The veil of secrecy surrounding the super Lexus LS that we captured testing on the Nürburgring racetrack last week has started to fall apart.

Today, along with a fresh batch of scoop pictures of the hotted up LS, our spy photographers also sent us a shot of a spec sheet that’s been circulating on the internet and which we were also informed about from the guys over at the Clublexus fan site.

Here’s what Mike from ClubLexus told Carscoop:

“We had an insider at the old F1 Toyota facility snap photos of this LS and what looked like a modified LFA GT2 with BBS wheels, widened fenders….they snapped photos of the specs for the LS…it stated 650hp at 9,000 RPM with 20″ wheels. Within hours of the pics posted, we got a message from Toyota to take the pics down, which we did.”

“What makes me believe this is accurate is Lotus stated they were going to use a 650hp 5.0 liter from the Lexus IS F supercharged for 650hp. The Lexus GS F is coming to so it might be a mule for that.”

The spec sheet itself is from TMG, which is an acronym for Toyota Motorsports GmbH, the Japanese firm’s high-performance testing and development facility located in in Cologne, Germany.

On TMG’s official website the about page reads: “Specialising in high technology, TMG is a wholly-owned subsidiary of the Toyota Motor Corporation and offers its services to external clients as well as members of the Toyota family.”

The information sheet says that the car is named the Lexus LS TMG Edition and that it comes equipped with a 5.0-liter engine, but makes no word if it’s naturally aspirated or turbocharged, nor if it’s a V8 or an LFA-based V10.

What it does say is that the 5.0-liter unit maxes out at 9,000 rpm and that it delivers an output of 650-horses (478kW) and a peak torque of 710Nm (524 lb-ft).

It adds that the car tips the scales at 2,070kg (4,564 pounds), rides on 20-inch wheels shod in massive tires size 295/35 up front and 345/30 at the rear, and that it completes the 0-100km/h (62mph) sprint in just 4.2 seconds on its way to a top speed of 320km/h (199mph).

While we still don’t know if it’s a limited production model, a racing car, or a conceptual exercise, based on this latest information, we wouldn’t be surprised if we saw the Lexus LS TMG Edition making its world premiere at the upcoming Tokyo Motor Show in December.

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