This oil cap is a direct replacement for any gasoline powerd volvo made from the late 60s up until 2006~2007 We started making these due to requests from customers who did not have a need for extra crank case ventilation but still wanted something a bit nicer than 35 year old plastic (our vented oil caps can be found in our catch can plumbing section.) Thes are machined from billet aluminum and anodized black. They use standard volvo rubber seals so they will be servicable for a good long time.
