For 1988-2000 Chevrolet C2500 Air Lift Leveling Kit Rear Firestone 29238djjt on 2040-parts.com

Porsche Panamera Diesel (2011) first official pictures

Like the Porsche 911 GT3 RS 4.0? Then this new Porsche Panamera Diesel probably isn't the car for you – it's the cheapest and most economical Panamera yet. The new Panamera Diesel is also Porsche's second-ever diesel model, joining the Cayenne in Porsche's oil-burning range.

2015 BMW M4 Convertible debuts: drop-top fun priced from $73,425

The 2015 BMW M4 Convertible made its official debut at the New York auto show yesterday. While the details of the high-octane hardtop didn't exactly catch us off-guard (see our full breakdown here), we now know how much it'll cost to feel the wind in your hair as you launch from 0-60 mph in 4.4 seconds: $73,425, to start. Complete pricing will be available closer to the M4 Convertible's sale date, which is “late summer” 2014, according to BMW.

2013 Audi RS6 Avant: 190mph & 0-62mph in 3.9 seconds

The 2013 Audi RS6 Avant has been revealed with a V8 552bhp Twin Scroll Turbo delivering 0-62mph in 3.9 seconds and up to 190mph. The 2013 Audi RS6 Avant comes with a 552bhp version of the twin-scroll V8 found in the latest, most powerful Audis (and the Bentley Continental GT V8) which, despite being 28bhp down on the power of the old V10 RS6 (although it does have 37lb/ft more torque – 516lb/ft) can get to 62mph in a supercar-bashing 3.9 seconds and, in standard guise, 155mph. But spend more than the £77k Audi will want for the new RS6 Avant by opting for the Dynamic Package and top speed increases to 174mph.