Process West 5" Stage 4 Intercooler Core BlackOur stage 3 core for the FG has long been the market leader. The time has come to step things up for those of you looking for extreme power levels. Introducing the STAGE 4: The Largest, most efficient core on the market. 500 x 425 x 152mm of bar and plate goodness. Features 3. 5in inlet outlets for large piping and large flow. The core only part number comes with a replacement front re enforcement bar. Air conditioning condensor is retained.