CLASS RACER FORUM - View Single Post - Valve guide & spring seats on Stock heads.

ss3011 · 01-05-2015, 07:31 PM

That's a good question ! I thought you were not allowed to make the spring seat larger, but they have allowed you to modify the guide to install valve stem seals. I think you could make a case that any guide modification was to allow for those seals to be installed.

01-05-2015, 07:31 PM	#2
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Valve guide & spring seats on Stock heads. That's a good question ! I thought you were not allowed to make the spring seat larger, but they have allowed you to modify the guide to install valve stem seals. I think you could make a case that any guide modification was to allow for those seals to be installed.