{"product_id":"katech-gen-v-lt-stage-ii-di-high-flow-fuel-injectors","title":"Katech Gen V LT Stage II DI High-Flow Fuel Injectors","description":"\u003ch3\u003eKatech Gen V LT Stage II DI High-Flow Fuel Injectors\u003c\/h3\u003e \u003cp\u003e\u003cstrong\u003eMaximum Fuel Delivery for High-Horsepower Gen V LT Direct-Injection Applications\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e \u003cp\u003eThe Katech Gen V LT Stage II DI High-Flow Fuel Injectors are engineered for high-horsepower Gen V GM LT engines requiring maximum fuel delivery beyond factory direct-injection injectors. Designed for aggressive naturally aspirated, supercharged, turbocharged, and competition-focused LT applications, these injectors support increased airflow and power demands while maintaining precise fuel control, drivability, and calibration resolution.\u003c\/p\u003e \u003cp\u003eKatech Stage II DI Fuel Injectors are optimized for high-output LT engine combinations where increased fuel capacity, repeatability, and durability are critical. Each injector set is 100% tested, serialized, and dynamically matched to help ensure consistent cylinder-to-cylinder fuel delivery under high-pressure, high-load operating conditions.\u003c\/p\u003e \u003cp\u003eThese direct-injection fuel injectors are intended for maximum-effort street, track day, and competition-derived LT builds when paired with proper ECU calibration and a fuel system matched to the engine combination.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eFeatures \u0026amp; Advantages\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eSupplied as a Matched Set of Eight Direct-Injection Fuel Injectors\u003c\/li\u003e \u003cli\u003eDirect Replacement, Plug-and-Play Injectors Requiring No Additional Accessories for Installation in Compatible Applications\u003c\/li\u003e \u003cli\u003e7.5 mm High-Flow Injector Design for Compatible Gen V LT Direct-Injection Fuel Systems\u003c\/li\u003e \u003cli\u003eUnique 8-Hole OEM-Compatible Spray Pattern for Excellent Drivability, Combustion Quality, and Calibration Stability\u003c\/li\u003e \u003cli\u003e100% Tested at Operating Pressure and Dynamically Matched into Serialized Injector Sets\u003c\/li\u003e \u003cli\u003e71% Greater Flow Capacity than Factory LT1\/L86 Injectors\u003c\/li\u003e \u003cli\u003e51% Greater Flow Capacity than Factory LT4 Injectors\u003c\/li\u003e \u003cli\u003e200 Bar Maximum Recommended Operating Pressure\u003c\/li\u003e \u003cli\u003eSupports Up to 1,400 WHP on Gasoline and Up to 1,000 WHP on E85*\u003c\/li\u003e \u003cli\u003eStage II Configuration for Maximum-Effort Street, Track, and Competition Applications\u003c\/li\u003e \u003cli\u003eSupports Increased Fuel Demand Beyond Factory Injectors\u003c\/li\u003e \u003cli\u003eStable Low-Pulse Control for Improved Drivability and Calibration Accuracy\u003c\/li\u003e \u003cli\u003eCompatible with Gasoline and Ethanol-Based Fuels when Properly Calibrated\u003c\/li\u003e \u003cli\u003eFully Controllable Through the Factory Engine Management System when Properly Calibrated\u003c\/li\u003e \u003cli\u003eSupported by HP Tuners and EFI Live Calibration Platforms\u003c\/li\u003e \u003cli\u003eValidated for High-Pressure, High-Temperature Operating Environments\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eTechnical Overview\u003c\/h3\u003e \u003cp\u003eThe Katech Gen V LT Stage II DI High-Flow Fuel Injectors are designed for compatible Gen V LT direct-injection engine platforms requiring maximum fuel capacity. Injector performance is validated to support stable operation across idle, part-throttle, and wide-open-throttle conditions when properly calibrated.\u003c\/p\u003e \u003cp\u003eEach injector is individually tested at operating pressure and dynamically matched into serialized sets to minimize cylinder-to-cylinder variation. The Stage II injector design provides substantially increased fuel flow capacity compared to factory LT1, L86, and LT4 injectors while maintaining factory ECU controllability when properly calibrated.\u003c\/p\u003e \u003cp\u003eEach set includes eight injectors for V8 Gen V LT applications. These high-flow direct-injection fuel injectors are intended for high-output engine combinations where accurate fuel delivery under load is essential to performance consistency, engine safety, and long-term reliability.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWhy Spray Pattern Matters\u003c\/h3\u003e \u003cp\u003eFuel flow capacity is only one component of injector performance. While increased fuel delivery is necessary to support higher horsepower levels, injector spray pattern plays a critical role in combustion efficiency, drivability, calibration stability, and long-term engine durability.\u003c\/p\u003e \u003cp\u003eAn injector with poor fuel atomization or an improperly designed spray pattern can contribute to poor idle quality, reduced throttle response, increased soot production, elevated knock sensitivity, calibration challenges, and increased noise, vibration, and harshness (NVH). Improper fuel targeting may also result in fuel contacting cylinder walls, potentially contributing to oil dilution and increased engine wear.\u003c\/p\u003e \u003cp\u003eKatech Stage II Fuel Injectors feature a unique 8-hole OEM-compatible spray pattern designed to promote efficient fuel atomization and consistent fuel distribution within the combustion chamber. Combined with increased flow capacity and precise injector characterization, this helps maintain excellent drivability, combustion quality, and calibration control across a wide range of operating conditions.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eSpecifications \u0026amp; Performance Data\u003c\/h3\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eInjector Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eDirect Injection (DI)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eInjector Diameter\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e7.5 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSet of 8 Injectors\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eEngine Platform\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCompatible Gen V GM LT V8 Applications\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eWHP Potential on Gasoline\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUp to 1,400 WHP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eWHP Potential on E85\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUp to 1,000 WHP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFlow Increase vs. Stock LT4 Injector\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e51%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFlow Increase vs. Stock LT1\/L86 Injector\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e71%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMass Flow Rate\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e26.7 g\/s @ 100 bar (Viscor 16A)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eVolume Flow Rate\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e2,214 cc\/min @ 100 bar (n-Heptane)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaximum Recommended Operating Pressure\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e200 bar \/ 20 MPa \/ 2,900 psi\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSpray Pattern\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUnique 8-Hole OEM-Compatible Spray Pattern\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eBatching Tolerance\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e+\/-3%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eTune Required\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSupported Tuning Platforms\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHP Tuners, EFI Live\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cstrong\u003e*Horsepower potential is dependent on complete engine combination, fuel system capacity, fuel type, operating pressure, supporting modifications, and calibration strategy. Advertised horsepower potential is based on properly calibrated applications and may vary.\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e\u003chr\u003e \u003ch3\u003eStage I vs. Stage II Injector Comparison\u003c\/h3\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eStage I\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eStage II\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBest For\u003c\/td\u003e \u003ctd\u003eHigh-output street, track, and moderate forced-induction builds\u003c\/td\u003e \u003ctd\u003eMaximum-effort street, track, supercharged, turbocharged, and competition builds\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eWHP Potential on Gasoline\u003c\/td\u003e \u003ctd\u003eUp to 1,200 WHP\u003c\/td\u003e \u003ctd\u003eUp to 1,400 WHP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eWHP Potential on E85\u003c\/td\u003e \u003ctd\u003eUp to 900 WHP\u003c\/td\u003e \u003ctd\u003eUp to 1,000 WHP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFlow Increase vs. Stock LT4 Injector\u003c\/td\u003e \u003ctd\u003e25%\u003c\/td\u003e \u003ctd\u003e51%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFlow Increase vs. Stock LT1\/L86 Injector\u003c\/td\u003e \u003ctd\u003e45%\u003c\/td\u003e \u003ctd\u003e71%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMass Flow Rate\u003c\/td\u003e \u003ctd\u003e22.1 g\/s @ 100 bar\u003c\/td\u003e \u003ctd\u003e26.7 g\/s @ 100 bar\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eVolume Flow Rate\u003c\/td\u003e \u003ctd\u003e1,832 cc\/min @ 100 bar\u003c\/td\u003e \u003ctd\u003e2,214 cc\/min @ 100 bar\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaximum Recommended Operating Pressure\u003c\/td\u003e \u003ctd\u003e220 bar \/ 22 MPa \/ 3,190 psi\u003c\/td\u003e \u003ctd\u003e200 bar \/ 20 MPa \/ 2,900 psi\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSpray Pattern\u003c\/td\u003e \u003ctd\u003eOEM-equivalent spray pattern\u003c\/td\u003e \u003ctd\u003eUnique 8-hole OEM-compatible spray pattern\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCalibration Required\u003c\/td\u003e \u003ctd\u003eYes\u003c\/td\u003e \u003ctd\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cstrong\u003eChoosing the right injector stage depends on engine combination, fuel type, target horsepower, supporting fuel system components, and calibration strategy.\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWhat's Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eFour (4) Bank 1 Matched and Serialized Direct-Injection Fuel Injectors\u003c\/li\u003e \u003cli\u003eFour (4) Bank 2 Matched and Serialized Direct-Injection Fuel Injectors\u003c\/li\u003e \u003cli\u003eDetailed Installation Instructions\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eFitment \u0026amp; Applications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eCompatible Gen V GM LT Engine Platforms\u003c\/li\u003e \u003cli\u003eLT1, LT4, L83, L84, L86, and L87 Engine Applications (With 7.5 mm Injector Bores)\u003c\/li\u003e \u003cli\u003e2014-2019 Chevrolet C7 Corvette\u003c\/li\u003e \u003cli\u003e2014-2020 Chevrolet Silverado \/ GMC Sierra\u003c\/li\u003e \u003cli\u003e2014-2020 Chevrolet Tahoe \/ Suburban \/ Cadillac Escalade\u003c\/li\u003e \u003cli\u003e2016-2022 Chevrolet Camaro SS\u003c\/li\u003e \u003cli\u003e2017-2023 Chevrolet Camaro ZL1\u003c\/li\u003e \u003cli\u003e2016-2019 Cadillac CTS-V\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eNaturally Aspirated LT Engine Builds\u003c\/p\u003e \u003cp\u003eModerate Forced-Induction LT Engine Builds\u003c\/p\u003e \u003cp\u003ePerformance Street Vehicles\u003c\/p\u003e \u003cp\u003eTrack Day and Road Racing Applications\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eCRITICAL FITMENT NOTE!\u003c\/strong\u003e These injectors utilize a 7.5 mm injector stem design. They will NOT physically fit into newer Gen V cylinder heads equipped with 6 mm injector pockets.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e2021-2024 model years (Including 2023-2024 6th-Gen Camaro SS and 2021+ Silverado, Sierra, Tahoe, Suburban, and Escalade) MUST be physically verified prior to ordering to ensure they are not equipped with the 6 mm injector stem design.\u003c\/li\u003e \u003cli\u003eThese injectors are not compatible with LT2 applications (C8 Corvette), which exclusively utilize 6 mm injectors.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eFinal compatibility is dependent on engine configuration, cylinder head design, fuel system setup, power goals, and calibration strategy.\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eTuning Requirements\u003c\/h3\u003e \u003cp\u003eCustom ECU calibration is required. These injectors are fully controllable through the factory engine management system when properly calibrated. Supported tuning platforms include HP Tuners and EFI Live.\u003c\/p\u003e \u003cp\u003eInjector characterization data, calibration information, and tuning support resources are available to assist tuners during the calibration process.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eImportant Notes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eCustom ECU Calibration is Required for Proper Operation\u003c\/li\u003e \u003cli\u003eInjector Sizing Must Be Matched to Engine Airflow, Fuel Type, and Intended Power Level\u003c\/li\u003e \u003cli\u003eNot Intended for Use with Factory Fuel Calibration\u003c\/li\u003e \u003cli\u003eAdditional Fuel System Upgrades May Be Required Depending on Engine Output\u003c\/li\u003e \u003cli\u003eNot Intended for LT2 Applications Equipped with 6 mm Stem Injectors\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eInstallation Notes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eProfessional Installation by a Qualified Technician Is Strongly Recommended\u003c\/li\u003e \u003cli\u003eInstallation Applies to the Full Injector Set; Partial Replacement Is Not Recommended\u003c\/li\u003e \u003cli\u003eHigh-Pressure Fuel System Components Should Be Inspected Before Installation\u003c\/li\u003e \u003cli\u003eECU Recalibration Is Mandatory Following Injector Installation\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eWhy Choose Katech Fuel Injectors\u003c\/h3\u003e \u003cp\u003eFuel delivery plays a critical role in engine performance, durability, and calibration accuracy. Katech Fuel Injectors are engineered to provide consistent fuel delivery and predictable performance in demanding Gen V LT applications. Validated for high-pressure direct-injection environments, they are designed to support increased engine output while maintaining the control required for reliable operation.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWARNINGS\u003c\/h3\u003e \u003cp\u003eImproper installation or calibration of fuel system components can result in fuel leaks, fire, engine damage, serious injury, or death.\u003c\/p\u003e \u003cp\u003eThis product must be installed and serviced only by trained professionals experienced with high-pressure direct-injection fuel systems.\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"..\/files\/professional-installation.png\" alt=\"Professional Installation Recommended\" width=\"444\"\u003e\u003c\/p\u003e \u003chr\u003e \u003cp\u003e \u003cimg src=\"..\/files\/prop-65-warning.jpg\" alt=\"California Proposition 65 Warning\" width=\"175\"\u003e \u003c\/p\u003e","brand":"Katech","offers":[{"title":"Default Title","offer_id":47875143696540,"sku":"KAT-7983","price":2999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/M198644928.png?v=1792260893","url":"https:\/\/daroracing.com\/products\/katech-gen-v-lt-stage-ii-di-high-flow-fuel-injectors","provider":"Daro Racing","version":"1.0","type":"link"}