Inliners International Forums General Discussion Engines Hardened Valve Seat Inserts and unleaded fuel . . .

Jason, it's not a matter of the combustion, but the catalytic reaction that takes place during the combustion... as I understand it.

And please don't think I understand it. As I've repeated over and over, I just know it stops the seats from disappearing... seats that show a willingness to go any time it's not there.