Collection: Auto - Idle Mixture

Fine-tune your engine's performance and achieve the perfect air-fuel ratio with our selection of Auto Idle Mixturecomponents. At DIY Customs, we provide precision-machined idle mixture screws, durable needle valves, specialized carburetor adjustment tools, and heavy-duty O-rings and springs designed for a perfect fit. Whether you are dialling in a classic Holley or Edelbrock carb for better throttle response, replacing a stripped mixture screw during a rebuild, or troubleshooting a rough idle in your project car, our professional-grade hardware offers the adjustment sensitivity you need at unbeatable prices. From specialized "easy-grip" thumb screws for tool-free tuning to complete carburetor service kits, we carry the essential gear to keep your engine purring. Don't see the specific thread pitch, needle taper, or specialized tuning tool for your carburetor model? 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 doorstep!