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Porsche 911 Turbo and Nissan GT-R Nismo star in World's Greatest Drag Race 4

We love Motor Trend's annual World's Greatest Drag Race video. Now back for its fourth appearance, the idea of lining some of the world's fastest cars up for a ten-wide, straight-line, full-throttle run is, well... it's pretty freaking badass.
The lineup this year boasts some impressively fast cars to be sure. The group of ten includes the following darlings: Alfa Romeo 4C, BMW i8, BMW M4, Chevrolet Camaro Z/28, Ford Fiesta ST, Jaguar F-Type R Coupe, Nissan GT-R Nismo, Porsche 911 Turbo S, Subaru WRX STI and, last but not least, the Volkswagen GTI. Give us any one of those for the weekend, and we're happy to take the keys.
It must be said though, that for a publication that draws as much water as Motor Trend does, there are some big cars that we might expect to be here instead. The Lamborghini Huracán or Ferrari 458 Speciale would have added some exotic flare to the list, and the omissions of the Chevy Corvette Stingray (for the second year in a row) and the Dodge Challenger Hellcat are real head-scratchers.

Jay Leno puts carbon fiber wheels to the test on a Porsche 911 GT3 RS

Jay Leno's Garage usually focuses on looking at cars new and old, speaking to their owners and then Jay taking a drive to see what he thinks. However, Leno throws his usual shtick to the curb this week to do a full product test of the carbon fiber wheels from a company called Carbon Revolution. If you're not interested in hearing about wheels for 18 minutes, don't worry. They get mounted on a Porsche and are tested back-to-back with stock wheels, and Leno takes the 911 for a track test, too.
While carbon-fiber wheels aren't exactly a new idea, Carbon Revolution's goal is to create a lightweight, one-piece product that can be mass produced. The company even claims that it already has a deal with an OEM automaker to offer them on a vehicle in a few years. The key to the technology is that it doesn't need an expensive autoclave to be made.
In the meantime, the company's carbon fiber wheels are available as an aftermarket option for about $15,000 a set, according to the video. They weigh in at about 15.5 pounds each and offer OEM-levels of stiffness, so they could cut some unsprung mass off of a performance car. Watch here as Jay and his mechanic Bernard lap Willow Springs and give their feedback about what they think of this cutting-edge technology.

UK Porsche GT3 owners are irked that other countries are getting better deals

Porsche 911 GT3 owners in the United Kingdom are up in arms, but it's not for the reason you might think. Okay, well it sort of is. See, it's been fairly well documented that 911 GT3 owners have had their cars grounded over concerns that the engines could catch fire. Porsche is rushing to build and install replacement engines in all 800 or so cars, scattered around the globe.
This isn't really the issue. The problem for these British owners is compensation. While the car's have been grounded, car notes still need to be paid. To deal with this, American GT3 owners are being paid $2,000 per month. German owners get 175 euros ($242 at today's rates) per day while a GT3 owner in Dubai is allegedly receiving $12,000 (it's unclear if this is a lump sum or a monthly payment). Basically, if you aren't able to drive your six-figure super car, you shouldn't have to pay for it. Seems reasonable regardless of the make.
British owners, though, aren't being compensated, and for 30 to 35 owners, that's not acceptable. They've banded together and are led by Sunil Mehra.