APEXi® Metal Cylinder Head Gasket (814-N203) 1552 all exhaust gases flow through

all exhaust gases flow through the muffler

- 3 inch mandrel-bent aluminum tubes replace stock restrictive air box and optimize the air flow with excellent heat dissipation and long lasting durability

Boasting a simple install

This product fits Ford 2003-2007 Excursion 6

Once they are paired

APEXi® Metal Cylinder Head Gasket (814-N203) 1552 all exhaust gases flow throughMetal Cylinder Head Gasket (814 N203) by APEXi. The APEXi metal headgaskets provide upgraded protection on high horsepower engines. Factory headgaskets cannot withstand the pressures of high output operation and often cause the engine to "blow." This condition is actually caused by a failure in the factory headgasket. APEXi recommends replacing the factory headgasket with a metal one before gasket failure causes more damage to the engine. The gaskets