... (standard Bore:4.000" and 4.065". Rings:1.2mm 1.5mm 3.0mm) LS (LS2 / LS3 / LS6 / L92 ) Professional Flap ... Top:(standard Bore:4.000" and 4.065". Rings:1.2mm 1.5mm ... Bore, Rod lgth 6.125", Comp Ratio11.6:1, Comp.Ht. 1.115, -5cc Dome Vol, 4032 alloyFlat Top, ... lgth 6.125", Comp Ratio11.2:1, Comp.Ht. 1.315, -5cc Dome Vol,4032 alloy LS (LS2 / LS3 / LS6 / L92 ...