The seats are trapezoidal and cast into the head, a very skilled machinist with a proper serdi can machine out the old seats parallel without removing alloy (leaving the circumfrence of the old seat in place), and press in new seats. I had this done on my T140 head, seats are better than new
The Access Norton Website uses cookies to keep you logged in if you register.
By continuing to use www.accessnorton.com, you are consenting to our use of cookies.