Valve covers: Application: Fits sb chevy engines 283 327 350 383 400 with center bolt heads '86-up heads. Description: Brand new pair of small block chevy black coated valve covers. Short style Looks great on hot rods, muscle cars, camaro, nova, chevelle, 55-57, pickup truck, corvette, etc. These are the best quality valve covers we have seen in this style! Valve covers come complete with baffles, studs & bolts as pictured Included are the valve cover studs and nuts Included are 2 grommets for breathers Very heavy aluminum (not light like others out there) Excellent quality gasket rail - will seal nicely. Note: Package without valve covers gasket! Air Cleaner: 12" Oval Finned Black Aluminum Air Cleaner Inner diameter 4-15/16'' ,outer diameter 5-1/8" It is oval in shape and measures approximately 12" long, 8 1/4" wide, and 3" tall. these will clear hei distributors. 5 1/8" opening to fit most carburetors including edelbrock, holley, rochester, barry grant demon, etc. Fits Chevy, Ford, or Mopar (Chryler, Dodge, Plymouth). A perfect match to finned aluminum valve covers (Chevy, Ford, or Mopar). Stud can be cut to fit your particular application. If item's diameter is too small to fit carb base, some grinding work might be involved.