Features

• GEN II COMPRESSOR WHEEL AERODYNAMICS
• 80MM COMPRESSOR INDUCER | 120MM COMPRESSOR EXDUCER
• 93MM TURBINE INDUCER | 84MM TURBINE EXDUCER
• 9% INCREASED COMPRESSOR FLOW
• LARGER .88 A/R COMPRESSOR HOUSING VOLUTE
• GTX4720R FEATURES A 120mm COMP EXDUCER (+ 2 mm) AND HAS 30% LOWER INERTIA COMPARED TO GTX4718R
• SUPERCORE AND TURBINE HOUSING SOLD SEPARATELY
• COMPATIBLE WITH GT AND GTX TURBINE HOUSINGS

WARNING: Maximum allowable turbocharger speed is 85krpm. The use of this product above max turbocharger speed is at the owner’s risk, and can result in damage and premature failure. To protect the turbocharger from overspeed when operating, a speed sensor can be installed into the compressor housing to monitor shaft speed. Sensors sold separately.

Performance results of this product are highly dependent upon your vehicle’s modifications and tuning/calibration. The horsepower numbers represented above are calculated based strictly on choke flow of the compressor map (total turbo capability), which represents the potential flywheel horsepower.

COMPRESSOR MAP

EXHAUST FLOW CHART

Gen II Compressor Wheel Dimensions and Aerodynamics

GTX4720R Available in 76mm, 80mm, and 88mm inducer diameters

• Comp exducer is now 120mm (+2mm vs Gen 1)
• Gen II wheel produces 9% more air flow
• 30% lower inertia

• Reduced inertia due to reduction of material in the hub and blades
• Roughly 20% lower mass
• Lower inertia helps make boost faster and increases overall turbo efficiency
• Increased flow has potential to make more power at same boost or same power at lower boost levels

Larger Comp Exducer on Gen II

.88 A/R Compressor Housing

Gen II features a larger .88 A/R (Gen I .69 A/R)

• This helps maximize the power capacity of the new compressor wheel.
• This is also the same compressor housing used on the GTX5533R (85mm and 88mm)

Larger Compressor Volute

.88 A/R Compressor Housing

Gen II features a larger .88 A/R compressor housing that will cause an increase in outline dimensions only on the cold side of the turbo.

• +6mm longer on the comp outlet Fig. A
• +10mm longer on the comp inlet Fig. B
• Comp outlet diameter 107mm (same)
• Not outline interchangeable with gen 1

Dimensional Compressor Measurements vs. Gen I

Additional Features

• Lightweight billet backplate
• (NEW) Backplate to compressor housing O-ring
• Speed sensor port compatible only with new flange style speed sensors: (pn 781328-0003 Street Kit | pn 781328-0004 Pro)

Compatible only with New G Series Speed Sensor

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