Did it monday, I think...took it out for a short ride. Hit 35mph....lovin' this NGK.
On Tuesday I took the second headgasket off that I had put on to help the stock 3point plug spark better. WOW!! Increased compression is amazing! The NGK really pepped it up with stock compression.
I had to lower it because the stock plug couldn't handle the pressure enough to spark right. Not so with the NGK.
Can you tell I love this plug?