Turbocharger Garrett GTX4508R 108mm (80mm) w/ Compact 42, DIVIDED 1.15 AR T4

The Garrett GTX4508R represents the pinnacle of the GT45 ball bearing lineup, engineered for serious race applications demanding massive top-end power without sacrificing the response advantages of ball bearing technology. Built for builders chasing four-digit horsepower numbers, this turbocharger combines a compact footprint with the flow capacity to support extreme boost levels. It’s the choice for enthusiasts and race teams who need proven Garrett engineering at the highest performance tier.

Specifications

• Compressor Wheel Inducer: 79.8mm
• Compressor Wheel Exducer: 108.0mm
• Compressor Trim: 55 trim
• Turbine Wheel: 87.0mm
• Turbine Trim: 85 trim
• A/R Ratio: 1.15 Divided T4
• Bearing Type: Ball Bearing
• Turbine Housing Flange: T4 Divided
• Footprint: Compact 42
• HP Capacity: Up to 1400 HP
• Garrett P/N: 880704-5004S

Performance & Application

The GTX4508R is built for race applications where extreme horsepower and boost tolerance are the priority. The ball bearing core delivers the quick response and durability advantages Garrett’s GTX-R series is known for, while the divided T4 turbine housing helps manage exhaust pulse energy for improved efficiency at high output. This is a turbocharger designed for builders pushing well beyond typical street power levels, where maximum flow and boost handling capability are non-negotiable. Its Compact 42 footprint makes it a practical fit for high-power builds requiring this level of capacity in a more manageable package.

Frequently Asked Questions

What HP can the GTX4508R support?

The GTX4508R is capable of supporting up to 1400 HP.

Is this a ball bearing or journal bearing turbo?

The GTX4508R is a ball bearing turbocharger, part of Garrett’s GTX-R ball bearing series.

What is the A/R ratio and turbine housing configuration?

This turbocharger uses a divided T4 turbine housing with a 1.15 A/R ratio.

What turbine and compressor wheel sizes does the GTX4508R use?

It uses an 87.0mm turbine wheel with 85 trim, and a compressor wheel measuring 108.0mm exducer / 79.8mm inducer with 55 trim.

For race-focused builds demanding the highest levels of boost and horsepower capability, the Garrett GTX4508R delivers proven ball bearing performance in a footprint built for serious power.