HKS 13-20 Subaru BRZ FA20 2.1L Low-Comp Step 2 Full Kit (Forged Pistons, I-Beam Con Rod, Crankshaft)

Genuine HKS performance part — part number 21004-AT004.

HKS is Japan's premier aftermarket performance manufacturer, engineering turbochargers, exhausts, suspension, engine internals, and electronics for street and motorsport use.