Phoenix Engine Specialist, Quality Remanufactured Engines Core Charge - At this time we are not requiring a core or core charge. All Engines are built to order. Performance Parts - We do not blueprint engines. If you would like us to install custom or special performance parts we can absolutely do it for you, but we would have to waive our 1-year warranty. You would be responsible for the cost of said parts and paying ship them to us. We would charge no additional cost of installing these options. Contact Information: Google +: https://www.google.com/maps?cid=7447175131019038411 Phone #: (623) 204-6365 Website: https://phxenginespecialist.com Address: 4012 N 39th Ave #B, Phoenix, AZ 85019