Genuine Garrett 685HP Detroit Series 60 14L Turbocharger | 79mm Billet | GT47 Performance Turbo

Detroit's "Secret Turbo Menu" Just Keeps Getting Better

If you've followed Momentum Worx for any length of time, you've probably heard us talk about Detroit Diesel's "secret turbo menu." While most people think every Detroit Series 60 came with the same turbocharger, the reality is far more interesting.

Over the years, Detroit and Garrett produced several factory turbochargers that were never widely known outside OEM applications. This is one of those hidden gems.

Originally released as the factory turbocharger for select 685 HP Detroit Series 60 14.0L engines, this brand-new Genuine Garrett turbo packs serious hardware that most standard Series 60 turbos simply don't have.

It features a 79mm x 108mm boreless 6+6 compressor wheel, a high-flow GT47 turbine wheel, and an aggressive 1.27 A/R wastegated turbine housing. The result is outstanding throttle response, excellent spool-up, and significantly greater airflow than the typical GT42-equipped Detroit Series 60 turbocharger.

This isn't an aftermarket copy or rebuilt unit—it's a brand-new Genuine Garrett turbocharger built to OEM standards.

Why This Garrett Turbo Is Different

Most Detroit Series 60 turbochargers were designed around smaller compressor wheels and GT42 turbine assemblies. This Garrett unit steps things up considerably while maintaining excellent drivability.

Factory 685 HP Garrett Turbo

Originally engineered for high-output Detroit Diesel applications, giving you OEM reliability with substantially increased airflow.

GT47 Turbine

The larger 93mm / 84mm GT47 turbine wheel improves exhaust flow while supporting higher power levels without excessive drive pressure.

Tight 1.27 A/R Housing

Despite the larger rotating assembly, the compact 1.27 A/R wastegated turbine housing helps the turbo spool quickly, delivering impressive throttle response and strong mid-range power.

Boreless Compressor Wheel

One of the coolest engineering details is Garrett's boreless compressor wheel design. Instead of using a traditional center bore and retaining nut, the compressor wheel threads directly onto the turbine shaft.

While this design isn't intended to create additional horsepower by itself, it demonstrates Garrett's premium engineering and results in an exceptionally robust rotating assembly.

Turbocharger Specifications

Compressor Wheel

• 6+6 Blade Design
• 79mm Inducer
• 108mm Exducer (OD)

Turbine Wheel

• GT47 Turbine
• 10 Blade Design
• 93mm OD
• 84mm Exducer

Turbine Housing

• 1.27 A/R
• Wastegated

Features & Benefits

• Genuine Garrett OEM turbocharger
• Brand new, never remanufactured
• Factory 685 HP Detroit Series 60 turbo
• Larger 79mm compressor wheel
• High-flow GT47 turbine wheel
• Quick-spooling 1.27 A/R wastegated housing
• Boreless compressor wheel technology
• Excellent upgrade for performance Detroit Series 60 builds
• Outstanding balance of spool-up, airflow, and drivability

Applications

Designed for select Detroit Diesel Series 60 14.0L 685 HP applications.

Also commonly used as a performance upgrade on other Detroit Series 60 engines seeking increased airflow and improved turbo response. Please verify your existing part number or contact Momentum Worx before ordering.

Cross Reference / Interchange

This Genuine Garrett turbocharger replaces or interchanges with the following part numbers:

23535347, 23535348, 7613020001, 761302-0001, 7613020002, 761302-0002, 7613025001, 761302-5001, 7613025001S, 7613025002, 761302-5002, 7613025002S, 7613029001, 761302-9001, 7613029002, 761302-9002, 761302-5001S, 761302-5002S, E23535347, E23535348, R23535347, R23535348.

Why Buy From Momentum Worx?

At Momentum Worx, we specialize in heavy-duty diesel turbochargers and know the Detroit Series 60 platform inside and out. We don't just sell part numbers—we help customers find the right turbo for their horsepower goals, driving style, and application.

Whether you're restoring a factory 685 HP engine or upgrading your existing Detroit with one of Garrett's lesser-known OEM performance turbos, this is one of the best factory combinations ever produced.