Drag Race GTX4708R, 52 Trim, 77.8 Inducer, 108 Exducer – Garrett P/N: 804878-1, w/o Turbine HSG

The Drag Race GTX4708R is purpose-built for competitors racing under class rules that cap compressor wheel size, giving serious drag racers a way to stay legal without sacrificing the GTX platform’s performance DNA. Supplied without a turbine housing, this unit is designed for builders who already have a GT47 series turbine housing on hand or plan to source one separately. It’s the choice for teams who need a class-compliant compressor wheel combined with proven Garrett GTX-R ball bearing architecture.

Specifications

• Compressor Wheel Trim: 52 Trim
• Compressor Wheel Inducer: 77.8 mm
• Compressor Wheel Exducer: 108 mm
• Turbine Housing: Not included (w/o Turbine HSG)
• Garrett P/N: 804878-1
• Alternate P/N: 804878-5001
• Alternate P/N: 804878-5001s

Performance & Application

This turbo is engineered specifically to meet class requirements limiting competitors to a 78mm compressor wheel, making it the go-to solution for drag racers who need to stay within those bounds while running a GTX-based turbocharger. The turbine side is designed to mate with any GT47 series turbine housing, giving racers flexibility in matching housing A/R to their specific setup. Because it shares the same compressor housing style as the GT47, this unit is externally interchangeable with an existing GT47 turbo setup, simplifying swaps for teams already running that platform.

Compatibility & Fitment

• Turbine side mates to any GT47 series turbine housing
• Externally interchangeable with existing GT47 turbo setups
• Uses the same compressor housing style as GT47

Frequently Asked Questions

Does the GTX4708R come with a turbine housing?

No, this unit is supplied without a turbine housing. It is designed so the turbine side will mate to any GT47 series turbine housing.

Why is the compressor wheel sized at 77.8mm inducer?

This turbo is built to meet class requirements that limit competitors to a 78mm compressor wheel, making the 77.8mm inducer specifically compliant with that rule.

Can I use my existing GT47 turbine housing with this turbo?

Yes, the turbine side of this turbo will mate to any GT47 series turbine housing.

Is this turbo compatible with an existing GT47 setup?

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

For drag racers bound by a 78mm compressor wheel class limit who still want the performance and interchangeability of the GT47 platform, the GTX4708R delivers exactly the compliant, drop-in solution the rulebook demands.