Exhaust Manifold Included: Yes. Gasket or Seal Included: Yes. Wastegate Actuator Included: No. 171702, 23518588, 23518597, 23523197. Professional installation is recommended. Most of the items are after-market, so, no installation instruction will be included. For replacements, please notice us within 5 days after you receiving the item. We will try our best to serve you better!