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EJ and FA head studs are the same length and thread size making them effectively interchangeable
Legacy Spec B MY05-09 (6MT TY856)
COBB top mount intercooler kit greatly improves intercooler efficiency and flow in order to achieve a colder denser intake charge
WRX EJ255 MY08-12
piston dimensions
RalliSpec EJ25 Short Block S3 (950bhp) - Race Spec Long Rod 22641AA450 EJ and FA head studsRELY ON RALLISPEC'S 25 YEARS OF SUBARU ENGINE BUILDING EXPERIENCE This is a +2mm length connecting rod version of our Race Spec Standard short block. The longer rod offers several advantages. A longer rod reduces the angularity of the rod and increases the dwell time at TDC. This can potentially increase power and torque and extend useable power over a wider rpm range. The increased dwell time can lead to more complete combustion and reduced
