an intercooler, usually tucked right behind the bumper.

This turbo (40-30002 SG) is a stock replacement that's going to fit and function just like OEM. If you have a few other bolt-on mods, it shouldn't be an issue with this turbo, but we also have a K04 upgrade available here:

https://www.buyautoparts.com/buynow/40-30002_SH

The K04 has a slightly larger compressor housing that can flow more air and create more power, while still retaining a response close to the OEM K03; none of the lag traditionally associated with a big turbo. If you need to replace your turbo anyway, it's not a huge price increase, and it's much better suited for the higher dyno numbers you're trying to get.

This turbo (40-30002 SG) is a stock replacement that's going to fit and function just like OEM. If you have a few other bolt-on mods, it shouldn't be an issue with this turbo, but we also have a K04 upgrade available here:

https://www.buyautoparts.com/buynow/40-30002_SH

The K04 has a slightly larger compressor housing that can flow more air and create more power, while still retaining a response close to the OEM K03; none of the lag traditionally associated with a big turbo. If you need to replace your turbo anyway, it's not a huge price increase, and it's much better suited for the higher dyno numbers you're trying to get.

This turbo (SKU 40-30002) fits all US-spec 1997-2006 Audi A4 and VW Passat 1.8T

Yes, this turbo (40-30002 BW) is a genuine OEM BorgWarner stock replacement, the exact same item you'd get from an Audi or VW dealer, and it's going to fit just like the stock turbo it's replacing.

This turbo (Stigan 847-1001, SKU 40-30002 SG) is a stock replacement that's going to fit and function just like OEM on all US-spec 1997-2006 Audi A4 1.8T or Volkswagen Passat 1.8T

No, this turbocharger (40-30002) is for a 1997-2006 Audi A4 1.8T or VW Passat 1.8T. Your SLK230 is supercharged, not turbocharged, but we have a replacement supercharger available here:

https://www.buyautoparts.com/buynow/40-10018

This turbo (Stigan 847-1435) does not include the gaskets, but we have it available with gaskets and an oil feed line (for better long-term reliability) here:

https://www.buyautoparts.com/buynow/40-80345_S5

No, this turbo (40-30002) is for 1996-2006 Audi A4 1.8T & 1998-2005 VW Passat 1.8T. What year is your Civic 1.5T? We can check to see if we have the correct turbo listed on the site.

Thank you for your inquiry. Yes. The AN, SG, R, and BW versions are all OEM replacements that comply with CA emissions. The high-performance upgrade versions, AW, HP, OH, and SH are not.

Thank you for your inquiry. Do you have a VIN. a 2001 VW 1.8L GTI was an Natural Aspirated when it was produced here in the USA. 

Thank you for your inquiry. Cannot ship to California or Colorado due to CARB restrictions.