Garrett GTX4709 Turbo - 76MM Supercore | 851285-5011S

Garrett GTX4709R Gen II Supercore | 76mm Compressor | P/N 851285-5011S

The Garrett GTX4709R Gen II Supercore (851285-5011S) is a serious airflow weapon for builders looking to support four-digit horsepower while retaining the flexibility to choose the turbine housing that best fits their application. Featuring Garrett's proven dual ball bearing center section, Gen II billet compressor wheel technology, and massive GTX47 rotating assembly, this supercore delivers exceptional airflow, rapid transient response, and outstanding durability under extreme boost levels.

Unlike a complete turbocharger, this supercore includes the compressor housing, CHRA, turbine wheel, and shaft assembly, but does not include a turbine housing. This allows racers and custom fabricators to pair the turbo with the turbine housing A/R and flange configuration best suited to their engine combination.

At the heart of the GTX4709R Gen II is a 76mm billet compressor wheel with a 109mm exducer, engineered to provide increased flow and reduced inertia compared to previous-generation GTX designs. On the hot side, the turbo utilizes Garrett's massive 93mm / 84mm turbine wheel, providing the exhaust flow capacity required for high-horsepower drag racing, truck pulling, street performance, and motorsports applications.

Whether you're building a high-boost diesel, a radial tire drag car, or a serious street machine, the GTX4709R Gen II Supercore delivers the airflow, efficiency, and reliability that have made Garrett a benchmark in performance turbocharging. Garrett identifies the 851285-5011S as the 76mm GTX4709R Gen II Supercore with a 109mm compressor exducer and 93mm/84mm turbine wheel.

Features

• Genuine Garrett GTX4709R Gen II Supercore
• Part Number: 851285-5011S
• Dual ball bearing center section
• Billet Gen II compressor wheel design
• Turbine housing sold separately
• Compatible with GTX47 and GT47 turbine housings
• Excellent balance of airflow and response
• Ideal for custom turbocharger builds

Specifications

• Compressor Inducer: 76mm
• Compressor Exducer: 109mm
• Compressor Housing A/R: 0.88
• Turbine Wheel Inducer: 93mm
• Turbine Wheel Exducer: 84mm
• Bearing System: Dual Ball Bearing
• Turbo Configuration: Supercore (No Turbine Housing)

Common Applications

• High-performance diesel engines
• Competition drag racing vehicles
• Truck pulling builds
• Street and strip performance applications
• Custom turbocharger fabrication projects

What's Included

• Garrett GTX4709R Gen II Supercore Assembly
• Compressor Housing
• CHRA (Center Housing Rotating Assembly)
• Turbine Wheel & Shaft Assembly

Note: Turbine housing is not included and must be purchased separately. Compatible GTX47 turbine housings are available in multiple A/R configurations to tailor spool characteristics and peak power output.