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

Lotus offers supercharger kits for the Elise and the Exige

Lotus enthusiasts looking to wring a little more power out of their rides now have a potent option: a supercharger kit for the Elise and Exige models. The kits boost power in the naturally aspirated versions from about 189 hp to 218 hp and improve torque from 133 lb-ft to 155 lb-ft. Even better, this added power comes on quicker, with peak torque coming on at 5,000 rpm, rather than 6,800 rpm.

Vintage photos show Ford Mustang I and the elusive XD Cobra

It's hardly surprising that our readers want to share their memories of the Ford Mustang -- 50 years is a long time for an automotive nameplate to endure, and the model's upcoming 50th anniversary is as good excuse as any to look back on the experiences that have made the car an enthusiast hit. Take William Drew, who had a close encounter with pony car history when he saw the Mustang I concept, plus a rare Ghia-bodied Shelby Cobra concept, at an auto dealer in Dallas in 1970. His slides (taken with a Yashica camera, he notes) show the unusual cars in the nice, bright colors of Kodachrome.

Concept Car of the Week: Pininfarina CNR-PF (1978)

In the 1970s alarm bells were ringing in the energy sector as a series of energy crises and rising fuel prices spiralled. The car industry was forced to produce a new generation of more efficient cars and designers were putting new models through wind tunnels to optimize their aerodynamic performance to reduce aerodynamic drag. Some pushed the limits further than others and none more so than Pininfarina, which designed a car that slipped through the air twice as efficiently than any other.