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

Good to see this topic still going. The more I read about it the more I get confused.lol
The heat transfer problem with inserts is interesting.

So does an 8-12 hour drive on the hiway with a "cat" mean I should have seats put in?
What about towing a 1500# trailer through the mountains?