3 Bar Map Sensor

I have the SS17 turbo from Kerma, 2.5" exhaust from the CAT back, and after replacing the clutch I will be installing the PP520's and tuning to RC3.

Is it worth upgrading to a 3 Bar Map sensor? If so, what are the pros and cons (if any)?

3 bar map sensor

I have a 3 bar map in my eurojet upgrade intercooler and I was told from Kerma that it will help control the increased boost from the bigger turbo.

It allows you to use boost above 22psi. RC3 is less than that so it won't do you any good.

Go to the RC3+ or RC4 and the 3 bar will help a lot. Ride in a car with the 3+ or 4 and you will end up there.
Richard55