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

Saleen Sneak Peek

With the magical five-point-oh menacingly back on the quarter panels of 'Stangs, it didn't take long for tuners to saddle up performance steeds for 2011. Saleen Performance has goosed the 2011 Mustang GT with a slew of enhancements to create the S302, including a shorter-throw six-speed manual, optional brake upgrades that measure 14 inches with six-piston calibers and a Racecraft suspension that lowers ride height by 1.5 inches. The exterior gets rockers, a scooped hood and front and rear fascia, which are complemented by a redone interior with piano-black finishings.

BMW 4-Series Coupe concept [w/Gallery]

The BMW 4 Series Coupe concept will make its debut at next month's NAIAS in Detroit, when it will become the first model to wear the new 4er badge as it distances itself from the 3 Series sedan. While billed as a concept it is believed to be virtually production-ready. It offers little in the way of surprises in the wake of the F10 3 Series and larger 6 Series with traditional short front and long rear overhang proportions.

Concept Car of the Week: Renault Espace F1 (1994)

Co-developped with Matra, the Renault Espace was launched in 1984 and pioneered the now very popular minivan/MPV segment. The second-generation version appeared seven years later by which time the competition all had developed competitors. 1994 marked the tenth anniversary of the Espace as well as Renault's third Formula 1 championship as an engine supplier.