Arlen Ness Xenolen Archfiend Black Led Rear Turn Signals: 12-775 on 2040-parts.com

One Lap of the Web: Porsche 959s, the Alfa Romeo 4C and the Mercedes-Benz A45 AMG vs. the BMW M135i

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- When initially produced to satisfy FIA homologation requirements in 1986, the Porsche 959 was the world's fastest street-legal production car.

SEMA releases guide to registering custom cars

For the first time in five years, SEMA released its updated 50-state guide to help street-rod, custom-kit and replica-car owners register them. Known as the Tag and Title Toolbox, SEMA's updated database has the administrative forms and proper terms needed when working with each state's motor-vehicle department. The paperwork for each state is compiled and organized, with hobby-related words highlighted for quick reference.

Renault Twin’Z Concept previews 2014 Renault Twingo

The Renault Twin’Z Concept, designed by British designer Ross Lovegrove, is an electric city car previewing the 2014 Renault Twingo. The Renault Twin’Z Concept is a small, just 3623mm long, urban runaround with a small electric motor good for 67bhp and 167lb/ft of torque  and weighing in at 980kg, complete with a fairly sophisticated double wishbone suspension and relatively long wheelbase with a wheel at each corner stance. The Twin’Z is very much a concept car - designed by British designer Ross Lovegrove – and comes complete with the usual concept fripperies like electric suicide doors, cameras instead of rear view mirrors, sweeping LED lights, a solid crystal rear spoiler and big, complicated alloys.