Flat

The twin-turbocharged 3.6L flat-six was rated at 408 horsepower when new. An engine-out service performed by Speed Gallery in 2019 included...

...flat-four is equipped with dual Zenith downdraft carburetors and was factory rated at 74 horsepower. The oil was changed in preparation for...

The bus is powered by a 1.5-liter flat-four paired with a four-speed manual transaxle and equipped with a retractable cloth sunroof, a split...

Powered by a 2.0-liter flat-four paired with a four-speed manual transaxle, the van is equipped with electronic fuel injection, PerTronix...

It is powered by a 2.7-liter flat-six mated to a five-speed manual transaxle and is finished in Light Yellow over Midnight leatherette...

This 2007 Porsche Cayman S was modified during previous ownership with a Flat Six Innovations-built 4.0-liter flat-six, which is mated to a...

It is powered by a 3.0-liter flat-six paired with a five-speed manual transaxle, and it wears a repaint in red over black leather. Equipment...

164ci flat four, dual carbs, auto, original colors, fresh restoration, drives out beautifully!

The car is powered by a 4.4-liter F102A flat-12 mated to a five-speed manual transaxle with a limited-slip differential and features pop-up...

The replacement twin-plug 3.0L flat-six is equipped with PMO carburetors as well as twin MSD ignition boxes and coils and mated to a 915...

This 1972 Porsche 911T coupe is a US-market example that is powered by a 2.4-liter flat-six paired with a five-speed manual transaxle.

This 1965 Porsche 911 coupe is finished in silver over black leatherette and is powered by a replacement 1.6-liter flat-four paired with a...

...in white over Blueblack upholstery and is powered by a mechanically fuel-injected 2.7L flat-six paired with a 915 five-speed manual transaxle.

The 1.6-liter flat-four feature a replacement aluminum case that was fitted with new components in 2005, and the four-speed manual transaxle...

...Ghia coupe is finished in black over black leatherette and is powered by an air-cooled 1.6L flat-four paired with a four-speed manual transaxle.

...in gray, refreshing the interior with gray leather upholstery, and installing a 2,332cc flat-four mated to a Rancho four-speed manual transaxle.

...convertible is finished in ivory over Brick Red vinyl upholstery and powered by a 1.2-liter flat-four paired with a four-speed manual transaxle.

This 1995 Porsche 911 Carrera cabriolet is finished in blue over gray leather and powered by a 3.6-liter flat-six paired with a six-speed...

...the cabin in green leather, and rebuilding the replacement 1.6-liter flat-four, four-speed manual transaxle, and limited-slip differential.

The 2.4-liter flat-six was rebuilt in 2014 by Axiom Motorsports, and it features 2.7L cylinder heads and Bosch K-Jetronic CIS fuel injection...

...by a 1,991cc Type 901/01 flat-six that breathes through twin triple-choke Weber carburetors and is mated to a five-speed manual transaxle.

...in Golf Blue, and the car is powered by a twin-plug 2.8L flat-six mated to a five-speed manual transaxle and a limited-slip differential.

The car is powered by a fuel-injected 2.4-liter flat-six paired with a five-speed manual transaxle and equipped with a removable roof panel, a...

This 1965 Chevrolet Corvair Corsa is finished in red over a matching interior and powered by a replacement turbocharged 164ci flat-six paired...

...flat-four paired with a replacement four-speed transaxle, and equipment includes 15″ steel wheels, a black soft top, amber fog lights, and a...