1975 Porsche 911S 2.7L Flat-Six Engine

Engine Number: ☆6450739☆

This 1975 Porsche 911S 2.7-liter flat-six engine represents one of the most iconic air-cooled powerplants of the mid-1970s, celebrated for its rev-happy nature, distinctive sound, and unmistakable Porsche character. Produced specifically for the 1975 Porsche 911S, this engine delivers authentic period performance while remaining highly desirable among collectors and restorers.

The engine is equipped with dual Weber 40 IDA 3C1 carburetors, providing sharp throttle response and a classic mechanical driving feel. Reliability upgrades include hydraulic chain tensioners, enhancing durability and long-term operation. The engine bay presentation is elevated by powder-coated engine tins, paired with functional heat exchangers for efficient thermal management.

Supporting components such as the cooling fan and shroud, MSD ignition coil, distributor, alternator, and flywheel complete this well-rounded package, making it suitable for restoration projects, engine replacements, or performance-focused classic builds.

Key Features

• Genuine 1975 Porsche 911S engine

• 2.7-liter air-cooled flat-six configuration

• Engine Number: ☆6450739☆

• Dual Weber 40 IDA 3C1 carburetors

• Hydraulic chain tensioners

• Powder-coated engine tins

• Heat exchangers

• Cooling fan and shroud

• MSD ignition coil

• Distributor, alternator, and flywheel included

Ideal For

• Porsche 911S (1975) restorations

• Period-correct performance upgrades

• Classic Porsche collectors and enthusiasts

This 1975 Porsche 911S 2.7L engine delivers timeless air-cooled performance, mechanical purity, and unmistakable heritage—an excellent addition to any classic Porsche build.