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Porsche Boxster Spyder to get GT3's 4.0-liter flat six?

It's been a merry-go-round the past few months, the rumormill focused on what will power the next Porsche Boxster Spyder. First came hearsay of a flat-six going into the special edition of a model line known for its turbocharged four-cylinder engines. Then came tattling that the flat-six in question was the naturally aspirated, 4.0-liter from the 911 GT3. A couple of weeks ago we wrote " we'd be surprised if Porsche packed anything other than a turbocharged flat-four under the skin." But Autocar has a new report that, indeed, a downtuned version of the 500-horsepower 4.0-liter from the GT3's rump will move to the Boxster Spyder's midsection. The Autocar piece follows a Wheels magazine article from last November, and the prediction isn't outrageous. When Car and Driver reviewed the last Boxster Spyder, it wrote, "the hand-me-down six comes from the older 911 Carrera S, not to be confused with the new turbocharged 3.0-liter flat-six that powers the refreshed 911." If we can believe a recent report from Automobile about the 992-series 911 due later this year, the same thing is happening: The 991.2-series GT3 bequeaths its powerplant to the smaller sibling, and the 992-series GT3 moves to a 3.8-liter, twin-turbo flat-six with around 550 hp. Autocar quotes Andreas Preuninger, the Porsche engineer leading the development of all of these wunderkinds, saying of the Boxster earlier this year, "Natural aspiration is one of our main USPs. ... [We] think we can achieve throttle response and immediacy a little bit better with an atmospheric high-revving engine than any kind of turbo." We'll guess that means, by inference, that the GT3 is about to age out of naturally-aspirated university. The limited-edition Boxster Spyder might carry the torch with the 4.0-liter, with output somewhere around 430 hp. The Cayman GT4 could do the same. Or, who knows, an evolution of the 375-hp, 3.8-liter flat-six in the previous Boxster Spyder might burble out of left field. We expect to see the Boxster Spyder late this year. Until then, we'll wait to see what the merry-go-round says next time the Zuffenhausen horse comes around. Related Video: Featured Gallery Porsche 718 Boxster Spyder spy shots View 13 Photos News Source: Autocar via JalopnikImage Credit: CarPix Rumormill Pontiac Convertible Luxury Special and Limited Editions Performance porsche 911 gt3

AMC Trans Am Javelin SST, an ultra-rare underdog, is up for auction

Among the rarest of the American muscle cars that went racing in the early Seventies — cars including the Camaro Z/28 and the Boss 302 Mustang — the 1970 AMC Trans Am Javelin SST may be the most hard to find, and among the most valuable. Only 100 units of this unique Javelin were produced, and one of them is up for auction at the Mecum event in Dallas on September 20. The Trans Am Javelin was fashioned in a patriotic livery of tricolor paint — red, white and blue — and arrived after the American Motors Corporation had decided in 1968 to compete in the Trans Am racing series against Ford and General Motors. The company's chief driver, Mark Donohue, would dominate the 1971 season, taking seven wins in his Javelin AMX and that yearÂ’s SCCA Trans-Am Championship. AMC took the trophy with 82 points, well ahead of Ford's 61, Chevrolet's 17 and Pontiac's paltry 7. The example listed for auction came equipped with a 390-cubic-inch V-8 engine with 325 horsepower at 5,000 rpm and 420 pound-feet of torque, power steering and brakes, dual exhaust, BorgWarner four-speed manual transmission and Hurst competition shifter. Its “ram induction system” sealed a chamber around the air filter so that cool air from the functional hood scoop would be funneled into the intake. This JavÂ’s factory price was $3,995 — a mere $32,000 or so in today's money, though it was expensive by the standards of the time. The 100 Trans Ams were among 19,714 Javelin units built in 1970, so they started out rare, and today the surviving examples are highly collectible, if and when they come up for sale. No bid estimate is available yet. Related Video: Motorsports Chevrolet Ford Pontiac Auctions Automotive History Racing Vehicles Classics

Pontiac Aztek enjoys rebirth thanks to Millennials

Apparently, Millennials – those between 18 and 34 – aren't afraid to look different on the road, and they like performance, too. A new study by Edmunds is discovering some surprising vehicle choices by this group. Among them, the long-derided Pontiac Aztek is getting a new day in the sun with 25.5 percent its buyers coming from this generation in the first half of 2015. For comparison, Millennials represent an average of 16.8 percent of used car purchases. The Aztek is slowly shaking its reputation as a styling abomination, which seems tied to its appearance on Breaking Bad. The show premiered in 2008, and the Pontiac has been on this list for four of the past five years, according to Edmunds. It even led the pack in 2010. A recent Retro Review from MotorWeek also showed that the crossover wasn't always so hated. While it's still a shock to see the Aztek on any popularity list, the awkward-looking crossover only ranks sixth among Millennials. The vehicle with the biggest portion of buyers from the generation is the Dodge Magnum with 27.6 percent. According to Edmunds, the bluntly styled wagon is especially popular in Detroit and Chicago. The Chrysler Pacifica comes in a close second at 27.3 percent. When it comes to used cars, value and utility appear to trump just about anything else for many Millennial buyers," Edmunds analyst Jeremy Acevedo said in the report. Young buyers aren't afraid of sporty rides, either. The Subaru WRX has 26.4 percent Millennial buyers to rank third place on the list, and the Volkswagen R32 takes fifth at 25.7 percent. Just a few points lower in seventh place is the Nissan GT-R at 25.4 percent, and the final performance machine in 10th place is the Lexus IS-F with 24.7 percent. Related Video: