Thinking of trying a mbc for the first time but which is better the 'pro' or the 'pro' rx version? Car is on stock turbo running 25psi what is the taper of boost like with a mbc will it still hold a decent amount of boost up top?

 

I know that many people run the pro with good results

 

The only thing a Pro RX is better for is low boost applications. The pro is what we sell and run in every car we build.

-Em

 

So does the 'pro' come with 2 springs like the rx or just the one and is it the correct spring to run the boost I'm after?

 

It comes with the correct spring you are after.

 

honestly you're going to get the taper you're experiencing with that small of turbo regaurdless of what mbc you run but Emery is correct. you need the stiffest spring available.