This 1970 Porsche 911S Twin-Plug is a rare, competition-prepared example that combines vintage racing pedigree with street-legal equipment. One of just 572 Porsche 911S models produced, this example was originally imported new to Ohio, where it remained with its original U.S.-based owner until being purchased and imported into Canada in 1996. In the early 2000s, the Porsche was converted into a 1973 911 RS-style vintage racer, receiving 8-inch steel fender flares and an extensive selection of competition-oriented components while retaining the equipment necessary for street use. Headlights, horn, muffler, windshield wipers, and a parking brake remain fitted, creating a distinctive combination of race-prepared capability and road-going functionality. Finished in Grand Prix White with Martini Racing-inspired vinyl livery, the Porsche presents with an unmistakable period competition appearance. The race-inspired cockpit features a custom roll bar, competition-style interior, and racing bucket seats finished in Martini Racing livery. Additional competition details include externally accessible electrical shut-off switches and custom-fabricated exhaust outlets. The car has been professionally curated and developed over the years by knowledgeable Porsche specialists and a dedicated multi-Porsche private collector. Its preparation includes careful chassis setup and corner balancing to within ±4 lbs. With approximately one-quarter tank of fuel and no driver aboard, recorded corner weights are 381 lbs. front left, 394 lbs. front right, 717 lbs. rear left, and 673 lbs. rear right, for a total weight of approximately 2,065 lbs. Accompanying documentation adds significantly to the car's history and includes the original warranty book and title, Porsche Classic GmbH certification, a CASC/FIA logbook, miscellaneous receipts, and a detailed component description sheet. The competition logbook documents eligibility for GT, Historic, and G70 class racing. Combining the desirability of the early 911S with period-inspired RS styling, twin-plug specification, extensive competition preparation, Martini Racing presentation, and documented history, this lightweight Porsche offers an exciting opportunity for the enthusiast seeking a distinctive vintage racer with street-legal equipment.