Does upgrading the valve springs and pushrods is needed once I get 1.9:1 ratio rockers for my VX V6 Commodore ? Jason August 10, 2023 11:15 Updated No. However for piece of mind if your engine has done over 250,000kms then you would want to consider replacing your valve springs. Comments 0 comments Please sign in to leave a comment.
Comments
0 comments
Please sign in to leave a comment.