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Audi B5 S4 2.7t Turbo Install Kit (Supplemental or Full)

$79.00
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✅ In Stock • Ships Within 1 Business Day • Worldwide Shipping Available • Premium Turbo Installation Hardware Kit • OEM-Style Gaskets, Seals, Studs & Bolts • Ready for Your Audi 2.7T K04 Installation
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XS-POWER Audi 2.7T K04 Turbo Installation Hardware Kit

Complete Turbo Install Gasket & Hardware Kit
Audi B5 S4 • C5 A6 • RS4 • K04 • RS6 Hybrid • 2.7T Biturbo
OEM QUALITY SEALS • COMPLETE HARDWARE • LEAK-FREE INSTALLATION • FAST USA SHIPPING
PRODUCT OVERVIEW

Installing new turbochargers on your Audi 2.7T is a major investment, and reusing old gaskets or worn sealing hardware can quickly lead to oil leaks, coolant leaks, boost leaks and costly labor.

The XS-POWER Complete K04 Turbo Installation Hardware Kit contains the critical seals, gaskets, studs, bolts and sealing rings needed for a professional turbocharger installation on the legendary Audi 2.7T Biturbo engine.

Whether you're installing factory BorgWarner K04 turbochargers, RS4 K04s, RS6 Hybrid turbos or XS-POWER performance turbochargers, this installation kit provides the hardware needed to complete the job correctly the first time.

Every sealing ring and gasket is designed to properly seal oil, coolant, exhaust and intake connections while replacing hardware that commonly becomes corroded or damaged during turbo removal.

Perfect for engine-out turbo upgrades, complete engine rebuilds, Stage 3 conversions and preventative maintenance on Audi 2.7T applications.

FEATURES
✔ Complete Turbo Installation Kit ✔ OEM Style Replacement Hardware
✔ Premium Exhaust Gaskets ✔ Oil Feed Sealing Rings
✔ Oil Drain Gaskets ✔ Coolant Feed & Return Seals
✔ Turbo Inlet O-Rings ✔ Turbo Outlet Hardware
✔ Turbo Mounting Bolts Included ✔ Downpipe Studs Included
✔ Prevents Exhaust Leaks ✔ Prevents Oil Leaks
✔ Prevents Coolant Leaks ✔ Ideal During Turbo Replacement
✔ Works With K04 & Hybrid Turbos ✔ Engine-Out Service Recommended
PACKAGE INCLUDES
  • 2 Turbo to Downpipe Gaskets
  • 2 Turbo to Exhaust Manifold Sealing Rings
  • 2 Turbo Inlet O-Rings
  • 2 Oil Drain Gaskets
  • 8 Turbo to Downpipe Studs
  • 6 Exhaust Manifold to Turbo Bolts
  • 4 Boost Reference Line Sealing Rings
  • 4 Oil Feed Line Sealing Rings
  • 1 Oil Feed Adapter Sealing Ring
  • 8 Coolant Feed & Return Sealing Rings
VEHICLE FITMENT

Audi B5 S4

1998-2002 Audi S4 2.7T Biturbo

Audi C5 A6

2000-2004 Audi A6 2.7T Biturbo

Turbo Compatibility

  • OEM BorgWarner K04
  • XS-POWER K04
  • RS4 K04
  • RS6 Hybrid
  • Stage 3 Turbo Systems
  • K04 Hybrid Turbochargers
WHY REPLACE THE INSTALL HARDWARE?
Factory hardware is exposed to years of extreme turbocharger temperatures. Old crush washers, copper sealing rings, exhaust gaskets and studs often become brittle, flattened or corroded. Replacing them during turbo installation helps eliminate:
  • Oil leaks
  • Coolant leaks
  • Boost leaks
  • Exhaust leaks
  • Loose turbo hardware
  • Repeat engine removal due to failed seals
PERFORMANCE BENEFITS
✔ Proper Turbo Installation
✔ Maximum Turbo Reliability
✔ Leak-Free Oil System
✔ Leak-Free Coolant System
✔ Leak-Free Exhaust Connections
✔ Restores Factory Sealing Performance
✔ Saves Time During Engine-Out Service
✔ Professional Installation Results
XS-POWER PERFORMANCE
Professional Turbo Systems • Engineered For Audi Performance Enthusiasts
IN STOCK • FAST USA SHIPPING • WORLDWIDE SHIPPING AVAILABLE
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Warranty Information
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2 Reviews Hide Reviews Show Reviews

  • 5
    ⭐⭐⭐⭐⭐ Perfect Companion for K04 Turbo Installation

    Posted by Jane Godall on 24th Jul 2026

    ⭐⭐⭐⭐⭐ Perfect Companion for K04 Turbo Installation Review: I purchased this kit along with my XS-POWER K04 turbochargers and it made the installation much easier. Every gasket, O-ring, sealing washer, stud and bolt I needed was included, so I didn't have to hunt down missing hardware or reuse old seals. Everything fit exactly as it should, and after completing the installation there were no oil leaks, coolant leaks or exhaust leaks. The quality of the hardware was excellent and it gave me confidence that the job was done right the first time. If you're doing an engine-out turbo upgrade on an Audi B5 S4 or C5 A6 2.7T, this kit is well worth adding to your order. It saves time, prevents headaches, and helps ensure a leak-free installation. Highly recommended for anyone installing K04, RS4 or RS6 hybrid turbochargers.

  • 5
    ⭐⭐⭐⭐⭐ Everything Needed for a Perfect Turbo Install!

    Posted by Jane Godall on 24th Jul 2026

    <div style="font-family:Arial,Helvetica,sans-serif;line-height:1.6;"> <h3 style="color:#c40000;margin-bottom:5px;">⭐⭐⭐⭐⭐ Everything Needed for a Perfect Turbo Install!</h3> <p><strong>Verified Buyer</strong></p> <p> I ordered this kit along with my new K04 turbochargers and it had everything needed to complete the installation. The gaskets, O-rings, sealing washers, studs and hardware were all high quality and fit exactly like the factory parts. It saved me from trying to track down individual pieces and made the installation much easier. </p> <p> After the install there were no oil leaks, coolant leaks or exhaust leaks, which is exactly what you want after doing an engine-out turbo job on a B5 S4. Everything sealed perfectly and the hardware fit without any issues. </p> <p> If you're installing K04, RS4 or RS6 hybrid turbos on a 2.7T, I highly recommend buying this kit at the same time. It gives you peace of mind knowing you're replacing all of the critical sealing components instead of reusing old hardware. </p> <p><strong>Highly recommended!</strong></p> </div>