{"product_id":"holley-efi-select-up-to-4-different-tunes","title":"Holley EFI Select up to (4) different tunes","description":"Designed to be used with the Holley Dominator EFI systems with multiple maps to select between up to four different types of tunes. These tunes can be used for many purposes, ranging from using certain fuel types, track conditions, and using nitrous setups. The switch is connected into the J3 ECU connector, with the calibrations being selected at in the vehicle key-on startup.\u003cp\u003e\u003cbr\u003eShop high-quality truck parts, auto parts, and performance accessories engineered for strength, reliability, and a precise fit. Each component we carry is carefully vetted for durability, safety, and real-world performance—meeting or exceeding OEM standards. Whether you’re replacing worn parts, upgrading suspension systems, or adding off-road equipment, Truck \u0026amp; Auto Parts Store provides trusted OEM and aftermarket brands designed to handle the demands of trucks, SUVs, and 4x4s. With expert support, fast U.S. shipping, and a commitment to customer satisfaction, you can order with confidence knowing every product delivers dependable performance on the road and off.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":51487346393304,"sku":"GVMR_558-407","price":172.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0684\/3180\/6680\/files\/558-407_01.jpg?v=1773945368","url":"https:\/\/www.truckandautopartsstore.com\/products\/holley-efi-select-up-to-4-different-tunes","provider":"Truck \u0026 Auto Parts Store","version":"1.0","type":"link"}