Flavor non-universal vector leptoquark imprints in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mi>K</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>π</mml:mi><mml:mi>ν</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:math> and ΔF = 2 transitions

We analyze K→πνν¯ rates in a model with TeV-scale leptoquark addressing B-meson anomalies, based on the flavor non-universal 4321 gauge group featuring third-generation quark-lepton unification. show that, together tight bounds imposed by ΔF=2 amplitudes, present measurement of B(K+→π+νν¯) already provides non-trivial constraint parameter space. In minimal version model, deviations from Standard Model are predicted to be close correlation non-standard effects Lepton Flavor Universality ratios RD and RD⁎. With help future data, these correlations can provide decisive test model.