Fabtech full-length header questions???
#1
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Fabtech full-length header questions???
Looking at doing full length headers as my first mod. (2003 E55). Any feedback from others who have used these? Will installing these cause a check engine light without also upgrading the ECU tune? Been reading lots about offshore built headers, does Fabtech manufacture in North America? Any recommendations with regards to other cost effective full-length header options?