What are the recommended APR Stage 3+ engine internal upgrades?
With these upgrades, will the engine be more then adequate for long term life with the extra power?
Not sure on the cost of upgrading the rods and pistons would be. I've been running the Stage 3+ for a few months, so far so good, I'm loving it. M3's are one of my favorite cars, but they are not a problem now with the Stage 3+. : )




