Overview Reviews Product Description Cylinder Head Gasket - 4.320 in Bore - 0.030 in Compression Thickness - Multi-Layer Steel - Big Block Chevy - Each Product Videos Custom Field Product Reviews Write a Review Write a Review × Cometic Gaskets Cometic Gaskets 4.320 MLS Head Gasket .030 - BBC C5816-030 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *