Stage 1 Cylinder Head Package w /GSC S1 Cams for 02-05 WRX S20 Casting 2013-subaru-wrx-sti By 2010 Pedders USA had

By 2010 Pedders USA had established industry partnerships with GM

CNC Pocket Ported with Standard Sized GSC Valves

The IAG AOS conversion kit for the 2015-20 Subaru WRX FA20 DIT engine is designed to switch the upper breather portion of the Street Series AOS to the Competition Series AOS

one of the most advanced precision engine machining equipment in the world

Stage 1 Cylinder Head Package w /GSC S1 Cams for 02-05 WRX S20 Casting 2013-subaru-wrx-sti By 2010 Pedders USA hadIAG Stage 1 Cylinder Head Package with GSC Stage 1 Cams: IAG's Stage 1 cylinder heads are intended for those looking for a cost effective OEM+ replacement. Each package starts with brand new WRX S20 OEM head castings, directly from Subaru of America. The bare castings are visually inspected and then fixtured into our in house Centroid 5 axis CNC Machine. This is one of the most advanced pieces of precision engine machining equipment in the world. In