BigUPPER K03 (VW 20V-spec)

FLOW MORE FROM YOUR 1.8T's TINY K03 TURBO:  Hot air takes up more space than cold air. Cooling it inside the compressor with water/methanol condenses the air and back pressure drops. The wastegate then forces the turbo to spin faster to get it back.

The result is the same mechanically-set boost level but with greater mass air moved towards the engine. Spool characteristics are left identical to stock, but peak flow is "BIG UPPED". A 1.8T K03 instantly performs more like a K04 up top where it counts with no ECU reprogramming required. Of course, a K04-001 will only become even more potent. Fits aftermarket high-flow turbo inlet pipes. Supplied together with the USRT Boost Trigga switch and Solenoid Upgrade to ensure that spray is delivered only at nearly maximum boost conditions.

Mounting veins are knife edged and center section is streamlined for minimal air disruption. Feed line is only 1/8" diameter for even less air disturbance. All 30 or 50cc/min of flow is directed at compressor nut to avoid blade tip erosion.

Note: Drop-in installation in Golf/Jetta requires an aftermarket throttle inlet pipe upgrade. Recent testing demonstrates that installation in a stock Audi TT180 pipe is possible.

Wear is essentially non-existent after 29k miles and about 50 gallons (189 liters) total consumption.