13-05-19, 04:44 PM
Have you actually totally removed the valve as it is quite possible to trap it in position if it hasn't been put back properly and this will appear as if it is seized? The general consensus is that those aftermarket headers are not worth the money as they ruin the power delivery, you would probably be just as well off removing the EXUP and putting a blanking plate over the hole as you would still have a crap power delivery but a fatter wallet. Best bet is to try to get the EXUP working, you might not need new cables just take one step at a time for now.