There's been some talk of where to install additional gauges. Personally, I think A pillar and air vent gauges take away from the OEM finish, let alone the instrument cluster blocking ones. I thought I'd share my chosen oil pressure gauge location down in the change drawer by the driver's right knee. It's a great choice as it maintains, complements even, the OEM finish, is right next to the fuse box to run a live, and also directly underneath the hole in the firewall through the ECU box to run the sender wire. The readout is easily read through the steering wheel when driving.