APR Stage III is our cutting-edge turbo upgrade for your Passat 1.8T. We at APR have worked long and hard to bring you the finest 1.8T upgrade available. Both kits are made with the best materials and engineering available, from the exhaust manifold to the hose clamps. APR Stage III is offered in a 280hp version. Our Stage III kit consists of the following components:

• APR Investment Cast Inconel Exhaust Manifold
• Garrett/Allied Signal Ballistic Series Ball-Bearing Turbocharger
• APR High Flow Catalytic Converter
• APR Custom Cast Urethane and Silicone Intake Hoses
• APR High Flow Fuel Injectors
• All Associate Plumbing and Hardware

The most important part of the Stage III kit is the exhaust manifold. APR has spent enormous time and resources developing the turbo manifold. The exhaust manifold has been designed in Pro/Engineer 20, a 3-D modeling package and validated extensively on the computer using Exa Powerflow, a CFD analysis program. By performing a computational fluid dynamics analysis, we were able to study exhaust flow, pressure drops, and fluid flow through the exhaust manifold. Multiple computer simulations were done to prove the design before we even had a physical manifold in our hand.

The exhaust manifold is mated to a Garrett turbocharger that replaces the stock Triple K K03 turbocharger. We chose to use a Garrett turbocharger in lieu of a Triple K unit for several reasons. First of all, the new Garrett GT-Series is a more efficient design than the old Triple K K-24 turbocharger used by one of our competitors (the K-24's design dates back to the mid 70's). The Garrett turbocharger we have selected is a 1990's design. Also, Garrett turbochargers are available in a wider variety of configurations than the Triple K line, which allowed us to find a more exact match. The stock injectors are maxed out at power levels much over 220HP and consequently the fuel injectors have been replaced by larger units with an ECU upgrade to control them.

Please specify year in payment notes!

****An exhaust system with a downpipe (sold separately) is required with Stage III.