All gaskets were redone 2 years ago when i did the top swap.(about 15k miles) I have had the sub in the car for about 6 years. EGR has been deleted, cleaned my air intake filter about 6 months ago, spark plugs were changed less then 1k miles ago. Looksl like im getting 12.7v when the car is off and 14.2v when the car is running.