Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

2015 Chevrolet Corvette Z06 details leak, and it's going to have 620 hp and 650 lb-ft of torque

We won't get a complete look at the specs of the 2015 Chevrolet Corvette Z06 until it makes its official debut at the upcoming Detroit auto show, but a web coding blooper means we get a sneak peak at some of its vital stats before the reveal. Specifically, it's set to get 620 hp and 650 lb-ft of torque -- a big boost over the 450 hp and 450 lb-ft of torque the base 'Vette enjoys. How did this happen?

AutoWeek office swag: Mazda rotary-engine keychain with realistic motion

When I got the keys to our long-term 2011 Mazda 5 last week, they came with a surprise--this aluminum-and-brass keychain in the shape of a rotary-engine housing, complete with moving rotor. The rotor doesn't just rattle around or spin in a circle. Thanks to a thumbwheel on the back of the housing, coupled with a timing gear and offset crank journal, the thing actually moves in an approximation of epitrochoidal motion just like a real Wankel.

One Lap of the Web: 'Blower' Bentleys, Abarth history and a Checker taxi-camper

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- When it comes to high-dollar collector cars, provenance is everything.