One of the best dollar for dollar upgrades for a K20 engines. 12-15whp is an average gain. The item "Honda RBC Pre-Modified Intake Manifold With Thermal Gasket K20 K Swap" is in sale since Thursday, June 12, 2014. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Air Intake & Fuel Delivery\Intake Manifold". The seller is "valexracing" and is located in Elk Grove Village, Illinois.This item can be shipped worldwide.