EPnick22 Posted January 1, 2014 Share Posted January 1, 2014 seen a few exhaust systems now all with 2.25" front section, then changes to a 3" mid section. why is this? why not just have a 3 inch the whole way down? Quote Link to post Share on other sites
AdamB Posted January 1, 2014 Share Posted January 1, 2014 To keep up gas velocity I guess. Quote Link to post Share on other sites
jayc-glanza17 Posted January 1, 2014 Share Posted January 1, 2014 front sections on starlets are tight until after front anti roll bar..it is more to do with space restrictions..my zisco is 2.75 then into a 3 inch after because of this reason. Quote Link to post Share on other sites
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