Re: Peugeot 307 hdi remap? Yes it will have a dpf, which I would remove, I would say a freer flowing exhaust is only really needed after any performance upgrade after a "stage 1" remap for example an intercooler, if you are going to be pushing more rubbish out into the exhaust the backpressure is going to be greater, which if you add an intercooler and futher the first remap then this I would look into, plus EGT's are something to consider which is why i suggested the possible need for one in the future
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