the Greater Miami

Porsche Community

Since 1979


Porsche Service, Repair & Rebuild


GP AutoWerks is a Miami-based Porsche service, repair & rebuild shop with 30+ years Porsche experience. From general maintenance to factory spec or custom engine and transmission rebuilds, "GP" offers comprehensive mechanical services to care for your classic or contemporary Porsche.

       Looking for a Porsche shop in the Miami area that provenly knows Porsche? Browse this website to learn more. You're also welcome to stop by the shop to see what's going on first hand. From just a bit of shop talk, you're bound to gain new insights to help maximize the performance & pleasure you get from your Porsche. 

What makes GP AutoWerks unique


Here, you know exactly who's working on your Porsche and what their credentials are. Conversation before, during, and after work's done on your car is with the one actually working on it, not a service manager / middle-man. Test drive? With the one who set up your Porsche. Wrap all this with the highest caliber Porsche service, repair & rebuilding you'll find, include my low overhead... that's what I have to offer you. I'm George Perdomo, the "GP" in GP AutoWerks. I'm the founder, owner and solo Porsche practitioner here.

       Proven Porsche quality from 30+ years experience, consistent timely delivery, appealing cost efficiency, and NO middle-men. If this werks for you, I'm here for you 305-588-0874. English & Spanish spoken fluently.

What's in this website


You'll find in-depth content in this website explaining the capabilities available to you at GP AutoWerks. Main areas covered in this site are:

Porsche Engine & Transmission Rebuild 

Porsche Brakes & Suspension / Handling

Porsche Body Werks

Porsche Interior

Porsche Modification & Restoration

Porsche PPI


You'll also see Porsche "Factoids"---information on Porsche history and cars. There's also a few videos to further your insight into Porsche performance. My hope is you'll find all the content herein informative & entertaining. Want to comment on content? Please do---text me at 305-588-0874. I promise not to use your number to solicit your business unless you specifically ask me to contact you, which I of course invite you to.


Porsche service & repair photo gallery


Photo Gallery shows snapshots taken while service, repairs & rebuilds are being performed on customer cars. Each photo is captioned so you'll know what you're looking at.  See Photo Gallery



The most simple---yet often set aside---service is oil & filter changing. You'll find best-practice service intervals for your particular Porsche model & oil type in the "Best-Practice" page.   Know oil change intervals

Short tale of a long run


My mechanical career began in the early seventies. Was mid eighties when I became a Porsche specialist. Looking back, and by most professional standards, that's a long run... and it continues. The vast mechanical knowledge-base I've acquired encompasses both street and race-track Porsches. You can learn more about my background---my Porsche credentials---by visiting:  Credentials  

What you get


Having your Porsche serviced or repaired to factory or better standards, within the time frame promised, on budget, and with no BS... that's what you'll get. This in mind, here are some preliminary notes on Porsche and some introductory content on the capabilities available to you at GP AutoWerks. You can jump to more in-depth content by clicking on whatever titled-topic interests you. There are also blue links:

Click on photos to enlarge.

Porsche 4-speed transmission from model 930 is apart allowing gears, sliders, dog teeth, and syncro rings to be inspected
New Porsche syncro ring at left is rough compared to old at right that is worn smooth
New and old Porsche transmision dog teeth compared to each other

Porsche transmission is opened to inspect gears, sliders, dog-teeth and syncro rings for wear. Worn syncro rings and 2nd gear dog teeth are reason this transmission is being serviced. Center: Compare new, rough syncro ring on left to worn-smooth ring next to it on right. Far right: New dog teeth on left compared to removed part on right. Once this transmission is installed, with new syncro rings and 2nd gear dog teeth, my customer will find it shifting like new. 

Porsche engine with head removed reveals 2 broken head studs marked in yellow

Broken head studs are marked in yellow. There are 2 on this side of engine and 2 on other side. All existing, old studs will be removed from engine case and new ARP studs installed. ARPs will last indefinitely.

Porsche front suspension focusing on control arms and control arm bushings
Profile of 1974 white Porsche Carrera parked on sloping Rocky Mountain road shows car's lowered ride height relative to optimal high speed handling

Top: Relatively new Porsche with suspension bushing issues made for very poor handling. New bushings return handling to optimal.

Bottom: Customer's lowered '74 Carrera driven from Miami to and through the Rockies. While this depth of lowering allows this Porsche to handle as if on rails---which is precisely what the owner likes---for street purposes this makes for a stiff ride. More, with just inches of clearance, driver's eyeballs need to be constantly GLUED to the pavement ahead. This is NOT a setting I'd advise a casual Porsche driver to go for.

Customer's silver Porsche Targa wrongly parked in body shop work area with driver-side door, front hood and front bumper removed from car... car's door by itself lays on table in foreground with side mirror and door handle removed
Profile of silver Porsche Targa after completition of body work showing door nicely painted and correctly installed

GP AutoWerks does not do paint & body work. 

I supervise this type of work for my customers ensuring it being done to Porsche standards. Look at top photo and see what's wrong there before reading on. The body shop was immediately advised it being unacceptable to leave this Porsche's hood and interior open while this car was in any work area of theirs---dust getting into every nook & cranny being the issue. (This is customer chosen body  shop.) I required this shop to plastic-seal this car's openings and, in the end, clean both frunk and interior of the car to the like-new condition it was in prior to it arriving for refinishing. After this Targa left P&B, it came to GP AutoWerks where I made final adjustments to hood and door positioning.

Posche interior being serviced by George Perdomo with him making repair to dashboard
Restored all-black Porsche interior looking from passenger's side towards driver's side

Porsche's interior is apart for a restoration. Am dealing with electrical system issues at this moment. Seating was rebuilt and recovered in top grain leather, new dash and headliner were installed. A stock look was maintained throughout this Porsche according to my customer's requirement. 

Bottom of competition Porsche piston showing skirt window modification
Small LED display screen showing Porsche logo on black background is digital modification to customer's air conditioning control
Scale model of Porsche engine lid air intake seen in profile view is modification to fit car model 911
Graphic diagram shows wiring modification to Porsche electrical system for digital AC control

Customer Porsche modifications in various stages of development.

Passenger-side exterior view of restored 1979 Grey on black Porsche 930 with car parked outside in wide open space and under beautiful sunlit condition

Customer's Restored 1979 Porsche 930. 

Porsche Engine & Transmission Rebuild

The Porsche flat format engine---boxer type engine---is unique among car engine's based on two main factors. First, the pistons are horizontally opposed. In affect, one side of pistons is said to be “boxing” the other side (given the pistons moving directly against each other.) Secondly, early model Porsche's were unique on the basis of being air cooled. This distinction arose from Ferdinand Porsche's original weight reduction interests and simplified manufacturing requirements for the initial Porsche racing car... series 356. In 1998, the last of Porsche's air cooled engine-cars were made. The company has since moved from air to water cooling. The last car Porsche produced with air cooling was supposedly purchased by Mr. Jerry Seinfeld.

      While other auto makers crafted engines, transmissions, and chassis for the sake of retail sales, Porsche's beginnings were racing-oriented. On this basis, their engines & transmissions were, from the outset, designed and made to be light-weight, powerful, and durable. The focus being to compete and win. The first iteration of Ferdinand Porsche's vision was the model 356. To this day, a few of these original 1950 circa Porsches remain on the road.


GP AutoWerks offers comprehensive Porsche engine & transmission service, repair & rebuild capabilities. From the simplest tuning of your Porsche's fuel air mixture, oil and filter changing, spark plug replacement, ignition wire replacement, valve adjustment, to checking cylinder sealing efficiency via compression and/or leak-down tests (and from that being able to advise you if the rings, intake or exhaust valves are leaking for any given cylinder), to the complete factory-standard (or better) rebuild of your Porsche engine & transmission... my shop can expertly address any need you have in this area. 305-588-0874

To Porsche Engine & Transmission Rebuild page.

Porsche Brakes & Suspension / Handling

Much of the Porsche experience is about how a Porsche handles. And not to be critical of front engine Porsches, it's the original positioning of the engine and transmission to the car's rear that is at the root of why a Porsche feels & handles---for the most part---as it does. Of course there's much more to consider: geometry, weights & distribution, aerodynamics, suspension, ride height and tires. These are just a few of the ingredients that comprise what creates the handling experience of a rear engine Porsche. On a performance scale, Porsche ranks among the top handling cars ever. This is not coincidence. It comes from Porsche's dedication---from the very beginning: to race... and win.

What do You want in terms of handling from your Porsche? If you're not sure, talk to me. I'll help you answer this interesting question. If you know, I can help you understand your Porsche's current status and what's required in order to achieve the handling you want---be it for street or race track. 305-588-0874  To Porsche Brakes & Suspension / Handling page

Porsche Body Werks

Porsche body design is like no other---the 911 form being classic. And to think, Porsche once considered replacing the 911-type in their product line with the 928. This decision was based on Porsche's thinking at the time that, with the introduction of the 930, nothing more could be done with the 911 platform. Corporate leadership subsequently changed at Porsche. And so to did the future of the 911 platform---it continued and has become the iconic body symbol of Porsche. An icon among sports cars.


Correcting body damage from accidents or otherwise is NOT what GP AutoWerks does. The role I play in regard to Porsche body work is two-fold: First, I serve as a consultant answering questions as to what mechanical damage may have occurred from an accident---body shops should not be relied upon to diagnose Porsche mechanical issues. Of course I offer the capability to repair any mechanical damage and will co-ordinate my shop's work with whatever body shop you choose to work with. Secondly, I'm experienced in the alterations that you may want to make to your Porsche's body. Flares, spoilers/wings, etc. Body alterations for the sake of either aesthetics and/or performance driving. Within reason, nothing is impossible with your Porsche. It's a matter of creativity, and expert engineering and build-ability as I'm pleased to bring to the table. 305-588-0874.  To Porsche Body Werks page.

Porsche Interior

A Porsche interior is one of the finest in the market for a sports car of its' class. Everything is ergonomically designed with today's Porsche interiors keeping pace with features found in most luxury sedans.

Your Porsche's interior, in Miami the hottest topic is air conditioning. More to the point, AC that delivers cold air from the vents. You'll find a good deal of AC information in the Interior page.

       If your interior is worn, or not to your liking either aesthetically or in regards to some ergonomic consideration, I'm here to help sort that out for you. Bear in mind, my shop does not do reupholstering. My role---when called for---is to disassemble parts for reupholstering... supervise the reupholstering work if needed/wanted... then reassemble interior parts. Doing so, I ensure your interior is completed both aesthetically and mechanically as it should be. 

        Perhaps a simple interior-related adjustment is all your Porsche needs. Or, an interior part needs repair or replacement. Whatever the case, I know your Porsche inside & out. Being as particular as I am---if I do say so myself---I'll attend to whatever interior needs your Porsche has with the same precision given the engines I rebuild. 

         If You have physical considerations that require specific interior adjustments be made to your Porsche for personal comfort, I can help You. This concerns interior adjustments that are beyond the scope of the adjust-ability built into your Porsche's controls. Such adjustments may include but not be limited to seat position, seat form, steering column positioning, shifter positioning, seat belts/harnesses, and roll cage structures. To what degree these areas of your Porsche's interior can be modified requires discussion between us.  To Porsche Interior page


Porsche Modification & Restoration


When this website refers to Porsche modification, that refers to alterations from a car's stock configuration to non-stock. This can be be for performance and/or aesthetic reasons. In this realm, I create and make changes according to customer-inspired ideas of all sorts. If you have a vision you want to see come to life on or in your Porsche, I'm interested to see it too. If you want me to come up with the idea(s) for you..... can do.

       Restoration is just that, restoring a Porsche to some level of its original form and condition. This may encompass part or all of a car. The work I do in regard to restoration is specifically guided by my customer's interests in what is to be accomplished, the desired timeline, and what will be invested. To this end, all is defined in advance to ensure customer and I are on the same page before any work begins.  To Porsche Modification & Restoration page

Porsche PPI

PPI is the acronym for Pre-Purchase Inspection. It refers to the professional inspection made of a given Porsche for the purpose of knowing what condition the inspected car stands in. And so, what costs may be anticipated to eventually achieve the condition level a potential buyer wants. Bottom line: PPI enables a Porsche buyer to make an informed decision concerning the potential purchase of a pre-owned Porsche.

To Porsche PPI page


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Peorge Perdomo kneeling next to black Porsche while performing Porsche PPI

PPI in progress.



GP AutoWerks

Shop Address

4551 SW 71 Ave.

Bay #1, Miami, FL





the Greater Miami

Porsche Community

Since 1979


Notes, Disclaimers

& Credits

GP AutoWerks is an independent Porsche service & repair shop located in Miami, Florida, U.S.A. Serving both street and race track enthusiasts, GP AutoWerks provides a full range of Porsche mechanical capabilities from simple adjustments to comprehensive engine and transmission rebuilding for both classic and contemporary Porsches. Porsche, the Porsche crest, and Porsche car model names are under licensed use by Porsche Cars North America, Inc. (PCNA) from the owner Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Porsche AG ("Porsche.") No association or affiliation with Porsche, PCNA or AG is intended or implied by GP AutoWerks who happens to

specialize in service, repair, PPI, modification and restoration of Porsche vehicles. Videos shown are Porsche productions presented for educational & entertainment purposes only. Permission for presentation is on file. Thank you.

Photos of Porsche service & repair, including engine & transmission rebuilds, brakes & suspension, body werks, interior, modification & restoration, and PPI work including parts and cars depict the property of GP AutoWerks' customers. All such images are used in this website with the expressed permission of GP AutoWerks' customers.  Thank you.

Photography, unless credited otherwise, is © 2015-2020 Karl Hansen. All rights reserved.

Photo captions are provided to reflect photo content and credits appear where due.


Website © 2020 Karl Hansen. All rights reserved.


Happy Porsche driving! And remember to please buckle up because being glad you did is a wonderful thing ~~~

GP AutoWerks

Independent Porsche Service, Repair & Rebuild Specialist

Porsche: Tune Up, Oil Change, Engine Rebuild, Transmission Rebuild,

Brakes, Suspension, Alignment, Corner Balance, Air Conditioning, PPI