orlando1

I have a semi built gsr with rods,pistons etc. I have had this motor for about 3 1/2 years now and it has not had not one problem yet. My question is when it was built one of the cylinders was bored out a little to much ands the builder said it would be fine etc which it has been, what is the result of this over time and if i were to boost it what would i be looking at?