Well, there is a difference in the stock 4.8is sound vs. the x-piped 4.8is sound. One is nice and pleasant. Very middle of the road "sporty". Not too aggressive, but lets you know its there. The x-pipe mod turns this grocery getter/baby hauler into a aggressive kick ass sounding V8 mean machine. After the X-pipe install, my 4.8is sounds more aggressive than an E39 M5 and closer to the E60 M5. Very nice IMO.

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2004 X5 4.8is - X-pipe! V1 hardwired, Invision DVD headrests, N62 Intermediate Levers Fixed! FOR SALE!!! Contact me if interested!

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