DBA 02-10 WRX / 13+ FR-S / 13+ BRZ Premium Front Drilled & Slotted 5000 Series Rotor w/ Gold Hat 2015-subaru-impreza-limited IAG's Stage 4 Cylinder Head

IAG's Stage 4 Cylinder Head Package utilizes a CNC porting program for the V25 heads that was developed over the past five years and tested on the most successful high-horsepower Subarus

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The Stage 4 Extreme block features 14mm head stud machining as well as our Fire-Lock gasket solution

They are then outfitted with complete Ferrea valve train components including +1mm oversized Comp Plus intake and exhaust valves

DBA 02-10 WRX / 13+ FR-S / 13+ BRZ Premium Front Drilled & Slotted 5000 Series Rotor w/ Gold Hat 2015-subaru-impreza-limited IAG's Stage 4 Cylinder HeadDBA 02 10 WRX 13+ FR S 13+ BRZ Premium Front Drilled & Slotted 5000 Series Rotor w Gold Hat DBA 5000 Series XS rotors share all the same leading technology as our 4000 Series, but in a two piece rotor. With an aluminum hat for lighter weight, better heat dissipation and lower maintenance costs these are the perfect sport rotor.