This does not require a core, we will reduce the price if you have one.

The E58 is one of Meyer's newer designs with a better angling block. The problem with the new E58 is that the only come in H with the 8" stroke and it does not work on a Classic or Conventional mount. So this is a custom built pump. It has the 6" stroke to fit in place of a normal height E47, E57, or E60. Makes a great upgrade.