Legacy Metrics

1978 Porsche 911 (G-body, gProgramm custom build)

9118300972roadGermany
Engine
3.4L air-cooled flat-six, twin-plug, Weber downdraft carburetors, 320 hp, paired with 915 five-speed manual
Colour
Slate grey

A 1978 Porsche 911 (G-body) comprehensively transformed by Long Island-based specialist gProgramm, this car — nicknamed 'Mercy' — is the second example the builder completed. The conversion included a bare-metal respray in Slate Grey, a twin-plug 3.4-litre 320 hp engine hand-built to blueprinted specification, 986 Boxster brake upgrade, adjustable coilovers, bespoke interior with tartan trim and a 917-style gear knob, and Fikse Fuchs-style wheels. In 2017 it participated in a cross-country promotional drive to Luftgekühlt 4 and was featured on the Smoking Tire 'One Take' series.

Ownership

  1. Auction sale
    Estimate US$225,000 – US$275,000

    RM Sotheby's catalogue lot →

Competition

  1. 2017
    Luftgekühlt 4

    One of three gProgramm-built 911s that completed a roughly 3,500-mile drive from New York to California, culminating in attendance at this event.

Maintenance & restoration

  1. Restoration
    gProgramm

    Full bespoke build by gProgramm: body media-blasted to bare metal, rust-proofed, and painted Slate Grey; fuel filler relocated; fog lights added; Fikse Fuchs-style wheels fitted; 986 Boxster four-piston brake upgrade installed front and rear; Leistung Package with adjustable coilovers, aluminium rear trailing arms, upgraded sway bars, and new bushings fitted.

    This was the second complete build produced by gProgramm; the car carries the nickname 'Mercy'.

  2. Engine rebuild
    gProgramm

    3.4-litre twin-plug engine fully disassembled, blueprinted, balanced, and hand-assembled before installation; fitted with Weber downdraft carburettors, twin centre exhaust, and stainless heat exchangers.

    Engine rated at 320 hp and paired with a 915 five-speed manual gearbox; transmission tunnel left exposed and polished.

  3. Maintenance
    gProgramm

    Interior comprehensively rebuilt with bolstered leather racing seats featuring tartan inserts, Schroth four-point harnesses, matching tartan door cards, 350 mm Momo Prototipo steering wheel, gProgramm tachometer, 917-style wood gear knob, German wool square-weave carpets, and a roll bar.

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“Full” and “partial” documentation labels indicate how well each entry is corroborated in the underlying sources, not an audit of the car’s physical paperwork. Names of recent or living owners are withheld for privacy.