... Bore:4.000" and 4.065". Rings:1.2mm 1.5mm 3.0mm)Flat Top,4.005''Bore, Rod lgth 6.125", Comp ... Ratio11.6:1, Comp.Ht. 1.115, -5cc Dome Vol, 4032 alloyFlat Top, ... 6.125", Comp Ratio11.0:1, Comp.Ht. 1.115, -5cc Dome Vol, 4032 alloyFlat Top,4.005''Bore, Rod lgth ... 6.125", Comp Ratio11.6:1, Comp.Ht. 1.315, -5cc Dome Vol, 4032 alloyFlat Top,4.060''Bore, Rod lgth ...