FiveO - 550cc Injectors (set of 4) high performance Japanese Electronics Corp (JECS) fuel injectors - Custom Milled to flow 550cc. Each set is sold with a complete flow-data chart indicating individual dymanic and static flow rates at 3, 3.5, and 4 BAR at 25%, 50% and 100% for each injector, along with dead time (latency) period at 14 volts.. To insure a quality product our shop adheres to the highest standard milling and flow-matching using the industry's latest technology.. You receive the highest quality fuel injectors for superstreet and racing applications. As part of our quality control, each injector has been marked/inscribbed by our technician with an individual control number and is part of a unique flow-matched set. This injector set is for modified engines with high horsepower. See Chart below. This injector will fit Nissan SR20DET, KA24DE Injector Body Design: Metal and composite plastic Flow rates: (These are true and tested flow rates of this fuel injector. We use Heptane as our testing agent). 550-560 cc/min at 43.5 psi (3 bar) 590-600 cc/min at 50 psi (3.5 bar) 640-650 cc/min at 58psi (4 bar) All sets are shipped with a flow-data information document. Flow rates will vary slightly from set-to-set. Excellent low pulse width with predictable response. Excellent atomization for modern single and multi-valve engines. This set will require no more than a 1% trim for easy tuning. SPECIAL NOTE: All orings are supplied for installation. These Injectors are used and approved by RS Enthalpy Tuning. Great Inexpensive alternative.