APR Stage III Turbo and ECU Upgrade for MkIV VW Golf and Jetta

APR announces the Transverse Stage III system. The ultimate turbo system upgrade is now available for the Volkswagen MkIV 1.8T. This kit is capable of 290 horsepower and 296 foot-pounds of torque at the flywheel on 93 octane gas, while retaining stock-like drivability. The highlights of the kit include the following:

• APR Investment Cast Inconel Exhaust Manifold
• Honeywell/Garrett GT28 Ballistic Series Ball-Bearing Turbocharger
• Larger APR designed Mass Airflow Sensor Housing
• APR Custom Cast Silicone Intake Hoses
• APR High Flow Fuel Injectors and Fuel Pump
• All Associated Plumbing and Hardware

The Stage III utilizes one of the newest and most efficient turbos available. The Honeywell/Garrett GT28 turbos utilize the latest ball bearing design coupled with an integral wastegate and Inconel wheel. Make no mistake, these are not standard turbos retrofitted to ball bearing specs; they are the same type used in countless forms of motor racing such as the Audi R8 in the 24 Hours of Le Mans Series. APR is one of a few Garrett Engineering Houses in the US. APR works closely with Garrett engineers to design turbos that produce our desired performance level for each kit.

The APR Exhaust manifold is investment cast Inconel 625. Such material was chosen for its excellent thermal properties. Inconel can withstand temperatures of up to 2500 degrees Fahrenheit without structural degradation. The manifold runners are paired so that the exhaust pulses do not interfere with each other. This design maximizes low-end spool-up and boost-response. The manifold runners were also sized according to the power levels desired and with the size of the exhaust ports in mind. In order to prove the design, the drawing, as it existed in Pro-E, was run through a computational fluid dynamics program. This APR exhaust manifold is arguably the best 1.8T manifold available anywhere in the world due to its superior design and construction. No other company in North America has come close to reproducing a manifold at this level.

Other components quickly reached their operational limits and were also fabricated. The increased flow necessitated a larger MAF Housing. The diameter of the intake tubing was also increased to accommodate the increased airflow. A new larger air horn was placed on the MAF to further increase velocity. A flow straightener was then added to keep turbulence to a minimum. A flow straightener seems like a small detail and is easily overlooked by most companies. However, this "small detail" is an integral component of this system allowing the larger MAF housing to be properly utilized. A new high volume fuel pump was added along with larger injectors to keep the fuel system within acceptable parameters.

APR engineers write their own proprietary data logging software and analysis programs. This tuning software, combined with APR's Dynapack chassis dynamometer, allows a degree of precision never before seen in the aftermarket industry. Our dyno tuning allows us to tune to any RPM at any load level. This equates into the smoothest, most powerful tuning available. Our software, as with our hardware, is equally ahead of the competition. It's a rare combination to find a tuning company that engineers both the software AND the hardware for their systems. The advantage of designing hardware that is built to utilize our specific software, is obvious. APR hardware working with APR software is what comprises a truly engineered "system" and not just a conglomeration of parts.

The power increase with the APR Stage III+ kit for the 1.8T is substantial. It is highly recommended that brake and suspension upgrades are done to safely use the potential of this upgrade. It is also recommended that the stock engine internals be upgraded for power levels above 93 octane, as APR is not responsible for this type of damage to the engine.

Note:
An exhaust system (which is required) is not included with the kit and will need to be purchased separately.

Free shipping on this item (if advertised) only applies inside the continental US.