Collection: Auto - AN Fittings

Plumb your fuel, oil, or coolant systems like a pro with our premium selection of auto AN fittings. Whether you need heavy-duty swivel hose ends, high-flow adapters, specialized bulkhead fittings, or crush washers for a leak-free seal, DIY Customs offers top-tier performance plumbing at unbeatable prices. Don't see the exact size (-4AN to -20AN), angle, or finish you need for your custom engine build? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your garage or doorstep!