5 angle valve job?
Senior Member
Joined: Jun 2003
Posts: 4,703
Likes: 0
From: Eastern MA
They file down all valves in your engine on 5 different angles. They make it so air can pass through the valves with much less resistance. It costs a lot of money, so you shouldn't do it unless you have a beast. 3-Angles Valve jobs aren't even that neccessary.