Instead of just cutting off the plugs and leaving loose wires when doing a TGV (tumble generator valve) modification, it's better to cap the plugs with these blank covers. This cap set from iWire allows for future expansion of features while still protecting the TGV plugs from electrical shorts, moisture, and corrosion. Plus, it looks better than a messy ball of electrical tape.

Set of two plug caps.

Fits all 2008-2014 Subaru WRX and 2008 WRX STI. Also fits similar vintage turbo Forester and Legacy models.