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1989 Porsche 930 Turbo Slantnose Cabriolet G50 M505 Low Mileage

Make: Porsche
Model: 930
Type: Convertible
Year: 1989
Mileage: 5,863
VIN: WP0EB0936KS070543
Color: Red
Cylinders: 6
Fuel: Gasoline
Transmission: Manual
Interior color: Black
Drive side: Left-hand drive
Vehicle Title: Clear
Item location: Oskaloosa, Iowa, United States

1989 Porsche 930 Additional Info:

1989 Porsche 930 Slantnose Cabriolet

Note: Make sure to watch the videos at the end of the description

If you are in the market for a WERKS 930 Cabriolet…..This is probably the car you have been waiting for!! I purchased this car from my father’s estate/Automotive dealership called Action Performance about 4 years ago. This example has the significance of coming from a single source of ownership, notable rarity, all original accessories, and some pretty impressive provenance that most other examples have lost over time.

This vehicle was ordered and purchased new by my father. It was picked up European delivery and had about 3500 miles put on it as an overseas delivery. After that it was driven fairly infrequently over the years to the present mileage of 5863 miles (which may increase slightly as I take it for some short drives on these increasingly nice days of Spring).

My Dad, Dr Jack Frost MD was a renowned collector and was notably one of the earliest people to recognize the potential collectible value of certain vehicles. He was best known in the Corvette, Muscle Car and Ferrari circles due to his extensive abilities to see the collectable value of certain vehicles. He was a true enthusiast as he was also one to enjoy the vehicles and to use them respectfully. He cherished the way that they were produced at the factory and carefully preserved their originality. He was truly a master of finding rare factory options and desirable combinations of features. All of his vehicles were professionally maintained and stored in a temperature and humidity-controlled environment. This Porsche 930 Slantnose Cabriolet was no different, having been stored in his personal warehouse with the company of Ferrari Daytonas, numerous C2 Corvettes, a GT40 (P/1059) and various significant Muscle cars.

Since his death in 2007 the collection has been slowly released to the care of others who no doubt recognizes the importance of the vehicles and will cherish them as well. Many of which have become top examples of originality and well documented investments.

In his bid to find the perfect Porsche (The only Porsche that he would ever own), he waited patiently to be able to order what he felt was the most significant Porsche of the era. Since you have read this far, you are probably aware of the rare and exotic nature of the WERKs Slantnose production. More importantly you likely recognize the very small number of these cars that were optioned with the G50 5 speed transmission (only in 1989). This makes this particular Porsche an exceptionally rare example within an infinitesimal number of rare examples.

I won’t pretend to know the exact number of 1989 Sonderwunsch (special wishes) 930 G50 Cabriolets are out there…. mostly because the numbers vary from source to source. We can probably agree that the likelihood of seeing another one of this caliber for sale soon….is probably pretty slim. This article puts the number at 28….is that accurate? I honestly don’t know. The article is however a nice homage to the cars idiosyncrasies that some find endearing and others find maddening or even dangerous. Love it or hate it, It certainly stands out in a crowd.



Porsche at the time did not keep very good records of the WERKs production vehicles. In fact, there is a very long thread on the Pelican Forums that has been very helpful at tracking the available documents concerning these vehicles. Dad was very good at collecting documents and we are fortunate to have some impressive provenance including his personal correspondence with the Porsche factory concerning his purchase and European delivery. Of Course, included with the purchase will be numerous documents (Including the Certificate of Authenticity) and even some pictures of their trip.

In addition, a picture of this car was featured in an article about Dad in Medical Economics where it was discussed his approach to collecting and the recognition of upcoming values. Dad viewed this car as a driver and did so over the years. Part of the reason that this vehicle was spared many miles was that very shortly after this cars purchase….he bought a 1990 Corvette ZR1 and the combination of being a “Corvette guy” and a coupe, ended up spending more time with the Corvette (I know....what a crime, right?).

Originality and Revitalization:

At the time of my purchase, the car had not been significantly driven since the time of my father’s death in 2007. Basically, it had sat idle for more than a decade in a climate/humidity controlled environment. My oldest brother who was the caretaker of the collection had recently passed away so we were unsure exactly when the last time the car had been run. As a mode of precaution, I elected to allow experts revive the car and made no attempts to even start the car. After getting in line for about 1 year, I was able to transport the car to StallTek in Wellman Iowa (if you are not familiar with them….they offer premiere restoration of older Porsche vehicles and are well respected within the Porsche community). It was under their considerable expertise that the car was inspected and “revived”. The worklist is included in the photos so you can see what things were done in order to bring the car back to pristine condition.

We were even treated to a surprise when the car first went on the lift and were pleased to find the inspection markings still intact and that the car still has significant coverage of Cosmoline on the undercarriage where it was applied prior to shipping to the United States. Simply a testament of how original and gently this car was used.

The car is absolutely original with the following exceptions. There have been no accidents, Damage or Flaws other than that listed below.

Paint: There were a few very small paint chips that Stalltek expertly repaired on the hood and rear flares. As I recall, these occurred during the European trip during the leg through Scotland.

Tires: I am not sure what brand the original tires were (probably Pirellis, the COA does not specify) but according to the date codes on the current tires….they appear to have been replaced a few months after the European trip with BF Goodrich T/A’s. He probably replaced them after the wear from the trip (he was that way). The car now wears brand new set of Toyo Proxes R888s (roughly 3 years old at the time of this writing). The “original” set of tires is included with the sale should the new owner prefer a period set of tires on the car.

Mods: There has been a small but significant (and easily reversible) modification made to the fuse system. Basically, a modern fuse hack has been applied to the fuses that run the fuel pumps. This has made startups considerably 100% reliable in the humid Iowa weather.

Starting Module: For the sake of reliability, the original CDI ignition module was rebuilt to factory specs.

I have personally driven this car since the revival and (as you can see in the video below) am very comfortable taking it on fairly long drives with no concerns of mechanical issues....it seems to be very well sorted. You will notice that the photos are not the typical glamour shots that you would typically see in this type of car, The car was not professionally detailed for this photo session....I pulled the car out of its climate/humidity controlled garage and took the pictures within a week of this auction....same with the videos. There has been no alterations to the photos....the car is as it appears everyday. What you see is what you get....an honest representation of a special automobile.

The fine print:

Inspection: We encourage a personal inspection before purchase and will do our best to accommodate your schedule.

Presentation: The car has been accurately presented to the best of my knowledge. I have been personally involved with this vehicle since it was new. If you are aware of the importance of this vehicle and have done your homework, there should be no surprises for the buyer so bid with confidence. This virtually the last of the vehicles from Dr Frosts collection.

Reserve Price: I will not disclose the reserve price but if you watch the last video, that should give you an idea of where it is. Keeping in mind that while that car was slightly lower mileage, this example has the rare G50 5 speed manual.

Included as well:

· A set of WERKS Floor mats (These are the only floor mats)

· Custom Car cover

· Factory Car Care kit (I would not expect the contents of the bottles to be any good though…nice display item)

· Factory Tool set

· Factory Air Compressor

· Manuals

· Emergency Reflective Triangle

· Factory 1st Aid Kit

· Factory Wind deflector (Goes over the seats…appears to have never been used)

· Tonneau Cockpit cover (appears to have never been used)

· Tonneau cover for soft top when down (appears to have never been used)

· Several pieces of factory optional fitted luggage with Porsche logos that were actually used on their European delivery trip. These are in very good…but “used” condition.

All documentation, Dr Frosts personal correspondence with the Porsche factory, Misc. provenance and COA as displayed.


· Warranty: I am the personal owner of this vehicle. There are no other entities representing myself or this vehicle. While I wish you to completely comfortable with your purchase, please understand that there is absolutely no warranty included with this vehicle (Either written nor implied). I want you to be completely comfortable with your purchase which is why we will allow a personal inspection after the auction before you accept the car. Essentially, if you do not like what you see, you are relieved from any requirement to buy the car.

There are a few conditions though….

1) Once accepted and paid for….the car is the responsibility of the buyer or his/her agent.

2) Deposit: The winner of the Auction will pay a refundable $2000.00 deposit through Paypal within 48 hours of the auctions conclusion. The $2000.00 deposit can be refunded if the cars condition proves to be unsatisfactory to the new buyer. Note: The buyer (or his agent) must physically/personally inspect the car in order to get the down payment refunded. In short, there will be no refunds of the deposit for “Buyers Remorse”. There will be no refunds once the car leaves this residence, inspected or not.

3) Payment: Full Payment will need to be received and verified before the car will be released to its new owner.

4) Test Drives: Lets call them "Test rides" Weather permitting, I will take prospective buyers for a drive in the car to show that everything functions well. Obviously, due to the value of the car....you get to drive it, when you own it.

5) I do not need your assistance with selling the car. This will be a direct transaction from myself to the winner of the auction….I do not care if you are a Nigerian prince with too much money or other such nonsense.

Contacting me: If you would like to discuss the condition of the car or have more questions, please feel free to contact me through the eBay message center. Make sure to leave your name, a phone number, time zone and an idea of when is a good time to call. If your location is outside of the USA, we will work out a good time for you to call me.

Please remember:

1) I am not a Porsche expert….I only know about this car as the average enthusiast, I am not any sort of Porsche historian or mechanic.

1989 Porsche 930 Slantnose Cabriolet - YouTube

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1989 Porsche 930 Slantnose Cabriolet Walkaround - YouTube

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