Rp-212 Rp212 Stoltz Polyurethane 12" Straight Roller, 5/8" Id on 2040-parts.com

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.

Audi Q5 concept is killer

Audi has provided the strongest hint yet that it plans to crown its Q5 lineup with an RS model by revealing a one-off, 408-hp, supercharged 3.0-liter V6 concept version of its compact SUV. The vehicle’s public premiere comes this weekend at the annual Woerthersee meet in Austria. Although Audi officials are playing down the importance of the custom concept, insiders have told AutoWeek that it was constructed to provide customer feedback on a possible performance-oriented version of the Q5, the likes of which would almost certainly form part of the company’s future North American lineup.

Mopar Muscle Ram takes off at Monster Jam

Chrysler Group service and parts brand Mopar is entering the Monster Truck Racing Series with a new toy, the Mopar Muscle Ram monster truck. The series starts with Monster Jam on Jan. 11 in Detroit.