Quick view IAG Performance IAG Stage 1 Cylinder Head Package For 06-14 WRX, 04-20 STI, 04-13 FXT, 05-09 LGT (Cams / Lifters Sold Separately) Availability: Usually Ships in 2 to 3 Weeks Compare $2,599.99 IAG Stage 1 Cylinder Head Package: IAG's Stage 1 cylinder heads are intended for those looking for a cost-effective OEM+ replacement. Each package starts with brand new WRX STI OEM head castings, directly from Subaru of America. The bare castings are... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 1 Cylinder Head Package w/ GSC S1 Cams For 06-14 WRX, 04-20 STI, 04-13 FXT, 05-09 LGT Availability: Usually Ships in 2 to 3 Weeks Compare $4,199.99 IAG 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 STI OEM head castings, directly from Subaru of America. The... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 2 Pocket Ported Cylinder Heads For Subaru 06-14 WRX, 07-20 STI, 06-13 FXT, 07-09 LGT (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $3,199.99 IAG Stage 2 Pocket Port Cylinder Head Package: The head package centers around our popular CNC pocket porting program which was developed over the last several years. Pocket porting removes excess OEM casting flash and the material underneath the valves... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 2 Pocket Ported Heads w/ GSC S2 Cams For 06-14 Subaru WRX, 07-20 STI, 06-13 FXT, 07-09 LGT Availability: Usually Ships in 6 to 8 Weeks Compare $4,699.99 IAG Stage 2 Pocket Port Cylinder Head & Cam Package: The head package centers around our popular CNC pocket porting program which was developed over the last several years. Pocket porting removes excess OEM casting flash and the material underneath... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves For 06-14 WRX, 07-20 STI, 06-13 FXT, 07 LGT (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $3,299.99 IAG Stage 3 Pocket Port Cylinder Head Package: The head package centers around our popular CNC pocket porting program which was developed over the last several years. Pocket porting removes excess OEM casting flash and the material underneath the valves... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 3 Pocket Ported Heads w/ +1mm GSC Valves For 06-14 WRX, 07-20 STI, 06-13 FXT, 07-09 LGT Availability: Usually Ships in 6 to 8 Weeks Compare $4,999.99 IAG Stage 3 Pocket Port Cylinder Head & Cam Package: The head package centers around our popular CNC pocket porting program which was developed over the last several years. Pocket porting removes excess OEM casting flash and the material underneath... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 4 2015-19 WRX AW20 Ported Cylinder Head Package (Cams / Rockers / Lash Caps Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $4,199.99 IAG's Stage 4 Cylinder Head Package for the 2015-20 WRX utilizes a CNC porting program for the AW20 heads which was developed over the past year and tested on the most successful high-horsepower Subaru's. The ported head package starts with brand new... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves & Camshafts for 02-05 WRX 2.0L S20 Availability: Usually Ships in 6 to 8 Weeks Compare MSRP: $5,499.99 - $5,699.99 IAG Stage 4 S20 Ported Heads with +1mm GSC Valves & Cams: IAG's Stage 4 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 Subaru's. The... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves & GSC Camshafts For 06-14 WRX, 07-20 STI, 06-13 FXT, 07-09 LGT Availability: Usually Ships in 6 to 8 Weeks Compare $5,699.99 IAG Stage 4 Ported Heads with +1mm GSC Valves & Cams: IAG's Stage 4 Cylinder Head Package utilizes a CNC porting program for the WRX STI heads that was developed over the past five years and tested on the most successful high-horsepower Subaru's. The... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves for 02-05 WRX 2.0L S20 (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare MSRP: $4,199.99 - $4,449.99 IAG's Stage 4 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 Subaru's. The ported head package starts with brand new S20 WRX OEM head... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 4 CNC Ported Heads w/ +1mm GSC Valves For 06-14 WRX, 07-20 STI, 06-13 FXT, 07-09 LGT (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $4,199.99 IAG Stage 4 CNC Ported Heads with +1mm GSC Valves: IAG's Stage 4 Cylinder Head Package utilizes a CNC porting program for the WRX STI heads that was developed over the past five years and tested on the most successful high-horsepower Subaru's. The ported... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 5 2015-20 WRX AW20 Ported Cylinder Head Package (Cams / Rockers / Lash Caps Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $5,249.99 IAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the AW20 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 AW20 FA20 WRX DIT... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves For 06-14 WRX, 07-20 STI, 06-10 FXT, 07-09 LGT (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare $5,249.99 IAG Stage 5 CNC Ported Cylinder Heads w/ +1mm Ferrea Valves: IAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the WRX STI heads that was developed over the past five years and tested on the most successful high-horsepower Subaru's... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 5 CNC Ported Heads w/ +1mm Ferrea Valves & S3 GSC Cams for 07-20 STI, 08-14 WRX, 07-12 LGT, 09-13 FXT Availability: Usually Ships in 6 to 8 Weeks Compare $6,799.99 IAG Stage 5 CNC Ported Cylinder Heads: IAG's Stage 5 Cylinder Head Package utilizes a CNC porting program for the Subaru WRX STI heads that was developed over the past five years and tested on the most successful high-horsepower Subaru's. The ported head... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 5 02-05 WRX S20 Casting Cylinder Head Package (Cams / Lifters Sold Separately) Availability: Usually Ships in 6 to 8 Weeks Compare MSRP: $5,249.99 - $5,499.99 IAG'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 Subaru's. The ported head package starts with brand new S20 2002-05 WRX 2... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List
Quick view IAG Performance IAG Stage 5 02-05 WRX S20 Casting Cylinder Head Package (Includes Cams / Lifters) Availability: Usually Ships in 6 to 8 Weeks Compare MSRP: $6,799.99 - $6,999.99 IAG'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 Subaru's. The ported head package starts with brand new S20 2002-05 WRX... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List