Sometimes,” says Hartmut Feyhl, “I am a little ashamed to call myself a tuner.” Not because the calling itself isn’t noble (how can making cars go faster and handle better be otherwise?), but because ...

The W140 Mercedes S-Class was always available with plenty of grunt, but AMG tuner Renntech has seen fit to give the mighty luxobarge a bonkers 615-horsepower V12 upgrade. The resulting beast is known ...

Renntech, a specialized Mercedes-Benz tuner from the United States of America, has revealed a new package for the S 63 in Coupe guise. We are writing about an evolution (pun intended) of a previous ...

The ad for today's Nice Price or No Dice SL600 claims the car's twin-turbo V12 has been massaged by RENNTech, resulting in a 635-horsepower output. That's nothing to sneeze at, but we'll still have to ...

The Mercedes C63 AMG is probably one of the fastest cars in its class. Still, more tuners are beginning to modify it in order to make the little Mercedes faster and take it to its limits. One of the ...

The Mercedes-AMG GT Black Series is a track monster but RENNtech’s R3 upgrade package is here to make it even more powerful and extreme, for AMG owners who can’t settle with factory power. See Also: ...

Renntech’s aftermarket package for the Mercedes-AMG S63 Coupe should appeal to those who, for one reason or another, didn’t want to go with the range-topping V12 S65 model of the series. Starting with ...

LAKE PARK — Several weeks ago, I got a press release for a product that was designed to appeal to “tuners.” It was for some adhesive stripes that go on the side of a car, “for that tuner custom look!” ...

The SLR McLaren supercar has been quite a canvass for tuners--and even Mercedes itself. And though the end is near for the SLR, it won’t fade quietly into car history. Florida tuner Renntech is ...

Today, Kirby’s focus has shifted toward following industry news, and he has a sincere passion for one-off and tuned vehicles, car toys (especially LEGO brand,) and anything else even closely related ...