You will use many fittings to plumb your vehicle. Why not consider Redhorse Performance gauge adapters to do the job properly? Their 9196 Series gauge adapters are made from lightweight aluminum and anodized for a durable finish. They are available in different AN sizes with 1/8 in. NPT ports to deliver the precision your project needs. Order the Redhorse 9196 90 degree gauge adapters in the size and finish you need.