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The heads are then reassembled using GSC Billet S3 camshafts
which was a completely open deck with no support
uses the same OE quality components and is calibrated to restore original
Prothane 98-05 Subaru WRX Rear Trailing Arm Bushings - Black
it's the perfect choice for an street/track applications with moderate bolt-ons
IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves & GSC S3 Cams for 02-05 WRX S20 Casting. 2013-subaru-forester-x premium The heads are then reassembledIAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the S20 heads that was developed over the past five years and tested on the most successful high horsepower Subarus. The ported head package starts with brand new S20 OEM WRX head castings directly from Subaru of America. The bare castings are visually inspected then fixtured into our in house Centroid 5 axis CNC Machine, one of the most advanced precision engine machining
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