I would just get a refund as above I would swear by an ebc I only run a 0.5 bar spring and let the ebc do all the rest I was going to go down the route of just wacking a 1 bar spring it but my mate went down to mapping with a hybrid set up with the 1bar spring in it and didn't quite make the 200 mark unfortunately if he ran an ebc I really reckon he could of pushed more, boost still drops off up high end without one