
1990 Porsche 911 · Singer Turbo Study
Singer Turbo Study born in May 2025, with a 3.8-liter twin-turbo flat-six, 503 hp, six-speed manual, rear-wheel drive, PTS Azzuro Thetys Metallic, Boomerang leather, carbon-fiber bodywork.
257 mimanual
Developed in collaboration with Williams Advanced Engineering with technical consultation from Hans Mezger and Norbert Singer, DLS represents Singer's extreme pursuit of naturally aspirated lightweight performance. Capped at 75 numbered commissions.

Program engineering
A bespoke 4.0-liter naturally aspirated flat-six featuring four valves per cylinder, dual overhead camshafts, titanium connecting rods, and dual injectors per cylinder, revving past 9,000 rpm to make 500 hp.
Engineered using extensive aerodynamic simulations to eliminate front-axle lift, incorporating an integrated roof channel directing air to the rear ducktail spoiler and an underbody diffuser.
Extensive magnesium and titanium metallurgy, a bespoke Hewland six-speed manual in magnesium casings, and Brembo CCM-R carbon-ceramic brakes bring vehicle dry weight down to 2,180 lbs.
Live listings

Singer Turbo Study born in May 2025, with a 3.8-liter twin-turbo flat-six, 503 hp, six-speed manual, rear-wheel drive, PTS Azzuro Thetys Metallic, Boomerang leather, carbon-fiber bodywork.
257 mimanual
Tatooine commission, Singer Vehicle Design order #174, finished in Blue Blood over Cognac leather with custom weave inserts. Its 4.0L engine, Ohlins suspension, carbon roof, roll hoop, and Singer A and B services are documented.
219 mimanual

Offered by Graham Rahal Performance in Zionsville, Indiana.
855 mimanual
Wolf Blue Metallic.
89 mimanual

Singer Classic Turbo “Chappy” commission in PTS Aga Blue over bone leather, with the 3.8L twin-turbo flat-six, carbon-fibre body and roof, carbon-ceramic brakes, front lift system, and adjustable sport suspension.
476 mimanual
Weimaraner Grey Metallic over Monza Onyx.
275 mimanual
Closed listings
Prior appearances GarageScout has attached to this builder beyond the live set.

Singer “Elroy” commission with an Ed Pink 4.0-liter flat-six, paint-to-sample Tangerine Orange over black, and documented hand-crafted construction. Features include Öhlins suspension, Brembo carbon-ceramic brakes, limited-slip differential, and a six-speed manual.
791 mimanual
2,267 mi
PTS: Casablanca Beige Metallic over Chocolate Brown woven.
14,158 mimanual
300 mi

The 2019 build was repaired after a 2022 rear-end collision, with salvage-title and mileage discrepancies disclosed.
4,800 mimanual
1,162 mi
1,484 mi
7,821 mi
55 mi
8,449 mi
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