12497985 These die cast aluminum valve covers have a chrome finish. 

Center Bolt Design 141-132 Includes mounting hardware

They are used on all 1986 and newer Gen I and 2 engines with center hold down design.
They are approximately 1/4 inches taller than production covers.

Technical Notes: Use rocker cover gasket P/N 10046089 and replacement bolt and seal in kit P/N 12497980.
The kit includes two valve covers, eight bolts, washers, and seals.
They will also fit the GM 1.6 roller rockers, Crane Blue and Harland Sharp rockers.