Stage 1 Cylinder Head Package w /GSC S1 Cams for 02-05 WRX S20 Casting 2013-subaru-wrx-sti GSC Springs

GSC Springs

Our test cars serve as daily drivers

CNC Pocket Ported with Standard Sized GSC Valves

GTIN: 00887753780188

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

Stage 1 Cylinder Head Package w /GSC S1 Cams for 02-05 WRX S20 Casting 2013-subaru-wrx-sti GSC SpringsIAG 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