Because of the changing nature of heads, intakes and piston designs, as well as a limited life span, not many aftermarket speed parts were made for the MEL line of engines. Edelbrock made a 6X2 intake manifold and a set of water-cooled marine exhaust manifolds (M4) and Weiand made a Drag Star 8X2 manifold as well. Oversize pistons for early drag racers or blown 430s were made, including sets by Jahns Pistons at 13:1 and over standard bore. Other speed parts have been rumored, but they are difficult to find.