CPR RACING AN fittings and Fasteners are manufactured in the Motorcity from high-quality aluminum and are anodized for protection against corrosion. CPR RACING AN to straight cut O-ring fittings are available in different configurations and styles, so you can use them throughout your vehicle. Whether you need bulkheads, tees, unions, reducers, swivels, couplers, or elbows to complete your plumbing job.