The Drag Race GTX4508R is purpose-built for competition applications where class rules cap compressor wheel size at 80mm, giving drag racers a way to maximize flow within that limit. It’s engineered for teams and builders running existing GT45-based setups who need a drop-in upgrade without reworking their turbine-side hardware. This is a serious tool for racers who need every available cubic foot of airflow while staying within a strict technical inspection boundary.

Specifications

• Compressor Wheel Trim: 55 Trim
• Compressor Wheel Inducer: 79.8mm
• Compressor Wheel Exducer: 108mm
• Bearing System: Ball Bearing
• Turbine Housing: Not included
• Garrett P/N: 800270-1
• Alternate P/N: 800270-5001
• Alternate P/N: 800270-5001s

Performance & Application

This turbo was designed specifically to meet class requirements that limit competitors to an 80mm compressor wheel, making it the go-to choice for drag racers competing under that restriction. It uses the same compressor housing style as the GT45, so it slots into place without disrupting the rest of an existing GT45-based turbo system. The turbine side is built to mate with any GT45 series turbine housing, giving builders flexibility to pair it with the housing configuration that best suits their engine and spool characteristics. It’s best suited for dedicated drag race builds where compressor-side flow needs to be pushed to the edge of a class-mandated wheel size.

Compatibility & Fitment

• Mates to any GT45 series turbine housing
• Externally interchangeable with existing GT45 turbo setups

Frequently Asked Questions

Is the GTX4508R a ball bearing turbo?

Yes, it falls under Garrett’s GTX-R Ball Bearing lineup.

Does this turbo come with a turbine housing?

No, this turbo is sold with no turbine housing included.

What class requirement is this turbo designed to meet?

It’s built to meet class requirements that limit competitors to an 80mm compressor wheel.

Can I use this with my existing GT45 turbine housing?

Yes, the turbine side of this turbo mates to any GT45 series turbine housing, and it is externally interchangeable with an existing GT45 turbo setup.

For drag racers boxed in by an 80mm compressor wheel rule, the GTX4508R delivers class-legal compliance without sacrificing the flow potential built into the GT45 platform.