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As above, I'd like to maximise fuel economy over power if possible, it's the 177 bhp A4 (MY13) - which tuning company has anyone used?

Many thanks, Tim

Hi Tim, try a company called Darksidedevelopments.co.uk a friend of mine has his MK5 tdi golf sorted by them, running 280bhp and over 450nm. Pulls like a train

Thanks - I'll look them up, I'm not use to modding diesels tbh.