The ON3 Performance 78mm Turbocharger has quickly become a popular choice for the single turbo V8 market, offering strong horsepower capability, excellent airflow, and outstanding value for builders looking for a large-frame turbocharger without premium-tier pricing.

Designed for serious street and race applications, this turbo has proven itself across multiple high-horsepower combinations. It has been successfully used in single turbo V8 setups running deep into the 9-second range, while twin turbo applications have also shown strong performance in even more aggressive builds.

Built to support 800+ RWHP in properly matched applications, the ON3 78mm is an excellent option for larger cubic-inch engines where controlling exhaust backpressure becomes increasingly important.

Larger Turbine Wheel Advantage

One of the biggest advantages of this turbocharger is its 75mm turbine wheel, paired with a large 78mm compressor wheel.

Many comparable turbos in this size range use smaller 65mm or similar turbine wheels, which can become restrictive in higher horsepower applications. The larger 75mm turbine helps improve exhaust flow, reduce backpressure, and support stronger top-end power while helping reduce the risk of overspeeding the turbocharger under demanding boost conditions.

This also makes it a great upgrade for builders currently pushing the limits of the popular ON3 76mm turbocharger, especially when moving to higher horsepower or larger displacement combinations.

Features & Benefits:

• Large-frame 78mm turbocharger
• Supports 800+ RWHP in properly matched applications
• Excellent for single turbo V8 builds
• Great option for larger cubic-inch engines
• Larger 75mm turbine wheel helps reduce backpressure
• Strong top-end airflow and improved high-RPM efficiency
• Helps reduce turbo overspeed in demanding applications
• Excellent upgrade over smaller turbine wheel turbo combinations
• Strong street and race performance capability
• Outstanding value for high-horsepower applications

Compressor Side Specifications

• Compressor Wheel: 78mm
• Compressor A/R: .80
• Compressor Inlet: 4.0"
• Compressor Outlet: 2.5"
• Inducer: 78mm

Turbine / Exhaust Side Specifications

• Turbine Wheel Exducer: 75mm
• T4 Turbine Flange
• .96 A/R Exhaust Housing
• 3.0" V-Band Outlet

Recommended Applications

• Single turbo V8 performance builds
• Larger displacement engines
• High-horsepower street builds
• Drag racing and race-focused applications
• Excellent upgrade from smaller-frame 76mm turbo combinations

The ON3 Performance 78mm Turbocharger is a strong choice for builders needing higher airflow, improved exhaust efficiency, controlled backpressure, and proven horsepower capability—all while delivering exceptional value in a large-frame turbocharger platform.