Depending on the rim diameter the recommended backspacing is 150-160mm (7" ET45

if you have any doubt that the BOV is not staying closed when it should be

or BAR and will flash when warning of over boost shutdown or rev limit

never exceeds the manufacturers tolerances - This will provide you rock solid oil supply pressure

Direct fit upgrade for the factory BOV on Honda Civic RS and Civic Si models with the 1

JR Wheels JR51 20x9 ET20-51 5H BLANK Satin Black w/ Machined Lip JR51 Depending on the rim diameterPCD: 5x108, 5x110, 5x112, 5x114. 3, 5x115, 5x118, 5x120 ET: 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51