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I am interested in remapping my 2015 435xd, these are the options I've considered:

Avon Tuning are offering Stage 1 for £350 + £50 for rolling road

They are claiming 313 -> 360hp (630 -> 700nm) and 15-20% mpg increase

It's a 3+ hour process to achieve this at their premises

and,

Celtic Tuning are offering Stage 1 for £360

They are claiming 313 -> 405hp (630 -> 772nm) and 10% mpg increase

They come to your home/work to perform this and will reverse and refund money up to 14 days if not happy

Any views, Celtic seem closer to a Stage 2 !! but seriously, any experience to offer?
 

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try and contact bwchiptune,,they are a sponsor of this forum,,also he is very good..and he can explain why his software is way ahead of generic/franchise tuning companies
 

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Those claimed mpg increases make me laugh!

:)
 
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