Mazda Sentia 1995 Rear Muffler [5522500] on 2040-parts.com

Autoweek in review: Win a Chrysler 300 SRT, the new Viper under $100K, and we play with an Aston Martin

Want a chance to win a Chrysler 300 SRT? Of course you do. The Autoweek America Adventure is a road trip you'll never forget—and it may even be your path to 300 SRT ownership.

McLaren MP4-12C Revealed

McLaren has released details of their new supercar - the McLaren MP4-12C Known for so long by its code name – P11 – this MP4-12C is the first real McLaren since the legendary F1. And on the face of it it certainly looks like it has enough to offer to stand proud as the inheritor of McLaren’s reputation for exceptional road cars. Not scheduled to go on sale until 2011, the MP4-12C is aimed at the heart of Supercar sales, expected to go on sale at a price a small notch above the latest offering from Ferrari – the 458 Italia – at around £160,ooo.

Suburban Terror: Hennessey offers upgrade packages for GMC SUVs

Lest you think that Hennessey Performance Engineering will only tune up your Dodge Viper or Cadillac CTS-V, feast your eyes on this little number showing one of the company's souped-up SUVs taking on a 2011 Nissan GT-R. It's really an unfair fight: The Cadillac Escalade sports a 6.2-liter V8 which in stock form makes about 400 hp. But Hennessey, not looking for a beatdown, drops a twin-turbocharged 427 cubic-inch LSX engine with high-flow cylinder heads, intake and exhaust upgrades, a performance camshaft and a laundry list of other parts to bring the truck's output to 1,000 hp.