Cylinder Heads
IAG Stage 4 Cylinder Heads w/ +1mm Valves, GSC S3 Cams & Combustion Chamber Mod (S20), '02-'05 WRX
$6,199.99 $5,579.99
IAG Stage 4 Cylinder Heads w/ +1mm Valves & GSC S3 Cams (D25 Casting), '06-'14 WRX
$6,299.99 $5,669.99
IAG Stage 3 Cylinder Heads w/ +1mm GSC Valves (No Cams/Buckets, D25 Casting), '06-'14 WRX
$3,629.99 $3,266.99
IAG Stage 3 Cylinder Heads w/ +1mm GSC Valves (No Cams/Buckets, V25 Casting), '07 STi
$3,629.99 $3,266.99
IAG Stage 3 Cylinder Heads w/ +1mm GSC Valves & S2 Cams (W25 Castings), '08-'18 STi
$5,499.99 $4,949.99
IAG Stage 4 Cylinder Heads w/ +1mm Valves & GSC S3 Cams (S20 Casting), '02-'05 WRX
$5,999.99 $5,399.99
IAG Stage 4 Cylinder Heads w/ +1mm Valves & GSC S3 Cams (W25 Casting), '08-'18 STi
$6,299.99 $5,669.99
IAG 1000 CNC Ported Drag Cylinder Heads (No Cams/Towers/Lifters/Rockers), '15-'21 WRX
$4,999.99 $4,499.99
IAG 1150 CNC Ported Drag D25 Cylinder Heads w/ GSC S2 Cams & Lifters, '06-'14 WRX
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag D25 Cylinder Heads w/ GSC S3 Cams & Lifters, '06-'14 WRX
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag S20 Cylinder Heads w/ Combustion Mod (No Cams / Lifters), '02-'05 WRX
$5,999.99 $5,399.99
IAG 1150 CNC Ported Drag S20 Cylinder Heads w/ Combustion Mod & GSC S2 Cams & Lifters, '02-'05 WRX
$7,699.99 $6,929.99
IAG 1150 CNC Ported Drag S20 Cylinder Heads w/ Combustion Mod & GSC S3 Cams & Lifters, '02-'05 WRX
$7,699.99 $6,929.99
IAG 1150 CNC Ported Drag S20 Cylinder Heads w/ GSC S2 Cams & Lifters, '02-'05 WRX
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag S20 Cylinder Heads w/ GSC S3 Cams & Lifters, '02-'05 WRX
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag V25 Cylinder Heads w/ GSC S2 Cams & Lifters, '04-'07 STi
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag V25 Cylinder Heads w/ GSC S3 Cams & Lifters, '04-'07 STi
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag W25 Cylinder Heads w/ GSC S2 Cam & Lifters, '08-'18 STi
$7,499.99 $6,749.99
IAG 1150 CNC Ported Drag W25 Cylinder Heads w/ GSC S3 Cam & Lifters, '08-'18 STi
$7,499.99 $6,749.99
IAG 550 Street S20 Cylinder Heads w/ Combustion Mod (No Cams / Lifters), '02-'05 WRX
$3,199.99 $2,879.99
IAG 550 Street S20 Cylinder Heads w/ Combustion Mod & GSC S1 Cams & Lifters, '02-'05 WRX
$4,899.99 $4,409.99
IAG 600 Street Cylinder Heads w/ Kelford EZ Cams & Cam Towers/Lifters/Rockers, '15-'21 WRX
$5,699.99 $5,129.99
IAG 750 CNC Pocket Ported D25 Competition Cylinder Heads (No Cams & Lifters), '06-'14 WRX
$3,799.99 $3,419.99
IAG 750 CNC Pocket Ported D25 Competition Cylinder Heads w/ GSC S1 Cams & Lifters, '06-'14 WRX
$5,699.99 $5,129.99
IAG 750 CNC Pocket Ported S20 Competition Cylinder Heads (No Cams / Lifters), '02-'05 WRX
$3,799.99 $3,419.99
IAG 750 CNC Pocket Ported S20 Competition Cylinder Heads w/ GSC S1 Cams & Lifters, '02-'05 WRX
$5,699.99 $5,129.99
IAG 750 CNC Pocket Ported V25 Competition Cylinder Heads (No Cams & Lifters), '04-'07 STi
$3,799.99 $3,419.99
IAG 750 CNC Pocket Ported V25 Competition Cylinder Heads w/ GSC S1 Cams & Lifters, '04-'07 STi
$5,699.99 $5,129.99