1x Sytec Power Boost Valve Kit (Purple) (VK-SBV-WRX-P) Fuel > Fuel Regulators > Fuel Injection Pres Regulators 1x Sytec Power Boost Valve Kit (Purple) (VK-SBV-WRX-P) Your browser does not support the video tag. 1x Sytec Power Boost Valve Kit (Purple) (VK-SBV-WRX-P) VK-SBV-WRX-P Sytec Fuel Injection Pressure Regulators SYTEC BOOST VALVE KIT (Purple) + MRB001 Designed for use on ‘Electric Fuel Injection’ Engines with a special fuel enrichment facility for acceleration, commonly known as a ’Rising Fuel Rate’. The enrichment rate is 1.7 : 1.Benefits are the same as above.Unit comes supplied with a standard mounting bracket. Green Spark Plug Co. Ltd has now added a dedicated sales and distribution team to handle customers questions and pre-sales enquires, we are experts in our field so if.