I see that hiboost have forged internal's for the mazda3 cool..... but the thought of removing the engine scares the crap out of me I've heard you can do this swap with engine in chassis is this true?by removing timing cover,head and oil pan can this be done?

 

yes but it's a ROYAL pain in the ***....

I'd just stick with stock internals until you want to get CRAZY with boost...I think Juan made like 274whp on stock internals and they handled it no problem

 

wow, i've never heard of anyone doing a piston swap on anything without pulling the motor! that would SUCK! How would you get the bearings out?

 

Yeah your right probably sticking to stock internal's for a while but I've read a thread on the mazda3 forum's where Juan wrote that it can be done with engine in chassis? but anyway's stock internal's for know.