OSIR CF Front Splitter & Rear Valence, Eurocode Tuning IC Pipe & Catback Exhaust (April 23, 2010)For those of you unfamiliar with the B8 A4, the S-line version and the regular A4 have different frotn and rear bumpers. For most of us that wanted a quad-tip exhaust system, we would have needed to replace the entire rear bumper with the S-line bumper. This, of course, would neccessitate getting the S-line front bumper as well, IMHO.After waiting for a couple of months, OSIR, an aftermarket company specializing in CF products for VW & Audis, finally created a quad-tip rear valence that fits the non-Sline A4 bumper. After the parts arrived, I once again headed over to Eurocode Tuning for their quad-tip catback exhaust and intercooler pipe.Once again, I was very pleasantly surprised. In terms of performance gains, the difference is noticeable, though no where near the same level as the ECU reflash from a couple months back. The car also looks much more aesthetically pleasing compared to the stock single-sided tips. Just the symmetry makes a huge difference IMHO. The exhaust has an extremely deep tone that isn't too loud, and after ~ 20 miles, I've noticed barely any drone in the vehicle. Another is that the rear valence looks incredible. The intercooler pipe also works like a charm, removing the factory airbox and allowing for quicker turbo spool.