(FORTUNE Magazine) – They may be called stock cars, but the only "stock" parts on these handcrafted machines are the hood, roof, and trunk. The going rate for one of these babies is about $125,000. For that you get no doors, no passenger seat, no speedometer, and no headlights (they're decals). A typical Winston Cup car, like Dale Jarrett's No. 88 Ford (below), weighs 3,400 pounds and has a 700- to 750-horsepower engine that drives the rear wheels through a four-speed transmission. Top speed is around 220 mph. The tires contain an extra layer of rubber in case of a flat, and are fortified by a network of belts designed to maintain their shape under stress.

Of course the most eye-catching difference between stock cars and their showroom counterparts is that jazzy collage of logos representing team and Nascar sponsors--strategically placed for maximum TV exposure. Getting a spot on one of these high-speed billboards is not a cheap thrill. Take a look.

--Cora Daniels

Hood $4 million to $6 million Usually part of primary sponsor package, which includes rear-quarter panel and sometimes trunk

Roof and doors Reserved for car's number. No ads allowed.

B-post $75,000 to $150,000 Roll cage, made of 150 feet of steel tubing to protect driver

Front fender $30,000 to $100,000 Nascar sponsors

Lower quarter panel $25,000 to $100,000

C-post $250,000 to $750,000

Trunk and back of trunk* $500,000 to $1 million *Known as the TV panel because it can be seen from other drivers' in-car cameras

Behind rear wheels $200,000 to $600,000

Rear quarter panels $750,000 Usually an oil company

Goodyear is the exclusive supplier of tires for Nascar. Each tire costs $353. Depending on conditions, the average car may use six to 12 sets of tires per race, at a cost of up to $17,000. There's no tread because Nascar doesn't race in the rain.

Two 11-gallon rubber gas tanks are encased in steel for safety. Cars get 5 mpg.