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Vendor:Brian CrowerBrian Crower Subaru EJ205-WRX/EJ257-STi Single Valve Springs - BC1600
Only 2 leftRegular price $96.00Sale price $96.00 Regular priceUnit price per -
Vendor:Brian CrowerBrian Crower Subaru BRZ/Scion FR-S/Toyota GT86 4UGSE Single Spring & Titanium Retainer Kit w/ Seats - BC0650
Only 3 leftRegular price $394.00Sale price $394.00 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC Subaru EJ Valve Spring Seats OEM Style Replacement - GSC1005
Only 19 leftRegular price $22.44Sale price $22.44 Regular priceUnit price per -
Vendor:Brian CrowerBrian Crower Subaru EJ205/EJ257 Single Groove Valve Stem Keepers/Locks (fits BC2160) - BC2960
Only 2 leftRegular price $109.00Sale price $109.00 Regular priceUnit price per -
Vendor:Brian CrowerBrian Crower Subaru EJ205-WRX/EJ257-STi Titanium Retainers - Set of 16 - BC2300-16
Only 4 leftRegular price $204.00Sale price $204.00 Regular priceUnit price per -
Up to $6.68 OFFVendor:GSC Power DivisionGSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD) - 2015-01
Regular price $37.86Sale price $37.86 Regular priceUnit price per$44.54 -
Up to $3.81 OFFVendor:GSC Power DivisionGSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 33mm Head (+1mm) - Single - 2013-01
Only 5 leftRegular price $21.57Sale price $21.57 Regular priceUnit price per$25.38 -
Up to $3.80 OFFVendor:GSC Power DivisionGSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single - 2014-01
Only 10 leftRegular price $21.52Sale price $21.52 Regular priceUnit price per$25.32 -
Up to $3.77 OFFVendor:GSC Power DivisionGSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - Single - 2012-01
Regular price $21.38Sale price $21.38 Regular priceUnit price per$25.15 -
Vendor:Brian CrowerBrian Crower ARP2000 Cam Gear Bolt Set (4) - Fits 02-05 Subaru WRX Non AVCS
Regular price $140.00Sale price $140.00 Regular priceUnit price per -
Up to $3.78 OFFVendor:GSC Power DivisionGSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 32mm Head (STD) - Single - 2011-01
Regular price $21.43Sale price $21.43 Regular priceUnit price per$25.21 -
Vendor:Manley PerformanceManley Race Flo 37mm Intake Valve Set For Subaru WRX / STI / FXT / LGT (8)
Regular price $211.14Sale price $211.14 Regular priceUnit price per -
Up to $3.78 OFFVendor:GSC Power DivisionGSC P-D Subaru/Scion BRZ/FR-S FA20 21-4N Chrome Polished Intake Valve - 35mm Head (STD) - Single - 2122-01
Only 11 leftRegular price $21.43Sale price $21.43 Regular priceUnit price per$25.21 -
Up to $52.79 OFFVendor:Manley PerformanceManley 00-03 Subaru WRX (EJ20) / 04 STI Exhaust 32mm Stainless Race Master Valves - 11155-8
Only 8 leftRegular price $211.14Sale price $211.14 Regular priceUnit price per$263.93 -
Up to $52.79 OFFVendor:Manley PerformanceManley Race Flo 36mm Intake Valve Set For Subaru WRX / STI / FXT / LGT (8) - 11138-8
Only 7 leftRegular price $211.14Sale price $211.14 Regular priceUnit price per$263.93 -
Up to $8.76 OFFVendor:GSC Power DivisionGSC Exhaust Valve Guide Set with Depth Stopper For Subaru EJ20 / EJ25
Regular price $49.65Sale price $49.65 Regular priceUnit price per$58.41 -
Vendor:GSC Power DivisionGSC Intake Valve Guide Set with Depth Stopper For Subaru EJ20 / EJ25
Regular price $49.65Sale price $49.65 Regular priceUnit price per -
Up to $8.76 OFFSold OutVendor:GSC Power DivisionGSC P-D Subaru/Scion BRZ/FR-S FA20 Manganese Bronze Intake Valve Guide - Set 8 - 3064-8
Regular price $49.65Sale price $49.65 Regular priceUnit price per$58.41 -
Vendor:Brian CrowerBrian Crower Valve Guides - Subaru EJ205/EJ257/EJ257B 6.0mm Exhaust (Quantity of 8) - BC3961
Only 3 leftRegular price $81.00Sale price $81.00 Regular priceUnit price per -
Vendor:Brian CrowerBrian Crower Valve Guides - Subaru EJ205/EJ257/EJ257B 6.0mm Intake (Quantity of 8) - BC3960
Only 3 leftRegular price $81.00Sale price $81.00 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC Intake Valve Guide Set with Depth Stopper For Subaru EJ20 / EJ25 - 3026-8
Regular price $49.65Sale price $49.65 Regular priceUnit price per -
Up to $8.76 OFFVendor:GSC Power DivisionGSC Traditional Intake Valve Guide Set For Subaru EJ20 / EJ25 - 3028-8
Only 8 leftRegular price $49.65Sale price $49.65 Regular priceUnit price per$58.41 -
Up to $3.09 OFFVendor:GSC Power DivisionGSC P-D Subaru EJ257/EJ207/EJ205 Viton 6mm Valve Stem Seal Set - 1022
Regular price $17.52Sale price $17.52 Regular priceUnit price per$20.61 -
Vendor:SubaruTiming Chain Lever Tensioner For 2015-24 Subaru WRX, 13-24 BRZ
Regular price $39.98Sale price $39.98 Regular priceUnit price per -
Vendor:SubaruTop Right Timing Chain Guide For 2015-25 Subaru WRX, 22-25 BRZ
Regular price $39.98Sale price $39.98 Regular priceUnit price per -
Vendor:SubaruLower Left Timing Chain Guide For 2015-25 Subaru WRX, 13-25 BRZ
Regular price $39.98Sale price $39.98 Regular priceUnit price per -
Vendor:SubaruTiming Chain For 2015-24 Subaru WRX, 13-24 BRZ
Regular price $150.00Sale price $150.00 Regular priceUnit price per -
Vendor:SubaruSubaru Chain Tensioner For 2015-21 Subaru WRX, 13-20 BRZ
Regular price $110.65Sale price $110.65 Regular priceUnit price per -
Vendor:SubaruChain Tensioner For 2015-21 Subaru WRX
Regular price $104.73Sale price $104.73 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC S1 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS
Regular price $999.28Sale price $999.28 Regular priceUnit price per -
Up to $186.82 OFFVendor:GSC Power DivisionGSC S2 Billet Camshaft Set for the 2008-21 Subaru STI with Dual AVCS
Regular price $1,058.68Sale price $1,058.68 Regular priceUnit price per$1,245.50 -
Vendor:GSC Power DivisionGSC S1 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS - 7025S1
Regular price $999.29Sale price $999.29 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC S2 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS - 7025S2
Regular price $999.29Sale price $999.29 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC S3 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS - 7025S3
Only 7 leftRegular price $999.29Sale price $999.29 Regular priceUnit price per -
Vendor:GSC Power DivisionGSC S3 Billet Camshaft Set for the 04-07 STI, 06-14 WRX, 04-13 FXT, 05-12 LGT with Intake AVCS
Regular price $999.28Sale price $999.28 Regular priceUnit price per -
Up to $186.82 OFFVendor:GSC Power DivisionGSC S1 Billet Camshaft Set for the 2008-21 Subaru STI with Dual AVCS
Regular price $1,058.68Sale price $1,058.68 Regular priceUnit price per$1,245.50
Cylinder Heads & Parts
Shop Subaru cylinder heads and valvetrain components at IAG Performance for 2002–2023 Subaru WRX, STI, Legacy GT, Forester XT, and BRZ models. Our selection includes high-quality Subaru cylinder head parts designed for EJ20, EJ25, and FA20 engines, whether you're performing routine maintenance, upgrading valvetrain components, or building a high-performance Subaru engine. Browse a wide range of Subaru cylinder head upgrades and replacement parts including ported head packages, camshafts, cam sprockets, valves, valve springs, retainers, valve guides, gaskets, seals, timing chains, head hardware, and other essential valvetrain components. These parts are engineered to support everything from reliable daily driving to high-horsepower Subaru WRX and STI engine builds. IAG Performance carries cylinder head parts and valvetrain components from many of the most trusted names in the Subaru performance community. Featured brands include AEM, Brian Crower, GSC Power Division, IAG Performance, JE Pro Seal, Kelford Cams, Killer B Motorsport, Manley Performance, Subaru OEM, Turnin Concepts, and more. Whether you're refreshing your Subaru cylinder heads or building a fully upgraded EJ or FA engine, IAG Performance offers the parts and expertise to support your Subaru WRX, STI, Legacy GT, Forester XT, or BRZ build.