can u tell me is the exhaust system {from) intake and exhaust manifolds 2 muffler ? (92 s10 blazer 4.3 vortec ) and can it changed 2 dual exhaust and what kind of PERFORMANCE difference could i see if any?

 

For enough money (custom at an exhaust shop) you can get whatever exhaust you want. A dual exhaust would probably hang down pretty far. I don't think there is enough room under a blazer to get duals tucked up nice.

As far as performance, a dyno might show 10 h.p. at an unusable, high rpm level. Your butt probably won't be able to tell.

Now, if you have a hotter cam, headers, an aggressive pcm tune, things of that nature, an exhaust upgrade becomes more beneficial, because you have done things to actually improve airflow through the engine.

 

if anything if you have a mostly stock engine and you put true duals it will do more harm than good

 

Just run a slightly larger single pipe to a single muffler with two exits, if the look is what you want.