{"product_id":"southwest-speed-afm-dfm-disabler-for-gm-v6-v8-full-power","title":"Southwest Speed AFM-DFM Disabler for GM V6 \u0026 V8 - Full Power","description":"\u003cp\u003eIn this review of the Southwest Speed New Range Technology AFM-DFM Disabler, the bottom line is simple: this small blue device is for GM owners who want consistent, full-cylinder performance without reprogramming the factory ECU. The reviewer found the plug-and-play approach compelling because it immediately prevents the Active or Dynamic Fuel Management system from dropping cylinders, restoring predictable throttle response and power delivery. For drivers who prioritize full-time power for towing, spirited driving, or consistent load handling, this disabler delivers that outcome while leaving no trace when removed.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-play OBD-II connection:\u003c\/strong\u003e Instantly begins working when plugged into the onboard port, so no special tools or ECU flashing are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains full-cylinder operation:\u003c\/strong\u003e Keeps V6 and V8 GM motors running in full power mode at all times for consistent throttle response and towing capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo ECU reprogramming:\u003c\/strong\u003e Uses patented technology to disable AFM\/DFM without altering factory calibration, reducing warranty concern risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable without trace:\u003c\/strong\u003e Can be unplugged to return the vehicle to factory AFM\/DFM behavior, useful for diagnostics or resale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduced by Holley Performance Products:\u003c\/strong\u003e Manufactured as part number RA003B, indicating established performance-focused production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact, durable design:\u003c\/strong\u003e Small blue unit that fits under dashboards and is out of the way after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is best for owners of General Motors V6 and V8 vehicles equipped with Active Fuel Management or Dynamic Fuel Management who want uninterrupted cylinder operation for towing, hauling, or improved driving feel. Enthusiasts who prefer a reversible, non-invasive solution will appreciate that it does not reflash the ECU and can be removed to restore factory behavior.\u003c\/p\u003e\u003cp\u003eIt is less appropriate for drivers looking to alter engine performance beyond disabling AFM\/DFM, or for vehicles not listed as compatible. Customers who need full aftermarket tuning capability or emission code changes should look at dedicated tuners instead.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSimple installation via the OBD-II port makes it accessible to most owners.\u003c\/li\u003e\n\u003cli\u003eProvides continuous full power by preventing cylinder deactivation.\u003c\/li\u003e\n\u003cli\u003eNo permanent ECU changes means fewer factory warranty concerns.\u003c\/li\u003e\n\u003cli\u003eCompact form factor keeps the device discreet after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDoes not provide broader tuning features; it only disables AFM\/DFM.\u003c\/li\u003e\n\u003cli\u003eNot compatible with non-GM engines or systems not using factory AFM\/DFM logic.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRange Technology\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ Part\u003c\/td\u003e\n\u003ctd\u003eRA003B (produced by Holley Performance Products)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Engines\u003c\/td\u003e\n\u003ctd\u003eV6 and V8 GM motors with AFM\/DFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003ePlug into OBD-II port, no ECU reprogramming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTuner \/ Disabler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmission Code\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Southwest Speed Range Technology AFM-DFM Disabler is a practical, reversible solution for GM V6 and V8 owners who want consistent full-cylinder performance without ECU reflashing. It represents good value for drivers needing reliable towing and throttle response improvements while retaining the ability to restore factory settings by unplugging the unit.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this reprogram my ECU?\u003c\/strong\u003e\u003cbr\u003eNo, the device does not reprogram the factory ECU; it disables AFM\/DFM without permanent changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is it installed?\u003c\/strong\u003e\u003cbr\u003eInstallation is plug-and-play: insert the disabler into the vehicle OBD-II port and it begins working immediately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich vehicles are supported?\u003c\/strong\u003e\u003cbr\u003eCompatible with GM cars, trucks, and SUVs that use Active or Dynamic Fuel Management on V6 and V8 engines.\u003c\/p\u003e","brand":"Range Technology","offers":[{"title":"Default Title","offer_id":48608935772379,"sku":"B089NXGY4K","price":207.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61UctRYoajL._SL1286.jpg?v=1778502489","url":"https:\/\/gearmusthave.com\/products\/southwest-speed-afm-dfm-disabler-for-gm-v6-v8-full-power","provider":"GearMustHave","version":"1.0","type":"link"}