TNT492 – 92mm T6 Journal Bearing Turbocharger

Need a 1,755+ HP capable 400-frame journal bearing turbocharger for grudge racing, no-prep, or extreme street builds? The TNT492 has been redesigned with our all-new 92mm 12-blade billet compressor wheel, delivering an even broader powerband while maintaining the airflow required for four-digit horsepower.

Replacing our previous 7+7 compressor wheel, the new 12-blade design was engineered to improve response, increase operating range, and provide exceptional drivability without sacrificing top-end performance. Whether you're chasing ETs at the track or building a high-horsepower street machine, the TNT492 is designed to keep pulling hard throughout the RPM range.

The TNT492 features our proven 103x92 turbine wheel, developed through years of research to reduce the backpressure commonly associated with maxed-out GT50-based 99x92 and 102x92 turbine combinations.

The result is a turbocharger that accelerates the rotating assembly more efficiently, builds boost quickly, and continues flowing where many comparable designs begin to fall off. The combination of our new 12-blade compressor wheel and high-flow 103x92 turbine delivers the broad power curve and top-end performance serious racers demand.

Key Specifications

• All-new 92mm 12-blade billet compressor wheel
• Journal bearing center section
• 103x92 high-flow turbine wheel
• T6 flange with multiple A/R options
• Supports 1,755+ horsepower
• Broad powerband with excellent response
• Designed for grudge racing, no-prep, and extreme street applications
• Built to order

Replaces / Cross-Reference

The TNT492 is a direct bolt-on replacement for S492 turbochargers and other 92mm units on the 400 frame. It uses the mounting hardware you already have:

• Turbine inlet: T6 — fits your existing T6 manifold
• Turbine discharge: 5.75" (146mm) marmon — same flange and 99502-0588 clamp
• Compressor discharge: V-band, sized to your charge pipe
• Oil drain: 50.8mm (2.00") bolt centre, 12AN port — same drain

At 92mm the TNT492 sits above the 88mm units at the top of the S400 range. If you are stepping up from an S488 or comparable, expect a higher ceiling with a correspondingly later spool — our 12-blade compressor and 103x92 turbine are designed to narrow that gap.

Full model mapping: S400 replacement cross-reference. Housing selection: S400 turbine housing and A/R guide.

Frequently Asked Questions

Is the TNT492 a direct replacement for an S492?

Yes. The TNT492 is built on the 400 frame with a T6 flange, so it is a direct bolt-on replacement for S492 turbochargers. Your T6 manifold, 5.75" marmon downpipe flange, clamp, compressor discharge and 12AN oil drain all carry over.

What is the TNT492 rated for?

The TNT492 is capable of supporting 1,755+ horsepower, depending on engine combination, fuel type, boost level, and supporting modifications.

What's new with the compressor wheel?

The TNT492 now features our all-new 92mm 12-blade billet compressor wheel. Replacing the previous 7+7 design, it was engineered to deliver a broader, more usable power curve, improved response, and the airflow required for extreme horsepower applications.

What makes the 103x92 turbine wheel different?

Our 103x92 turbine wheel was developed to reduce the backpressure commonly found in GT50-based 99x92 and 102x92 turbine designs. The result is quicker rotor acceleration, improved efficiency at high power levels, and stronger performance throughout the RPM range.

Power ratings on this page are quoted in crank horsepower (HP). Figures previously published in wheel horsepower (WHP) have been restated using our in-house tested conversion — the hardware and its capability are unchanged.

BorgWarner and S400 are trademarks of BorgWarner Inc. Black Sheep Industries Inc. and True North Turbos are not affiliated with or endorsed by BorgWarner Inc. Model designations are used for identification and fitment reference only.