Drag Race GTX4718R, 84.8mm Inducer, 118mm Exducer – Garrett P/N: 804878-5, w/o Turbine HSG

The Garrett GTX4718R is a purpose-built drag race compressor stage engineered for competitors racing under 85mm compressor wheel class restrictions. Built for teams who need maximum airflow within a strict inducer limit, this turbo delivers GTX-series ball bearing performance while staying fully compliant with class rules. It’s the choice for drag racers who refuse to sacrifice performance for compliance.

Specifications

• Compressor Wheel Inducer: 84.8mm
• Compressor Wheel Exducer: 118mm
• Turbine Housing: Not included (w/o Turbine HSG)
• Turbine Compatibility: Accepts any GT47 series turbine housing
• Compressor Housing Style: Same as GT47
• Garrett P/N: 804878-5
• Also Known As: GTX4718R
• Alternate P/N: 804878-5005, 804878-5005S

Performance & Application

This compressor stage is designed specifically to meet class requirements limited to a 85mm compressor wheel, making it the go-to solution for drag racers competing in inducer-restricted classes. Because it’s externally interchangeable with an existing GT47 turbo setup, it allows teams to upgrade within their current turbine housing and mounting infrastructure without reworking the rest of the system. The turbine side mates to any GT47 series turbine housing, giving builders flexibility to match housing A/R and flange configuration to their specific application.

Compatibility & Fitment

• Compatible with any GT47 series turbine housing
• Externally interchangeable with existing GT47 turbo setups

Frequently Asked Questions

Why does the GTX4718R use a 84.8mm inducer instead of a full-size GT47 wheel?

This turbo is built to meet class requirements that are limited to a 85mm compressor wheel, so the inducer is sized specifically to comply with that restriction.

Does the GTX4718R come with a turbine housing?

No, this turbo is sold without a turbine housing (w/o Turbine HSG), but the turbine side will mate to any GT47 series turbine housing.

Can I swap my existing GT47 turbo for the GTX4718R without changing my setup?

Yes, this turbo is externally interchangeable with an existing GT47 turbo setup and uses the same compressor housing style as GT47.

What does GTX4718R refer to?

GTX4718R is the alias for Garrett P/N 804878-5, the Drag Race GTX4718R compressor stage with 84.8mm inducer and 118mm exducer.

For racers locked into an 85mm compressor class, the GTX4718R delivers a compliant, drop-in solution that leverages proven GT47 architecture without compromise.