K&n Air Filter 4"x14" on 2040-parts.com

Ariel Atom 700 is a turbo-supercharged 700-hp track weapon

If you're willing to ditch sleek supercar looks and just about every automotive creature comfort in the pursuit of pure performance, you might consider the Ariel Atom 3. Powered by a 2.4-liter Honda I4 engine cradled in an exoskeletonlike frame, the Atom 3 boasts a 0-to-60-mph time of just 2.9 seconds But maybe those performance numbers just aren't enough for you. If so, Piedmont, S.C.-based DDMWorks might have a solution.

Subaru introduces BRZ edition that's not an STI

News of a limited-edition Subaru BRZ might draw a logical conclusion that it's the oft-rumored, long-awaited STI version, with more power and a turbocharger and all the raucous driving potential the Impreza WRX STI carries. Sorry, folks. It's not an STI.

Shopautoweek.com iPad app takes car shopping mobile

If you've been reading Autoweek for the past year or so, you've no doubt heard us talking about our shopping site shopautoweek.com. It's designed to let enthusiasts like us (and most likely you) share car knowledge with regular car buyers, helping connect them with the best new car for their needs. Shopautoweek.com is already a great Web site; now it's a great iPad app.