The Evolve long tube headers, made by Supersprint, for the 1998-2004 BMW E39 M5 and for the 1997-2003 Alpina B10 S, are hands down winners when it comes to performance.
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These bad boys make huge power gains over the restrictive stock manifolds, all across the powerband.
When completed with the Supersprint free-flowing exhaust, they provide not only for a massive increase in torque and in peak hp, but they guarantee a monumental V8 sound as well.
The Evolve / Supersprint headers, available in distinct versions to fit the LHD and the RHD cars, are a must-have for every serious BMW M5 / Alpina B10 S owner.