* Camshafts: -- Select -- New OEM Camshafts ( + $680.00 ) Tomei Poncam Camshafts Subaru 2.5L Turbo Models Intake AVCS TOM-143062 ( + $720.00 ) GSC Billet Stage 1 part number GSC-7025S1 ( + $956.25 ) GSC Billet Stage 2 part number GSC-7025S2 ( + $956.25 ) GSC Billet Stage 3 part number GSC-7025S3 ( + $956.25 )
* Intake Valves: -- Select -- Supertech Standard Size Nitrided Intake Valves WRX/STI Part number (SUP-SIVN-1010) ( + $160.00 ) Supertech +1mm Nitrided Intake Valves WRX/STI [Includes $40 for grinding the seats] (SUP-SIVN-1014) ( + $200.00 ) GSC Subaru EJ Series Chrome Polished Intake Valves (+1mm) (GSC-2014-8) ( + $155.60 ) Ferrea Subaru WRX/STI 37mm Competition Plus Intake Valves +1mm (FER-F1524P) ( + $256.00 ) Ferrea Subaru WRX/STI 37mm Competition Plus Intake Valves STD (FER- F1520P) ( + $216.00 )
* Exhaust Valves: -- Select -- Supertech Standard Size Inconel Exhaust Valves WRX/STI (SUP-SEVI-1010) ( + $235.00 ) Supertech +1mm Inconel Exhaust Valves WRX/STI (SUP-SEVI-1014) ( + $275.00 ) Supertech WRX/STI Sodium Filled Inconel Exhaust Valves +1mm (33mm) (SUP-SEVI-1014-HS) ( + $400.00 ) GSC Subaru EJ Series Chrome Polished Exhaust Valves (STD) (GSC-2011-8) ( + $114.58 ) GSC Subaru EJ Series Chrome Polished Exhaust Valves (+1mm) (GSC-2013-8) ( + $144.58 ) GSC Subaru EJ series Chrome Polished Super Alloy Exhaust Valves (STD) (GSC-2015-8) ( + $190.40 ) GSC EJ series Chrome Polished Super Alloy Exhaust Valves (+1mm) (GSC-2017-8) ( + $230.40 ) Ferrea Subaru WRX/STI 33mm Competition Plus Exhaust Valve +1mm (FER-F1519P) ( + $304.00 ) Ferrea Subaru WRX/STI 33mm Competition Plus Exhaust Valve STD (FER- F1514P) ( + $264.00 )
* Valve Guides: -- Select -- Leave OEM GSC EJ Series Manganese Bronze Valve Guides Stopper Style GSC-3025/3026 ( + $206.20 ) Supertech Manganese Bronze Valve Guides WRX/STI SUP-GDE-SUEJ6-I/E ( + $251.00 )
* Spring Kit: -- Select -- Supertech Dual Valve Spring and Titanium Retainer Kit 70# SUP-SPRK-TS1015-SU1 ( + $430.00 ) Supertech Dual Valve Spring and Titanium Retainer Kit 82# SUP-SPRK-TS1015-SU4 ( + $430.00 ) Supertech Dual Spring and Retainer Kit Drag Use Only 100# SUP-SPRK-TS1015/IN-SU4 ( + $469.00 ) GSC Single Valve Spring Set w/ Titanium Retainers 75# GSC-5743 ( + $255.00 ) GSC Beehive Valve Springs W/ Titanium Retainer Kit 85# GSC-5043 ( + $369.75 )
* WPC Options: Valves WPC-VALVES ( + $128.00 ) Buckets WPC-BUCKETS ( + $128.00 ) Camshafts WPC-CAM ( + $160.00 ) Retainer WPC-RETAINER ( + $128.00 ) Springs WPC SPRING ( + $192.00 )
* Headstud Machining: -- Select -- Stock Diameter ½” Headstud Machining ( + $50.00 )
* Half Moons: -- Select -- Stock Plastic Outfront Motorsports Billet Aluminum Half Moons OUT-ENG-HALFMOONS ( + $40.00 )
* A Porting Option must be selected if using +1 valves: -- Select -- no porting Bowl blend ( + $200.00 ) Stage 1 Port/ Casting Cleanup ( + $400.00 ) Stage 2 Port ( + $620.00 ) Stage 3 Port ( + $700.00 )