I'm not sure meth is 100% required, though I run it to be safe. When I was installing it, I kept having a check valve problem which made it not inject for the first few days. I eventually fixed it but my motor seemed to run fine for that short amount of time. My compression is the same in all cylinders so I'm not sure how long it would last without meth injection. I don't stay under high boost for long periods of time though. |