bannon Posted November 9, 2014 Share Posted November 9, 2014 Hey! Sorry if it's already been discussed or there be a topic on it, but I'm considering changing the exhaust on my Zetec S mk7 Fiesta. I've seen the mountune cat back exhaust and wanted to know if this would maybe improve mpg? And how much difference in performance does it add? Thanks a bunch. Newbie here haha Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
Philf1 Posted November 9, 2014 Share Posted November 9, 2014 Jordan my understanding would be that a bigger exhaust will probably reduce mpg and BHP unless you get the car re-tuned as well. Give Mountune a call they will advise you better. 1 Quote Link to comment Share on other sites More sharing options...
bannon Posted November 9, 2014 Author Share Posted November 9, 2014 Thanks phil! Just wanted some kind of clarification on it, couldn't really find anything online about it. Will call Mountune tomorrow. Have a bit of scepticism on it though, as it being there product they might sugar coat the facts to try and get a sale from me haha. Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
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