Imitation, the sincerest form of flattery

Porsche offered a slantnose or flachbau ("flat construction") version of the 911 Turbo from 1982 following the build of a handful of prototype cars during 1980 and 1981. Early versions of this factory-built special were built on a 'special request' basis. The model originates from a time when wealthy customers wanted road-going 911 models that imitated the look of the successful Porsche 935 race cars. Kremer Racing and DP Motorsport had already started supplying converted 'slantnose' specials, and in 1981 the factory was commissioned to produce a '935 Street' for Mansour Ojjeh, the head of TAG. This car became the first official product of the new 'Special Wishes' program (Sonderwunsch Programm), and was the project that gave momentum to the 930 flachbau or slantnose conversions built by Porsche from 1982 to 1989.

This site charts the history of these rare cars and brings together my social media channels, the 911Flachbau Facebook page and the 930SE Instagram feed, sharing content on all Flachbau variants from owners, enthusiasts and the classic car markets.

The @930SE Instagram Feed

Buyers Guide - Bodywork


Buyers Guide


Bodywork Check-points

Whilst all 911s after 1976 were galvanised, the youngest slantnose models are at least 30 years old, and can suffer from poorly repaired accident damage, and rust. The ‘widow-maker’ moniker is less applicable to the later 930s however the cars still caught out many that had never previously experienced 300+ bhp and 80s turbo lag.

Body damage is a possibility. Check the consistency of shut lines around the car. Remove the carpet in the front trunk / boot space and inspect the panelwork and boot floor for signs of accident damage or creasing. In particular, check behind bumpers, and alignment of valance for panel damage. Review areas around popup lamps for stress cracks and paint damage due to badly aligned lamp pods.

Also check the underside of the floor pan for damage due to inappropriate jacking of the car - note: genuine Turbo S / Turbo SE models have jacking point extension tubes where boxed sill covers/rocker covers were fitted.

Bodywork Inspection on a Porsche 911 Slantnose


Check for rust:

Inspect the inner and outer wings around lights and bulkhead flanges. All slantnose wings are very expensive to replace so thoroughly check for damage.
Check inner sills and jacking points. Inspect door pillars and shut panel (kidney bowls) - mud collects from the wheels and rusts out the slam panel around the striker bar for the door locks and down to the sills. Check the fuel filler area from the top and underside. Inspect the battery tray area / front seam – battery acid and water ingress from leaking seals can cause rust. Carefully check the areas around the windscreen seal on the front scuttle (a window out repair). Water ingress here can cause electrical fires.

Get underneath the car and check the lower side of the fuel tank for damage or rust (most exposed area). Inspect the condition of the aluminium bumpers and bumper rubbers. Note that the rubber filler insert to the front side lamps is specific to the Turbo SE models (Hella square side lamps), and the mountings for the rubber inserts can rust out.


This buyers guide has been split into the main topic areas as follows:

911 Flachbau Buyers Guide

Interior and Electrics

Mechanics and Suspension


Further information can be found on the Flachbau Forensics page offering a guide to authenticity (how to spot a fake flachbau). is not associated, approved, endorsed nor, in any way, affiliated with Porsche Cars Great Britain Ltd., Dr. Ing. h.c.F. Porsche, AG ( or any of its subsidiaries. The Porsche® name and crest are trademarks of Dr. Ing. h.c.F. Porsche AG, and any other products mentioned are the trademarks of their respective holders. All images used belong to their respective owners and are credited where such information is available. Any mention of trademarked names or other marks is for purpose of reference only. No warranty is offered relating to the completeness or accuracy of any content provided on this website.

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