Select Vehicle From Dropdown

K04 turbos for 2.7T-(new OEM Borg Warner) PAIR (left and right) for B5 S4-RS4, C5 A6 and allroad w 2.7t

SKU: BOR-53049880025-53049880026



These are OEM K04s from the German RS4. These are the necessary turbos required to fit your engine with Audi RS4/K04 turbochargers.


NOTE: 03 and 04 A6s and Allroads with Automatic transmission have a different downpipe design, some modification is required for these to bolt on.

NOTE: This is a non stocking part and due to our suppliers Terms and Conditions, cannot be returned or cancelled without a restocking fee. For more lienient T&C please look into our JHM RS6-RS Turbos


Includes: 2-new OEM K04 turbos for B5 S4 (2.7T)


-Compressor wheel: 40mm inducer, 51mm exducer
-Fitment: bolts up just like a stock K03 turbo would except that it requires K04 inlet pipes and couplers (see below)


- Necessary couplers (2) and clamps for installing the inlets. Use dropdown box below.
- Turbo Hardware. Comes with all gaskets, studs and sealing rings to install the turbos. Use dropdown box below.
- Turbo Inlet Pipes. We sell 034 replica inlets. Use dropdown box below.
- OEM Oil Pressure Line Kit. If you are concerned with the condition of your Oil Pressure (feed) lines to the turbos, this kit come with both lines and the sealing washers for the distribution block at the rear top of the engine. Use dropdown box below.


***Warranty information:***
Borg-Warner warranties any failure due to manufacturer defects for 12 months. In the event that a turbo purchased direct from JHM is not performing to manufacturer specifications, the customer will be responsible for purchasing a replacement until the warranty review process is complete if they are not willing to wait until the review is complete. The malfunctioning part will then be sent out for warranty inspection immediately after it is received by JHM, at which time we will wait to hear from Borg-Warner as to whether the item failed due to manufacturer defects or for other reasons. The most common reasons of a rejected warranty for any turbo but not limited to are: oil pressure and/or feed lines that have excess sludge or deposits in them thus releasing deposits into the turbo and causing failure - oil pressure and/or feed lines that are plugged or partially plugged thus restricting oil to or from the turbo causing failure - damage caused due to improper installation - poorly maintained engines that have oil sludge and deposits that get released into the new turbo. After inspection if the suspected defective turbo is determined to be truly defective by the manufacturer you will be sent back a replacement or refunded for the amount of the replacement you purchased if you bought one in advance as previously stated. (excluding shipping). JHM and Borg-Warner are NOT responsible for the labor costs associated with the install of these items nor the labor costs associated with replacement of warrantable parts. For further information please contact JHM.


Left Turbo OEM PN = 078145705HP and Borg Warner PN = 53049880025 Right Turbo OEM PN = 078145706HP and Borg Warner PN = 53049880026



For shipping quotes: Please sign in or join then put the items you want in your shopping cart and proceed to checkout.

This product fits the following vehicles:
Make Model Chassis Engine
Audi RS4 B5 (1999-2001) 2.7t V6 30v
Audi allroad C5 (2001-2005) 2.7t V6 30v
Audi A6 C5 (1998-2004) 2.7t V6 30v
Audi S4 B5 (1997-2002) 2.7t V6 30v
Write Your Own Review
You're reviewing: K04 turbos for 2.7T-(new OEM Borg Warner) PAIR (left and right) for B5 S4-RS4, C5 A6 and allroad w 2.7t
Off-road Use

By Purchasing any Off-Road use ONLY products from JH Motorsports, Inc. I acknowledge and understand the following disclosure. (This notice is located at the bottom of the page description of affected products on our website.)

Vehicle Code § 27156:
(b) No person shall operate or leave standing upon a highway a motor vehicle that is required to be equipped with a motor vehicle pollution control device under Part 5 (commencing with Section 43000) of Division 26 of the Health and Safety Code or any other certified motor vehicle pollution control device required by any other state law or any rule or regulation adopted pursuant to that law, or required to be equipped with a motor vehicle pollution control device pursuant to the National Emission Standards Act (42 U.S.C. Secs. 7521 to 7550, inclusive) and the standards and regulations adopted pursuant to that federal act, unless the motor vehicle is equipped with the required motor vehicle pollution control device that is correctly installed and in operating condition. No person shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise any device, apparatus, or mechanism intended for use with, or as a part of, a required motor vehicle pollution control device or system that alters or modifies the original design or performance of the motor vehicle pollution control device or system.

Health and Safety Code § 43000:
43001. The provisions of this part shall not apply to:
(a) Racing vehicles.

As the aforementioned code sections outline, it is against the law to operate or use a vehicle on public streets or highways with modified, altered, or disconnected motor vehicle pollution control devices. This may include but is not limited to, Evaporative Fuel Controls, Catalysts, DPF, PTOX, PCV Systems, Exhaust Gas Recirculation Systems, Oxygen Sensors, Thermostatic Air Cleaners, Air Intake Systems, Fuel Injectors, Regulators, Adjustable Cam Gears, ECU Programming, Mapping, or other Computer Modifications. Air Pumps, Air Injection, Timing, and any other Emission System Modification(s).

Purchaser acknowledges and certifies to JH Motorsports Inc., that Purchasers vehicle will only be used for racing applications or off road vehicle use only. Purchaser requests these modifications for the purpose of enhancing the vehicle for competitive Racing Applications and will not use this vehicle on public streets or highways. Purchaser agrees to indemnify JH Motorsports Inc., all employees, officers, owners, and subsidiaries for any civil or criminal liability arising out of use of Purchasers vehicle on public streets or highways as Purchaser has been duly notified of the laws and regulations regarding disconnecting, alteration, or modification of a vehicle’s pollution control devices. Purchaser understands and has been advised the driving of a vehicle on public streets or highways could result in criminal or civil penalties.

Prop 65

Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

Learn More:

Q and A

Product Questions

No questions yet. Be the first to ask the question!