If you want a powerful, fast Porsche Cayenne, Stuttgart has no shortage of choices on offer, topping out with the mental 550 horsepower Turbo S. Of course, there are plenty of aftermarket tuners willing to take the unreasonable up to downright silly proportions, but if you were looking for power and speed without sacrificing too much fuel, for the most part you were advised to look elsewhere. After all, a big SUV isn't exactly the ideal platform for either. But then along comes Porsche tuner extraordinaire Techart to show you the way with its own custom Porsche Cayenne Diesel.

Boosting output from 240 hp and 406 lb-ft of torque to a hefty 290 hp and 465 lb-ft, the Techart Cayenne Diesel drops the stock 0-60 time of 8.3 seconds down to a handy 7.7 seconds, all without harming the vehicle's fuel economy or emissions numbers. Nice work, but the most impressive part is the modified torque curve that gives the big oil-burner accessible grunt from as low as 1,000 rpm.

Techart has also crafted a unique Aerokit 1 for the diesel sport-ute, giving it a more aggressive stance while improving airflow, capped with giant 21-inch alloys or optional 22s. The British tuning house offers a turnkey model at £55,500 (around $89k USD) with the body kit and engine mods, or can fit an existing diesel Cayenne with the Aerokit for £15,000 ($24k) and the engine kit for £2,500 ($4k). Details in the press release after the jump and high-res images are on offer in the gallery below.



[Source: Techart]

After working up a Lamborghini Murcielago with Edo Competition and then a Ducati Monster with Rever Corsa, the talent behind the Ed Hardy label has cooked up what looks to be a controversial one-off Ferrari 599 GTB Fiorano that's even more out there than Lapo Elkann's denim-clad version.

Decked out in decals of pin-up girls, skulls and crossbones, rolling dice and such, the Ed Hardy edition Ferrari – apparently worked up as a promotional tool for German retailer Mode Stern – is even more outlandish than the Audigier-designed VIF1 Escalade and the Empire Mercedes CL63 which have popped up on the internets recently. What isn't immediately clear is if this is an actual paintjob or just another shrinkwrapped exotic? Us? We know what we're hoping for...



[Source: AutoPlus.fr]

The BMW enters the massive skidpad at more than 100 mph and begins a sweeping right turn along a soldiered row of orange cones. On cue, a pneumatic device attached to the hub of the spinning left rear wheel instantaneously rips its air valve clean out. Abruptly unsettled by the simulated tire "blow-out," and the collapse of the tire, the family wagon plunges into a long and flat uncontrolled spin knocking the hapless cones skyward in its wake. The BMW finally comes to a rest off course, facing 180-degrees from its original direction of travel.

Melodramatic in execution, the tire demonstration was repeated again moments later. This time the BMW was fitted with a set of Bridgestone's new third-generation run-flat tires. The high-speed blow-out again unsettled the car, but riding on sustained tire sidewalls it remained controllable as it tracked within the cordoned lane of orange cones and gently came to a stop.

The demonstration was powerful. Without a doubt, run-flat tires do work. Unfortunately, we've never met a set that didn't ride rough, feel like anchors, or cost us an arm and a leg at the register. We typically avoid them at all costs. Determined to make a change, Bridgestone invited us to Italy to try out its latest iteration of run-flats, promising to alter the way we think about the technology. What is this new tire? Why is it different from its predecessors? And, most importantly, how does it ride? Find those answers and more after the jump...



Photos Copyright ©2009 Bridgestone Tire

Hennessey Performance Engineering makes the point that track-oriented Porsche owners can opt up from a normal 911 to a GT3 RS and Viper owners can choose the ACR edition, so what's out there for ZR1 owners who want a more hardcore machine? To answer that question, HPE has introduced the Z700 for 2010.

The exclusive new model features a number of enhancements that go beyond the requisite power increase, which in this case jumps from 638 to 705 dyno-tuned hp. HPE has also put the ZR1 on a diet, shedding pounds by adding lightweight carbon fiber seats and carbon fiber wheels wrapped in a Michilin Pilot Cup Sport tires. The wheels alone scrub off 60 lbs. of rotating weight. Aero enhancements include Hennessey's Z-Aero carbon fiber front splitter, canards and rear spoiler, all of which add 300 lbs. of downforce. Finally, an alcantara steering wheel and shift knob should feel better in the hand when barnstorming the track.

Hennessey plans to prove that the Z700 is a big improvement over the ZR1 by taking direct aim at the standard car's Nürburgring lap time of 7:26. They'll be flying to Germany with a Z700 later this year to take their best shot, but considering that HPE is perhaps the only only tuning company with its very own on-site track, Lonestar Motorsports Park, we expect good results.

Only 24 examples will be produced, and customers who order a Z700 also get a one-day performance driving instruction course at Lonestar Motorsports Park. Total cost for a base Z700 will start at $207,150, which also includes the cost of a donor ZR1. That's nearly a six-figure increase over the base price of a ZR1, so we'll have to wait until it sets some lap times to see if it's worth it.



[Source: Hennessey Performance Engineering]

The tuners at MTM have begun tweaking the all-new 2010 Audi S4 (B8) in Europe, and as expected, Audi's new supercharged 333-hp 3.0-liter V6 is rife with potential. With only a revised ECU – no underdrive pulley, intake or exhaust mods – MTM was able to coax 430 crank horsepower out of the blown six – 97 hp more than stock.

The kit, which retails for 2,491 euros (around $3,500 USD), brings torque output up to 380 lb-ft and, according to MTM, drops the 0-60 mph time from 5.2 to 4.6 seconds. Clearly, good things are on the way for the BMW 335i fighter, and we expect more to follow when the new darling of the Euro-tuning scene arrives in the States later this year.



[Source: MTM]

What is it lately that people don't seem to understand about hardcore off-roaders? They're not supposed to be aerodynamic, and they're not supposed to be pretty. And yet here we are yet again – after the modified Hummer recently spotted on eBay – looking at one of the world's most serious rock-climbing workhorses that's been smoothed out in controversial fashion, and in metallic Barney purple, no less.

What we have on one hand is the Mercedes Geländewagen, the same essential truck that Magna Steyr has been building for the Three-Pointed Star for some thirty years now. It's got the aerodynamic profile of a barn. Attached to a parachute. On the other, we have the E-Class, one of the most aerodynamically slippery cars on the market. Part of the same company's line-up, but just about as different as can be. And yet, thanks to what looks to be a not inconsequential amount of elbow grease, the two have come together to breed this remarkable concoction, which, we gather, was recently put up for sale on eBay. While we can't locate the auction itself, one has to figure that the owner is going to have a hard time selling a vehicle that's been so extensively "personalized."



[Source: Autogespot]

Christian Audigier won't leave us alone. The fashion designer responsible for decking out all the celebs in Ed Hardy and Von Dutch gear has made a killing off his overpriced wears, but apparently unsatisfied with infection of Hollywood, he's turned to motor vehicles as his unfortunate canvas.

As if the tattoo'ed Lamborghini Murcielago which Audigier created with Edo Competition – which in turn spawned the Ferrari F430 Calavera imitator – wasn't enough, he's set upon another exquisite piece of Italian exotica to tarnish: the Ducati Monster. Starting with the 1100cc superbike, Audigier and his partners at Rever Corsa have laid down some sort of dragon-tiger thing over a particularly gaudy red and gold paint scheme. This limited edition crotch rocket commands a $55,000 price tag, proving once again that money and taste don't always go hand in hand.



[Source: Rever Corsa]

We love Ford Mustangs of all shapes and sizes, and the age-old adage of "the more power the better" definitely applies. Scott Vanderschoor, a regular on Bang Shift forums, is working on one hell of a pony car; one that carries the panache of a 'Stang and the power of a Dodge Viper – with a pair of turbochargers providing a little additional motivation. Unsurprisingly, Vanderschoor reportedly needed to move back the firewall a half foot to make room for the massive 8.4L V10 engine, but we're guessing the labor will pay off with some absolutely incredible power numbers.

Hit the jump to see Vanderschoor's big beast as it turns over on camera for the first time. The sound is a bit different than you'd expect from a typical Mustang V8 growl and we're guessing that it has a little more oomph under the hood than most pony cars on the road – even before Vanderschoor tuning gets sorted out. This is one Mustang project we're looking forward to seeing more of! Check out the gallery below in addition to the video after the jump.Thanks for the tip, Brian L!



[Source: Bang Shift]

When we last visited the Hurst facility in Irvine, CA, we noticed something unusual. While nearly all of the Challengers were painted in either white or black, a lone Challenger painted in B5 Blue sat tucked away in a corner. When we inquired about the car, we were told that we would find out soon enough. Well, we know now, as Hurst has just unveiled a Competition/Plus package for the Dodge Challenger at the NHRA Motorsports Museum in Pomona, CA.

The Competition/Plus project was started in an effort to provide a more affordable package, as well as appeal to customers who might not necessarily want the classic gold paint schemes. Named after the legendary shifter that helped make Hurst famous, the package includes only the essentials: an Eibach suspension system, Magnaflow exhaust system, Hurst 20-inch alloy wheels, color-matched leather inserts and stitching for the interior, matte black exterior accents, and, of course, a Competition/Plus short throw shifter with the classic white ball. We're told the package is available on any color of Challenger, whether it's the B5 Blue pictured here, Hemi Orange, TorRed or any other.

Pricing has yet to be announced, but full details on the car should be released soon. Until then, take a look at our exclusive gallery of photographs that were given the chance to snap a couple of days before the car's release.



Photos copyright ©2009 Drew Phillips / Weblogs, Inc.

Ford tuning specialists Steeda Autosports have been teasing the 2010 version of their Q-Series Mustang for quite some time, and apparently for some of their customers, it can't come soon enough. To help deal with requests, the Florida-based company has introduced a Sport Edition model that utilizes an array of parts already in the Steeda catalog.

This particular steed is tweaked to handle, with upgraded billet lower control arms, sport springs, and 20-inch chrome wheels wrapped with Nitto NT05 high-performance tires. Other modifications include a sport shifter, underdrive performance pulleys, a performance air cleaner, and distinctive Steeda graphics. At $8995 $6,995, the pricing seems pretty steep, especially without any significant power upgrades, but we have to admit it's one good looking pony car.

[Source: Muscular Mustangs]

*UPDATE: Steeda representatives have contacted Autoblog with correct information regarding the new Sport Edition, including a different, wallet-friendlier package price of $6,995 (the source article cited incorrect information). The full, official press release has been added after the jump.