This 1999 Porsche 911 GT3 is one of 1,858 examples of the 996.1 generation produced and was built for the Italian market. It is finished in Speed Yellow over black leather and features various Manthey modifications, including KW coilovers and upgraded six-piston front brake calipers. Power comes from a 3.6-liter Mezger flat-six linked to a six-speed manual transaxle with a limited-slip differential, and the car also has 18″ two-piece wheels, Recaro bucket seats, and a roll bar. Further modifications include a vented front bumper cover, a carbon-fiber intake, a revised engine tune, a single-mass flywheel, and an aftermarket exhaust system with headers. The car was brought to the US and acquired by the current owner in 2025, and it now has 54k kilometers (~33k miles). This 996.1 GT3 is now offered on dealer consignment by 911r—a BaT Local Partner—with manufacturer’s literature, partial records, a clean Carfax report, and a clean Montana title.

Porsche’s line of GT3 road cars debuted in 1999 with the release of the 996.1 model, which was offered worldwide except for in North America. Each was built without a sunroof and featured a manually adjustable rear wing and additional aerodynamic elements to increase downforce. This example left the factory finished in Speed Yellow (L12G, L12H) and has been fitted with a vented front bumper cover as well as Manthey decals on the windshield and side skirts.

The ca rides on 18″ two-piece alloy wheels, and Manthey KW coilovers and six-piston front brake calipers have been installed along with various other upgraded suspension components. The seller reports that Michelin Pilot Sport tires were installed after the photos were taken.

The interior is outfitted with Recaro bucket seats trimmed in black leather as well as a yellow roll-bar, center console, and seatbelts. Black leather covers the dash and door panels, and further details include automatic climate control, a CDR-22 stereo, and a fire extinguisher.

The three-spoke steering wheel frames a GT3-branded central tachometer flanked by a 300-km/h speedometer and gauges for coolant temperature, fuel level, oil pressure, and voltage. The digital odometer indicates 54k kilometers (~33k miles).

The 3.6-liter M96/76 Mezger flat-six is linked to a six-speed manual transaxle with a limited-slip differential. A carbon-fiber intake has been installed, and the seller notes that the car has an aftermarket tune and a single-mass flywheel.

The car is equipped with an aftermarket exhaust and headers. Additional underside photos are provided in the gallery below.

Decoding the option sticker reveals the following information:

  • L12H– Speed Yellow paint
  • 42 – Black Interior
  • C07 – Version for Italy
  • 197– Stronger battery
  • 375 – Two-way power-adjustable sport seat, left
  • 376 – Two-way power-adjustable sport seat, right
  • 424 – CD storage compartment
  • 441 – Radio preparation
  • 539 – Mechanical seat-height adjustment, left
  • 540 – Mechanical seat-height adjustment, right
  • 567 – Top-tinted windscreen
  • 571 – Activated charcoal filter
  • 573 – Automatic air conditioning
  • 581 – Front center console
  • 695 – Becker-Porsche CDR-22 stereo
  • 981 – Leather dashboard and door panels

The Carfax report is free of accidents or other reported damage from its first entry in January 2026.