Product Description Additional Notes LS COMBO DOME - compatable with LS1/2/6 style cathedral port heads & LS3 / L92 style rectangular port heads 404cid 4.010 x 1.110RCH, 4.000stroke,6.125rod,0.927pin,9.2cc,457g,13.7CR, 2618. MPN: 930229610 Proposition 65: Y