Grimmspeed StealthBox Cold Air Intake BLACK - Subaru 15-21 WRX - 060060 919 Series 0 4G63T 1st Gen 6-Bolt

0 4G63T 1st Gen 6-Bolt

We wanted to develop a knob that was not only weighted and great looking but also fit into the palm of your hand comfortably

It's easy to see that the engine reaches redline faster and drops to idle faster with the GrimmSpeed Lightweight Crank Pulley installed

15-18 Subaru WRX STI 2

Grimmspeed StealthBox Cold Air Intake BLACK - Subaru 15-21 WRX - 060060 919 Series 0 4G63T 1st Gen 6-BoltInspiration for the StealthBox Intake came from internal discussions about what we wanted from an intake system for the 2015+ WRX. Of course performance is the highest priority, but at GrimmSpeed so much more than that goes into a product. We wanted an intake that purred quietly under normal driving circumstances, but would roar at wide open throttle. We wanted an intake that looked at home in the well sported 2015+ WRX engine bay instead of a shoebox