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Message: <blockquote data-quote="niceputera" data-source="post: 449901" data-attributes="member: 2213"><p>Do the intake (air filter + piping), fit a slightly bigger exhaust from front to back (delete the cats), buy shrick road cams and find someone that can & has tuned up lots of bmws preferably via reflashing the ecu and you can safely achieve about 30% power at the engine . That's about as far as you can go by playing with the outside of the engine. If you want more than that we will need to open the engine, which is not recommendable since yours is 7 series, not say an e36 - a playful unit. Or change to v8 3.5 - newer engine, slightly more maintenance cost + roadtax BUT a lot more for the money in terms of power and smoothnest of the engine. It will cost less as well compare to tune up the 2.8L.</p></blockquote><p></p>