Microsoft has sent through word all-new free content is available today for Forza Motorsport 4 in the form of the 2013 SRT Viper Download Pack.

The 2013 SRT Viper Pack includes a drivable version of the SRT Viper with exterior and cockpit views, which highlight the car’s powerful on-track performance. Additionally, Turn 10 Studios worked with SRT to craft a brand new Autovista experience that highlights the car’s incredible features and details the model’s production history. As with the rest of the cars in Autovista for Forza Motorsport 4, fans will be able to explore and interact with the car using only their hands with Kinect or with their Xbox 360 controller.

You can find the new content on the Xbox Live Marketplace for Forza Motorsport 4. If you grab it, drop us a line with notes on your Viper driving experience.

While that other big-name racing franchise was spinning its wheels in what seemed like an eternally delayed development cycle, Microsoft and Turn 10 Studios' Forza Motorsport kept on rolling and this month marked the launch of the fourth iteration, aptly titled Forza Motorsport 4.

AusGamers resident auto-enthusiast Amos Hong has been busy test-driving Forza 4 for us and you can read all about his rather positive findings in this in-depth review.

Forza Motorport 4 is now available, exclusive to the Xbox 360.

When the gaming community was calling out for Kinect support to be introduced into more core-gaming experiences, rather than just the casual focus we've seen for the device's launch, we don't think this is quite what they had in mind.

Following the game's reveal at last weekend's Spike Video Game Awards, Microsoft and Turn 10 have released an official press release for Forza Motorport 4 that -- while not offering much info about the actual game -- boasts support of the recently released hands-free motion controller.

“Forza Motorsport 4” will be the most expansive and vividly realistic automotive experience across any console, bringing you closer to the edge than you’ve ever been before. Through the power of Kinect, players will be able to step through the TV screen and jump into the driver’s seat while the engaging controller-based experience will let you take on the bone-jarring physics, unparalleled levels of customisation, and rosters of dream cars and tracks.

What specifically that means is anyone's guess. But let's hope it comes in the form of some useful motion-gestures or head-tracking to augment the physical-controller experience, rather than requiring Kinect-using racers to hold their arms out in front of them like a milk-maid for race after race.

A handful of announcement screenshots purported to be in-game can be found on our new Forza 4 game page.