Had stage one on for a while, with evoms , then decided to buy a Milltek DP and cat , with a custom connector pipe (same diameter as OE), and use the standard pre silencer and back box, and go for stage 2, after having the DP and cat fitted, i went to my tuner to have the stage 2. There is the dreaded misfire at 6 ish k.think it was cylinder number 3. They said it will be cured by fitting the rest of the milltek, (cat back) so i ordered this, along with the Autotech HPFP. Its being fitted on the 27th.
My question is, will this cure the misfire? or will it remain unless i have the exhaust valves changed?
Has anyone had to pay to have this done? As mine is an 07 its now just out of warranty