does anyone know if it is possible (with a very small amount of work) to put 420A pistons into the 4G94 engine? i am wondering because the only pistons i have found are from RRM at the stock compression ratio. if anyone has better sources, please list these also.

 

I know for a fact that you can, but im not sure of the work. Im guessing you will have to take off your head covers and then someone pull out your cams and then rods and take the wrist pins out of the pistons, but im not an expert im just giving you an idea.

 

it is my understanding that the heads are extremely close so a swap may not be possible. ask boeturbolancer I am sure he has an answer

 

Are you looking for higher or lower CR pistons? RPW can have them made as I understand it, but they're a custom job. Chances of pistons from another engine fitting the 4g94...slim to none.