Reply to thread

I just got a set for my RH4 head. I'm pleased with the fit and used Permatex's "The Right Stuff" to set them in place. I did a small amount of blending at the tip just to ensure a smooth transition but it was very minor. At the same time, I set up the exhaust inserts. I'll be curious to see what all this does to the carburetor jetting. I suspect I'll have to lean out a bit but we'll see. I also have a set of the RH10 inserts on the way. If the fit is anything like the RH4's, there should be a noticeable increase in flow. Mind you, I'm not doing this for outright power but more to see how efficient combustion will be.