Spec Miata Build Process

The process begins with sourcing the proper donor car.  Our 25 plus years of experience enables us to obtaining the right car with the correct options.

We begin by stripping the car to a bare rolling chassis with all unnecessary items removed from the interior, exterior, engine bay, etc. A custom welded cage is fabricated and TIG welded for each car and consists of 8 mounting points, triple Nascar style side intrusion bars, DOM tubing and high end SFI padding . The cage design and safety equipment is the same for every car and easily fits driver's up to 6 feet 8 inches in height. Our least expensive builds have the same cage that our top shelf cars would have.  The driver floor and a portion of the transmission tunnel is modified as allowed by the rules for more room and solid platform to mount the race seat on.  The style and depth of this modification is tailored to each driver's needs and seat choice.

 The interior, roll cage structure, engine bay and trunk are painted a uniform grey in our in house downdraft paint booth. 

Next is the interior to focus on after it's fresh paint job. Here we install the driver race seat along with camlock harnesses, Sparco suede steering wheel, , quick release for the steering wheel, additional gauges, window net, fire system, solenoid master cut off switch, and air bag delete plate. We even use a section of high grip coating underneath the pedals to finish it off for clean professional look. Optional items can consist of creature comforts like cool suits to timing components like AMB transponders and AIM data systems and cameras

The suspension kit is the source of all the fun in racing a Spec Miata. It is by far one of the best handling vehicles in the world and has been made even better by a proven combination. This combination consists of Penske shocks all around, Eibach 2.5 inch 700 LB front springs, Eibach 2.5 inch 325 LB rear springs, and Eibach sway bars with poly mounting bushings.  During the installation, every control arm is cleaned, inspected in a JIG and powder coated  as well as both front and rear subframes. All wearable items like bushings, tie rods, wheel bearings are replaced with OEM Mazda parts during the reassembly process with ARP wheel studs added.  Front offset lower balljoints as allowed, are installed.  The power steering is removed and the rebuilt steering rack is fitted for that perfect feel in your hands while on track.

The braking system while simple in design, has proven time and again to be up to the task of hard wheel to wheel racing. For example many teams that compete in 12 hour endurance races do not change brake pads! Factory calipers are blueprinted along with their e brake mechanisms removed for low drag, with new vented front rotors, new rear solid rotors, Hawk performance pads, Stainless steel brake lines and a full liter of ATE brake fluid.

The entire drive train is then inspected and removed. Unless a Pro built Engine is chosen from one of our many partners, all major services are completed to the engine like timing belt replacement, water pump, coolant hoses, idler and tensioner pulleys, front and rear crank seals, along with a fresh set of NGK plug wires and the proper NGK spark plugs. 1999-2005 model year cars have the mandated SCCA restrictor plate installed.  A stainless steel high flow exhaust system made by Kooks racing is installed which has the best fitment along with meeting most sanctioned race event sound requirements.

The transmission is rebuilt and blueprinted for maximum reliability, low drag and quick shifting, while a fresh clutch assembly is bolted to a resurfaced flywheel with a new throwout bearing and pilot bearing. Redline synthetic fluids are used wirthin the transmission for the best in wear and low drag.

 Finishing off the drive train is the rear differential with an OEM factory limited slip unit in a race prepared aluminum housing with all new seals. The proper final drive ratio is installed and set up for cars that did not come from the factory with it. Optional items are either Mazdaspeed clutch type limited slip units or Torsen style limited slip units as an upgrade for 1990-1993 cars. 1994-2005 cars will all ready have a rebuilt Mazda Torsen style limited slip unit installed as part of their base build.  Special gear oil sourced within the states made to our specs is used in all the differentials.

Optional drivetrain items range from big hp professional built engines, high capacity cross flow aluminum radiators, to different clutch choices to name a few. 

The rolling chassis then has it's exterior completely professionally wrapped your choice of color for a clean and professional look.

Final inspection including a complete nut and bolt check of the complete Spec Miata suspension, brakes and drive train is performed. New lightweight 15 x 7 wheels are installed with new Hoosier or Toyo tires. The car is scaled with your weight added and aligned.

The car is then tuned on our chassis dyno to optimize both HP and Torque output while optimizing ignition timing and fuel curves.



The cars are very easy to maintain. During the weekend checking the lug nut torque, oil levels and air pressures are the norm. In between events the fluids should be changed. All cars come with a complete setup guide with alignment specs, air pressures, water temp and oil pressure readings, fluid recommendations, and a pre-event checklist.

The checklist will have all major points to be checked after an event which will list the location, size of socket needed and torque rating.



The time needed to complete varies but usually is 12-16 weeks depending on current workload.



Current market pricing for donor cars currently ranges from $4,000-$6,500.

The OEM hardtop which is needed typically costs $2000-$2,500

1990-2005 car builds excluding the donor car and hardtop, start at $33,950



While our entry level builds will get you on the track, there are many choices, as stated before, like engine options, wild exterior wrap designs, extra wheels and tires, upgraded clutches, different style seats and much more. We can accommodate specific requests and help guide the new owner to building the best Spec Miata including a Runoffs winning car. Below is pricing to the more popular options that can be added.

All labor and materials are included in the pricing below.

AMB transponder +$499

Passenger seat with matching harnesses (for right side coaching/passengers for hpde style events) $2499 and up 

 Cool suit  +$1099

Pro Built motor - expertly built to the highest standards in the U.S. to the very limit of the rules +$8499

Pro Built Cyl head only  +$3999

Spare wheels and Hoosier or Toyo tires +$1799 per set

Full AIM data acquisition systems - varies based on display and amounts of channels integrated and monitored. Typically costs are $5,250-$6,750 with pricing varying on amount of sensors and camera integration.

Multi tone exterior wrap / satin / metallic colors  - varies by design, please contact us for a formal quote.  A single solid gloss color wrap is included in the base price.