Welded race car parts include the chassis, spoilers, seat brackets, and the rear end housings connected to the upper and lower control arms.

Because so much welding is necessary, often everyone in a racing fabrication shop has to be able to weld.

"The bodies are all steel and have to be all tack-welded together," said Jon Moore, fabricator/welder for Roush Racing's Busch Series shop in Milton Keynes. "At some point everyone has to do some kind of welding, whether they tack in place or get it all welded together."

But before striking an arc, motorsports fabricators also must know metallurgy. for example, although car bodies, inner crush panels, and the chassis are steel, more and more exotic metals are being used as well. This creates more challenges for welders.