Porsche obtained some memorable results — in terms of performance and customer satisfaction — by using air-cooled engines. And that was a milestone in automotive history. Enthusiasts are going crazy over air-cooled models, considering them the only real Porsches. The pros of the air-cooled design are the easier construction, less maintenance, and lower weight of the system compared to the liquid cooling system.

With time, the air-cooled engines left their place for liquid-cooled engines. These allowed the engine to release more horsepower without risking blowing up the entire block. However, companies like Singer Vehicle Design aren't messing with the water-cooled Porsches. They're on a mission to redesign the cars that came with air-cooled engines, and with the most sophisticated technology and materials, grant them the maximum possible amount of power. These are the most outstanding Porsche 991s Singer has reimagined.

Related: These Classic European Sports Cars Sold For A Small Fortune

8 The Pfaff Commission

via Singer Vehicle Design

Over the years, we've grown accustomed to the idea that restomod is the answer to the question "how can a classic be preserved and kept up with modernity?" What Singer has been doing, though, is something even more mind-blowing than simply replacing old mechanical components with brand-new ones.

via Singer Vehicle Design

Trim pieces that look like nickel-plated metal are actually 3-D printed then hand-polished to look like they were made 50 years ago. The gorgeous blue paint conceals carbon-fiber bodywork that massively drops the donor car’s weight. The upright headlights feature the latest lighting technology from Hella. Also, a touchscreen navigation and entertainment system flips out from underneath the woven leather dashboard.

Related: You Decide If This '64 Ford Falcon Rendering Could Be A Restomod Or A Modernization

7 The Rock Island Commission

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With the Rock Island, the aim of Singer Vehicle Design was to reimagine a 911 the way they think it should be. The incredible expense, effort, and technology hiding behind the first glance impression are what makes a Singer 911 so special.

via Singer Vehicle Design

The clean paintwork, woven leather interiors, a perfect stance are worth a lot of course, and it's barely imaginable to have those modifications done under $600,000. The spared-no-expense nature of every component justifies that astronomic price. Also, gearheads must consider the tremendous efforts made to make 400 hp from an air-cooled engine, and make it competitive with modern turbocharged water-cooled Porsches.

6 The Malibu

via Singer Vehicle Design

This very 70s Porsche 911 was reimagined by Singer back in 2016, and it's the 71st model built by the California-based company. At the rear of this beast lives Singer’s revised 4.0-liter six-cylinder boxer engine which has been mated to a six-speed manual transmission. Of course, it's air-cooled.

via Singer Vehicle Design

The 4.0L six-cylinder boxer engine produces 390 hp at a redline of 7,200 and this means it can sprint to 60 mph from a standstill in less than 3.3 seconds. Of course, that's far better than an original classic 911 could muster. The car is finished in baby blue "Mintarrini" color, and the interior has been finished in tan leather along with Alabaster stitching which has been woven into Recaro bucket seats.

5 The Norway

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One of the most beautiful examples of Singer's restomods is "The Norway." It introduces itself dressed in downplayed light green, almost a muted avocado hue, it also sees accents of dark olive on the stripes and a burnt dark amber for the script and Brembo brakes.

via Singer Vehicle Design

For those who are addicted to details, a quick look at this stunning unit is not enough. Everything looks so perfect on this car, starting from the more evident custom Fuchs rims, the chrome parts and frames to the hidden air-cooled engine which has been the object of thousands of hours of hard and meticulous work.

Related: 200-MPH Ferrari Testarossa Restomod Previewed By Officine Fioravanti

4 Charlottesville Commission

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The heart of the Charlottesville Commission is the 4.0L, naturally-aspirated, air-cooled flat-six engine. Singer Vehicle Design specifies that for this car the owner ordered a 6-speed manual gearbox and all-wheel-drive.

via Singer Vehicle Design

Externally, the carbon-fiber rear engine cover features raised black ceramic lettering and a discrete ‘inverse’ 4.0L badge. The carbon-fiber bodywork is finished in "Fish Silver" with nickel touring trim for the rear bumper. There are also ghosted stripes and black lettering, which give a sharp, serious, and balanced look for not-so-forgiving, wild 911.

3 The Cupertino

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The Porsche 911 has always been cool, but how about the 1965 Targa? Well, the removable top gave drivers that additional thrilling vibe of driving in the open air, and at Singer, they didn't hesitate to turn this model into a gorgeous restomod unit finished in Casablanca beige.

via Singer Vehicle Design

The 4.0-liter engine in this 911 Targa produces 390 hp and has been developed by Ed Pink Racing Engines to pin drivers to the back of the seat. The classy paint (which was stock during the '80s for Porsche 930) and the air-cooled flat-six make this car a real pearl for gentlemen only.

2 The Manchester

via Singer Vehicle Design

Singer names its vehicles after the location the car is destined for, which in this case is Manchester. In fact, besides the fancy interior — which could perfectly match with a tweed jacket — you can also spot the right-hand drive trim.

via Singer Vehicle Design

The Manchester is powered by a 4.0-liter flat-six engine courtesy of Ed Pink Racing. That engine is then coupled with a six-speed manual transmission driving the rear wheels through a limited-slip differential. Helping to ensure the car corners as well as it accelerates, Singer has installed custom adjustable dampers from Ohlins.

1 The DLS

Singer Vehicle Design

This Singer production is a 911 that is absolutely mind-boggling. Officially named "DLS", which stands for "Dynamics and Lightweighting Study", this work of art is built on a Porsche 911 base (specifically a 964 from 1990) represents the maximum expression of Singer Vehicle Design in the pursuit of air-cooled perfection, going well beyond its "classic" restorations, which has recently passed 100 units.

Singer’s 1990 Porsche 911 “DLS”
Singer Vehicle Design

The DLS is equipped with a 4.0-liter six-cylinder boxer engine, with titanium valves and double overhead camshafts. It can rev up to 9000 rpm, delivering 500 wild horses. Formula 1 inspired throttle bodies with double injectors and extensive use of magnesium and composite materials make it a real racing engine. Mated to a 6-speed racing gearbox, this car really embraces Singer's philosophy: take a Porsche 911 and turn an already successful car into a timeless high-performance beauty.

Next: These Are The Most-Produced Sports Cars Of All Time