Vehicle History & Overview

Chassis #9113103388, a 1973 Porsche 911, was purchased by the prior owner specifically to create an RSR "clone." In 2011, the car was transformed at renowned Porsche specialist Kundensport. A carbureted, "big-bore" 3.5L flat-six engine was selected to maintain the RSR character while still being suitable for the street. Weber 46 IDA carburetors, DC90 camshafts, larger valves, and ported/matched intakes highlight the engine upgrades. The 915 gearbox features upgraded internals to handle the extra power. Refreshed suspension and RSR-style Fuchs alloys wrapped with period-correct Michelin TB15 rubber create a solid footprint while Porsche 930 Turbo-based brakes bring everything to a halt. Interior appointments include the RS-style steering wheel, RSR-style roll bar, and aftermarket bucket seats with Repa harnesses. The selling dealer acquired this vehicle in August 2021.

The 1973 911 RSR was born of Porsche's desire to win against the likes of the Ferrari Daytona and DeTomaso Pantera in endurance racing. Exploiting the FIA rulebook, Porsche created the ultimate endurance sports car, based on the already-outstanding 911 RS. Notable changes for the RSR over the RS are widened bodywork accompanied by wider Fuchs alloy wheels, a larger and higher-revving 2.8L flat-six, brakes based on those from the mighty 917, revised suspension with greater adjustability, and a stripped interior framed by a roll-cage. The purpose-built RSR accomplished its mission on the track, with historic wins at the 24 Hours of Daytona, 12 Hours of Sebring, and the Targa Florio among others.

Modifications

This Porsche has been extensively modified, some details of which are listed below. An image of the upgraded engine is shown in the Modifications gallery as well as in the main gallery.

Exterior

• Steel RSR-style flairs

• Front and rear bumpers

• Fiberglass hood

• Fiberglass duck-tail

• Fuchs alloy wheel package

• Period-correct Michelin TB15 tires

Mechanical

• 3.5L flat-six engine

  • Donor Porsche 930 engine

  • Balanced stock crankshaft and connecting rods

  • Oversized 100mm cylinders and pistons

  • Weber 46 IDA carburetors

  • Larger valves, parts, and matched intakes

  • DC 90 camshafts

  • ARP hardware

• Rebuilt 915 transmission

• Refreshed suspension

• Upgraded braking system using Porsche 930 Turbo components

Interior

• RSR-style roll-bar

• RS-style steering wheel

• RS-style door-cards/pulls

• Aftermarket bucket seats

• Repa harnesses

• Various RS- and RSR-style interior trim components

1/6

Servicing & Documentation

Documentation of the build from Kundensport totaling $251,548 is included in the gallery below, as well as the main gallery.

1/2

Imperfections

Per the seller, the following imperfections are noted:

• Wear on floor coverings

• Wear on dashboard (the seller states that they will fix this for the next owner)

1/2

Included Items

• Kundensport build documentation, as shown in the photo gallery

Additional Information

The seller states the imperfections and/or wear on the dashboard will be addressed prior to delivery to the new owner.

Videos