Hi,These REAL STEEL OLD STYLE ORIGINAL As Produced By; Vehicle Manufacturers In 1960s an 1970s.These P/no SS107 Dufor PCV Valves are Mint NOS Items.That Have Being In Stock Here For 35 Years at Least.Here in Is All The Details Needed For You An Your Vehicles CHRYSLER/DODGE/MOPAR P/NO 2658381 Are Correct As Per My Old Dufor Reference Book.I am Not A Expert of Everything.No One Is!Only The Best Will Do For Your Vehicles.