When I was a new classic Porsche owner I always would constantly surf the internet, looking for vastly rich examples of how to better modify my Porsche. Call it a sickness, but I remember being up till the wee hours of the morning looking at parts such as interesting oil coolers, fog lights, cold air filters, wheels, suspension, and brake upgrades till my fingers go numb and I started seeing cross-eyed. My brain would wow and flutter to uncontrollable spasms at staring at the options of exhaust muffler, reusable oil filters, pistons and cylinders, CV parts, jacks, diagnostic tools and even the huge selection of Porsche propaganda paraphernalia that not always gets connect on the car. How many car enthusiasts before me would also be after the perfect ride? There are hundreds of thousands of web articles, thousands of books, hundreds of car magazines, dozens of car museums the would cover the subject in building the best ride. With all of that in mind, how does one think about upgrades and changes?
During the heyday of Porsche driving in the 70s, classic cruising include the modify for larger wheels, changing of bumpers, switching seats, and upgrading out shocks/brakes/suspension systems. If conversion were left up to consumer, often the result would less than desirable. 
In some cases, come severe upgrades makes some Porsche unrecognizable.
Factory Porsche leave the factory perfect for consumer-ship in a thirsty American market. The American Market, however were not one’s to leave “perfection” alone. While some Porsche was used for street, others were used weekend racing or full out racing. It didn’t take Porsche that long to recognize that this American market needed a supplement owners manual to help them do so. Porsche would then have upgrade techniques and options that would allow these conversations. The idea was almost coined, drive your 911 to work Monday through Friday, and use your car for the track on weekends. There were even full page advertising showing owners
In some cases, notable race car drivers would be featured to drive events, drawing more buyers into a more insatiable market. These cars would be stripped down and whatever it would take to give them edges in making the faster, it was done. Its hard to hide the fact that all Porsche models are passenger cars. Driver comfort then would be removed to reduce track times. The car would go on a major diet, removing leather door panels and carpeted flooring surfaces. It was some much of a need to promote the illusion of speed, at one point, even Porsche offered bolt – on modifcations at the dealership that could share with you ways to customize your vehicle for track use with all the possibilities of returning to factory setup or your own option to customize your car to your personality. This personalization included changing out items such as wheel, tires, window tinting, stereos, headlights, steering wheels, engine swaps, suspension and braking upgrades and extra roll cage upgrades. The changes say a particular customization measured and often suggested by either a dealership or by regulations set by race clubs. While some of the kinds of changes do not affect the car’s performance to regular street driving others could change the car to handle off-road, drag racing, track and autocross.
Therefore, Porsche cannot simply be just any form of transportation.
The owners, unlike the extreme spectrum of drivers everywhere, cannot be simply pegged into one kind of user. Thus there are truly many kinds of owners, whether it’s a tuner, a teenager, the business CEO, or that little old lady from Pasadena. Most importantly, it’s also that particular balance act of needing a measurement.
The measurement, would be making your car ideal for a specific need.
Its having to keep up a bit of ritual, such as how not to lock yourself out of your car’s potential. I suppose with enough money and energy you could win races if you have a great drive and the ability to keep a keen eye on maintenance. It’s mostly the older school Porsche that need you more than you need it, customizing your street driving is all about making an excuse getting in the thing, to go somewhere… far…very far. All of the street modifications you might bolt on your car might be rendered useless unless you drive the thing. As the trend returns the car to how the factory intended it, maybe those guys in Stuttgart did get it right the first time around. If you have means to be given a choice for any Porsche restoration, go factory.
The Porsche Independent Repair 