At 88mm the TNT488 is the top of the 400 frame — a journal bearing turbo supporting 1,520+ HP on your average sub-6.0L pushrod V8, with the same frame proven across LS and big-block swaps, 2JZ and RB inline-six builds, drag and no-prep cars, and high-horsepower diesel trucks.

It carries our newest compressor wheel and our 96x88 turbine wheel — the result of extensive research into relieving the backpressure that comes with maxing out the standard BW 96x88 design.

If you are choosing between this and the T6 version, the T4 suits builds already running a T4 manifold and works well to roughly 1,285 HP before turbine-side restriction starts to matter; the T6 has more inlet area for sustained high flow.

Key Specs

• 88mm compressor wheel, journal bearing
• 96x88 turbine wheel
• T4 flange, 1.25 A/R
• Rated 1,520+ HP on sub-6.0L pushrod V8 applications
• Built to order

Replaces / Cross-Reference

The TNT488 is a direct bolt-on replacement for S488 turbochargers and other 88mm S400-frame units. Built on the same 400 frame, it uses the mounting hardware you already have:

• Turbine inlet: T4 — fits your existing T4 manifold
• Turbine discharge: 4.62" (117mm) half marmon — same flange and clamp
• Compressor discharge: V-band, sized to your charge pipe
• Oil drain: 50.8mm (2.00") bolt centre, 12AN port — same drain

Full model mapping: S400 replacement cross-reference. More on the 88mm size: 88mm turbo guide.

Frequently Asked Questions

Is the TNT488 a direct replacement for an S488?

Yes. The TNT488 is built on the 400 frame, so it is a direct bolt-on replacement for S488 turbochargers. Your T4 manifold, half marmon downpipe flange, clamp, compressor discharge and 12AN oil drain all carry over.

What is the TNT488 T4 1.25 rated for?

1,520+ HP on your average sub-6.0L pushrod V8, using our 96x88 turbine wheel on a T4 1.25 A/R flange. The same frame is used across gas, import and diesel builds.

Should I choose the T4 or T6 version?

T4 suits builds already running a T4 manifold and works well to roughly 1,285 HP. T6 offers more turbine inlet area and is preferred for sustained high flow, sled pulling and dedicated race use.

Is this turbo built to order?

Yes. Every TNT488 is built to order.

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.