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Technical Features: Milltek Exhaust for B7 RS 4

Fourtitude: July 2007 issue

Modifying a rare, ultra-high performance automobile is tricky business. This is especially true for the RS 4, as engineers at quattro GmbH outdid themselves developing the car: 19-inch wheels, 14.4-inch front cross-drilled rotors with eight-piston calipers, dynamic ride control and of course the high-revving (8,250 rpm) 420hp 4.2l V8 FSI engine. With a platform that has already been extremely tweaked, what else is there left to do?

When this 2007 Imola Yellow RS 4 was added to the fleet of cars owned and driven by Fourtitude staff, our first thought was to turn it into a project car. However, the B7 RS 4 represents the first time we've wondered if there's enough room for improvement to warrant a project series.

Especially in its bright gold hue, the car attracts a lot of attention. People often comment on the car and ask what has been done to it – those same people are astonished to hear that the car remains basically the way it comes from the factory. With an integrated spoiler lip, wide fender flares and an aggressive front bumper, there are few aftermarket cosmetic enhancements to be had here.

Certainly we could change some cosmetics for subjective tastes, and we've thought of changing to another set of wheels. However, with 19x9" wheels, that's easier said than done. Most other wheels for Audis are only 8" in width – a downgrade in performance of sorts, though they might make it easier to slide around.

For now, we've decided to utilize the RS 4 for a small series of technical articles. With a limited number of modifications planned for the car, this seemed the best route. And, having heard the sultry tone of Champion Racing's demonstrator RS 4 at ALMS races, with its straight exhaust, we were inspired to begin with the car's audible tone, and maybe even adding some more power.

Read the full review including dyno tests and photos on the Fourtitude Website (link below)...

More information
You can view the article at www.fourtitude.com/news/publish/Features/article_3305.shtml or visit the main Fourtitude website.