{"product_id":"apr-ecu-upgrade-2-5t-ea855-evo-8y-rs3","title":"APR ECU Upgrade - 2.5T EA855 EVO (8Y) (RS3)","description":"\u003cp\u003eUnleash the True Potential of Your Audi RS3 (8Y) and Cupra Formentor VZ5\u003c\/p\u003e\n\u003cp\u003eWe're thrilled to introduce APR's Engine Control Unit (ECU) Upgrades for the powerful 2.5 TFSI EA855 EVO engine found in the Audi RS3 (8Y) and Cupra Formentor VZ5! With up to 550 HP and 511 FT-LBS of torque, this upgrade transforms your car into a performance powerhouse, delivering exhilarating power and unmatched driving excitement.\u003c\/p\u003e\n\u003cp\u003ePower. Precision. Protection.\u003cbr\u003eOur new ECU software is the result of months of meticulous engineering and real-world testing, far surpassing the typical aftermarket solution. By equipping our development vehicles with high-speed data loggers, turbo shaft speed sensors, thermocouples, and other precision instruments, we fine-tuned hundreds of parameters and corrected countless protection models across multiple octanes to achieve flawless performance, enhanced safety, and unmatched reliability. We're so confident in its reliability that we even offer an optional factory term-limit matching limited powertrain warranty with APR Plus!\u003c\/p\u003e\n\u003cp\u003eWhat does that mean for you?\u003cbr\u003eIt means blistering acceleration with gains of up to +119 AWHP and +135 AWFT-LBS over stock with just tuning alone, and even more with our hardware upgrades! This tuning package delivers a rush of power that transforms your driving experience. With the right surface prep and tires this is a sub 3 second 0-60 car capable of 10 second quarter mile passes that will drop your stomach and pin your back to your seat like never before! You'll enjoy smooth, linear throttle response and a torque curve that feels endless, providing relentless pull across the rev range. Race-proven features like brake boosting and speed limiter removal unlock new levels of control-perfect for track days or spirited driving. All of this is backed by advanced safety routines that ensure your engine remains protected, even under the most demanding conditions.\u003c\/p\u003e\n\u003cp\u003ePerformance without compromise\u003cbr\u003eOur ECU upgrade includes advanced safety features that go above and beyond by correcting modeled sensor data within the ECU and enabling and calibrating new protection routines. We've optimized turbocharger protection by monitoring shaft speed and respecting overspinning limits, excessive exhaust backpressure, and unstable pressure ratios. Low-speed pre-ignition (LSPI) protection prevents engine damage in high gears. Thermal management actively reduces power to prevent overheating of critical components and reduces power until your oil reaches the proper temperature. Fuel system optimization ensures safe, reliable operation within critical fueling limits. The result? Massive power gains with the confidence that your engine and drivetrain are protected for the long haul.\u003c\/p\u003e\n\u003cp\u003eEnhanced Driving Experience\u003cbr\u003eWe didn't stop at raw power-APR's ECU upgrade enhances every aspect of your driving experience. To truly experience the sound of this engine we open the exhaust valves 100% above 3,000 RPM for sound and power delivery. Furthermore we've calibrated a new light exhaust crackle that's similar to previous factory RS3 models. In park we additionally raised the standing rev limiter to 5,500 RPM, open the valves 100% during revving, and added the exhaust crackle. \u003c\/p\u003e\n\u003cp\u003eFurthermore, we've added left-foot braking and brake boosting for greater control on and off the track, while the speed limiter removal unleashes your car's full top-speed potential. The Auto Start\/Stop memory ensures your preferred setting is always ready, putting you in control every time you start the car. Finally, we've recalibrated the boost, power and torque gauges so you can see the full range present at higher power levels!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul class=\"productpage_list\"\u003e\n\u003cli\u003ePower Gains: Up to 550 HP \/ 511 FT-LBS (+153 AWHP \/ +141 AWFT-LBS)\u003c\/li\u003e\n\u003cli\u003eIncludes 7 Fuel Grade Tunes: 91 AKI (95 RON), 93 AKI (98 RON), 96 AKI (100 RON), 98 AKI (102 RON), 100 AKI (104 RON), 104 AKI (108 RON), and E60-E85 (no hardware required)\u003c\/li\u003e\n\u003cli\u003eMultiple Performance Stages: Specific tunes for use with stock and modified hardware\u003c\/li\u003e\n\u003cli\u003eAPR Plus: 91 AKI Stage 1 with an optional factory-matching limited powertrain warranty\u003c\/li\u003e\n\u003cli\u003eEnhanced Features: Enhanced exhaust note\/crackle with fully open valves, increased standing RPM limiter with exhaust crackle and fully opened valves, speed limiter removal, Auto Start\/Stop memory, left-foot brake boosting, linear throttle mapping, and unc\u003c\/li\u003e\n\u003cli\u003eAdvanced Safety Protection Routines: LSPI\/knock protection, thermal management, turbo\/pressure quotients, and fuel system protection\u003c\/li\u003e\n\u003cli\u003eECU Swap: Our software installs to an unlocked ECU\u003c\/li\u003e\n\u003cli\u003eLifetime Updates: Continuous improvements and support\u003c\/li\u003e\n\u003cli\u003eSupports Bolt-On Mods: Adding most hardware upgrades increases power and maximize performance with our software stages\u003c\/li\u003e\n\u003cli\u003eNo TCU Required: Full torque is unlocked without requiring a TCU upgrade\u003c\/li\u003e\n\u003cli\u003eSoftware 30-Day Money-Back Guarantee\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv id=\"tab-widget-stage-1\" class=\"tab-widget-panel ui-tabs-panel ui-corner-bottom ui-widget-content\" aria-labelledby=\"ui-id-4\" role=\"tabpanel\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"widget html\"\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"widget-content\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe APR Stage 1 ECU upgrade works with the factory turbocharger, producing up to 524 HP \/ 506 FT-LBS (+119 AWHP \/ +135 AWFT-LBS) over stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eLow torque (flatter torque curve with less low end torque)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eNo transmission software required for full output files.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFuel Grades:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003e91 AKI (95 RON), 93 AKI (98 RON), 96 AKI (100 RON)*, 98 AKI (102 RON)*, 100 AKI (104 RON), 104 AKI (108 RON), and E60-E85 Ethanol.\u003c\/li\u003e\n\u003cli\u003eHigher fuel grades are permissible on lower octane software.\u003c\/li\u003e\n\u003cli\u003e*ROW Market Only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHardware Requirements:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eNo hardware required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAPR Plus Warranty:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eOptional limited powertrain warranty for 91 AKI in the USA\/Canada. Requires original factory or APR-approved hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"tab-widget-stage-2-intake--intercooler\" class=\"tab-widget-panel ui-tabs-panel ui-corner-bottom ui-widget-content\" aria-labelledby=\"ui-id-5\" role=\"tabpanel\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"widget html\"\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"widget-content\"\u003e\n\u003cp\u003eThe APR Stage 2 ECU upgrade works with the factory turbocharger with an APR intake and APR Intercooler, producing up to 550 HP \/ 511 FT-LBS (+153 AWHP \/ +141 AWFT-LBS) over stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eLow torque (flatter torque curve with less low end torque)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eNo transmission software required for full output files.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFuel Grades:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003e91 AKI (95 RON), 93 AKI (98 RON), 96 AKI (100 RON)*, 98 AKI (102 RON)*, 100 AKI (104 RON), 104 AKI (108 RON), and E60-E85 Ethanol.\u003c\/li\u003e\n\u003cli\u003eHigher fuel grades are permissible on lower octane software.\u003c\/li\u003e\n\u003cli\u003e*ROW Market Only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHardware Requirements:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-unordered\"\u003e\n\u003cli\u003eAPR intake system and APR intercooler system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"title\"\u003eAPR Calibration Report\u003c\/h2\u003e\n\u003ctable class=\"comparison_table\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStage\u003c\/th\u003e\n\u003cth\u003eHP\u003c\/th\u003e\n\u003cth\u003eTQ\u003c\/th\u003e\n\u003cth\u003eMax Gain\u003c\/th\u003e\n\u003cth\u003eMax Gain\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock As Reported by Cupra (95 RON) \u003c\/td\u003e\n\u003ctd\u003e385 HP\u003c\/td\u003e\n\u003ctd\u003e354 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock As Reported by Audi (91 AKI) \u003c\/td\u003e\n\u003ctd\u003e401 HP\u003c\/td\u003e\n\u003ctd\u003e369 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStock As Measured by APR (RS3) (93 AKI) \u003c\/td\u003e\n\u003ctd\u003e412 HP\u003c\/td\u003e\n\u003ctd\u003e381 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAPR Plus\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e91 AKI \/ 95 RON\u003c\/td\u003e\n\u003ctd\u003e446 HP\u003c\/td\u003e\n\u003ctd\u003e454 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+59 AWHP\u003c\/td\u003e\n\u003ctd\u003e+93 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStage 1\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e91 AKI \/ 95 RON\u003c\/td\u003e\n\u003ctd\u003e446 HP\u003c\/td\u003e\n\u003ctd\u003e454 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+59 AWHP\u003c\/td\u003e\n\u003ctd\u003e+93 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e93 AKI \/ 98 RON\u003c\/td\u003e\n\u003ctd\u003e462 HP\u003c\/td\u003e\n\u003ctd\u003e477 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+75 AWHP\u003c\/td\u003e\n\u003ctd\u003e+102 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e96 AKI \/ 100 RON\u003c\/td\u003e\n\u003ctd\u003e477 HP\u003c\/td\u003e\n\u003ctd\u003e482 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+82 AWHP\u003c\/td\u003e\n\u003ctd\u003e+113 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e98 AKI \/ 102 RON\u003c\/td\u003e\n\u003ctd\u003e487 HP\u003c\/td\u003e\n\u003ctd\u003e482 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+84 AWHP\u003c\/td\u003e\n\u003ctd\u003e+113 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 AKI \/ 104 RON\u003c\/td\u003e\n\u003ctd\u003e499 HP\u003c\/td\u003e\n\u003ctd\u003e492 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+97 AWHP\u003c\/td\u003e\n\u003ctd\u003e+122 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e104 AKI \/ 108 RON\u003c\/td\u003e\n\u003ctd\u003e508 HP\u003c\/td\u003e\n\u003ctd\u003e502 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+106 AWHP\u003c\/td\u003e\n\u003ctd\u003e+131 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eE60-E85 Ethanol\u003c\/td\u003e\n\u003ctd\u003e524 HP\u003c\/td\u003e\n\u003ctd\u003e506 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+119 AWHP\u003c\/td\u003e\n\u003ctd\u003e+135 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStage 2 with Intake and Intercooler\u003c\/th\u003e\n\u003cth\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e91 AKI \/ 95 RON\u003c\/td\u003e\n\u003ctd\u003e467 HP\u003c\/td\u003e\n\u003ctd\u003e460 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+69 AWHP\u003c\/td\u003e\n\u003ctd\u003e+97 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e93 AKI \/ 98 RON\u003c\/td\u003e\n\u003ctd\u003e487 HP\u003c\/td\u003e\n\u003ctd\u003e479 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+84 AWHP\u003c\/td\u003e\n\u003ctd\u003e+104 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e96 AKI \/ 100 RON\u003c\/td\u003e\n\u003ctd\u003e497 HP\u003c\/td\u003e\n\u003ctd\u003e489 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+98 AWHP\u003c\/td\u003e\n\u003ctd\u003e+120 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e98 AKI \/ 102 RON\u003c\/td\u003e\n\u003ctd\u003e508 HP\u003c\/td\u003e\n\u003ctd\u003e489 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+105 AWHP\u003c\/td\u003e\n\u003ctd\u003e+120 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 AKI \/ 104 RON\u003c\/td\u003e\n\u003ctd\u003e520 HP\u003c\/td\u003e\n\u003ctd\u003e499 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+118 AWHP\u003c\/td\u003e\n\u003ctd\u003e+130 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e104 AKI \/ 108 RON\u003c\/td\u003e\n\u003ctd\u003e529 HP\u003c\/td\u003e\n\u003ctd\u003e509 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+127 AWHP\u003c\/td\u003e\n\u003ctd\u003e+139 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eE60-E85 Ethanol\u003c\/td\u003e\n\u003ctd\u003e550 HP\u003c\/td\u003e\n\u003ctd\u003e511 FT-LBS\u003c\/td\u003e\n\u003ctd\u003e+153 AWHP\u003c\/td\u003e\n\u003ctd\u003e+141 AWFT-LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eTech Resources:\u003c\/h3\u003e\n\u003cdiv class=\"row-contents active expanded\" style=\"max-height: 731px; opacity: 1; padding-bottom: 30px;\"\u003e\n\u003cdiv class=\"widget_info\"\u003e\n\u003cdiv class=\"tech_icons fas fa-info-circle fa-2x\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"widget_text\"\u003e\u003ca class=\"tech_resource_widget_link\" href=\"https:\/\/www.goapr.com\/sfd\/\" rel=\"noopener\" title=\"View Important SFD Unlock Guide\" target=\"_blank\"\u003eImportant SFD Unlock Guide\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"widget_info\"\u003e\n\u003cdiv class=\"tech_icons fas fa-info-circle fa-2x\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"widget_text\"\u003e\u003ca class=\"tech_resource_widget_link\" href=\"https:\/\/www.goapr.com\/support\/fuel_guide\/\" rel=\"noopener\" title=\"View Important fuel quality information\" target=\"_blank\"\u003eImportant fuel quality information\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"widget_info\"\u003e\n\u003cdiv class=\"tech_icons fas fa-info-circle fa-2x\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"widget_text\"\u003e\u003ca class=\"tech_resource_widget_link\" href=\"https:\/\/www.goapr.com\/support\/ecu_box_code\/\" rel=\"noopener\" title=\"View Find your boxcode and revision\" target=\"_blank\"\u003eFind your boxcode and revision\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"widget_info\"\u003e\n\u003cdiv class=\"tech_icons fas fa-info-circle fa-2x\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"widget_text\"\u003e\u003ca class=\"tech_resource_widget_link\" href=\"https:\/\/documents.goapr.com\/customer_warranty_booklet.pdf\" rel=\"noopener\" title=\"View APR Plus Warranty Booklet\" target=\"_blank\"\u003eAPR Plus Warranty Booklet\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"widget_info\"\u003e\n\u003cdiv class=\"tech_icons fas fa-exclamation-triangle fa-2x\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"widget_text installation_notes product_info\"\u003eAn ECU unlock is required to install this software and is only available at Authorized APR Dealers. To unlock your ECU: 1. Schedule an appointment with an authorized APR dealer. 2. The dealer will scan your vehicle, and we'll ship them an unlocked ECU. 3. The dealer will install the unlocked ECU, install your APR software, and return your original ECU to us. You'll purchase the tune \u0026amp; $999.95 unlock from the dealer during the install. If your ECU is not sent to us within 15 days, we will charge a $1499.95 core charge. Unlocked ECUs can install new updates, new stages, or different options or octanes without requiring another unlock. However, if the ECU is flashed back to stock by the Audi or APR dealer, it will relocked and require a new unlock. Use only fuel equal to or higher than specified-never lower. Follow our fuel guide, particularly for race fuel and Ethanol. Dyno results are for reference only and will vary due to vehicle condition, setup, dyno type, environmental factors, and fuel quality. North America uses the Anti-Knock Index (AKI) (RON+MON)\/2, while the Rest of the World (ROW) uses RON. Each vehicle's year, make, and model may have multiple engine or transmission controller software part numbers (\"box codes\") with unique revisions. Manufacturers release updates that alter these codes, which can only be verified by scanning the controller. Some stages, octane levels, or features may not be available for specific box codes. Our website provides a general guide by Year, Make, and Model, but you can request unavailable software. A 30-day money-back guarantee applies if you're not satisfied.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APR","offers":[{"title":"Default Title","offer_id":47273549234353,"sku":"ECU-25T-EA855-EVO-8Y","price":1078.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/1379\/3201\/files\/apr-ecu-box_0a8d0012-9310-429f-8587-bdd6164fc997.webp?v=1778531403","url":"https:\/\/hstuning.com\/products\/apr-ecu-upgrade-2-5t-ea855-evo-8y-rs3","provider":"HS Tuning ","version":"1.0","type":"link"}