so far, i haven't done squat to my engine...

i was planning to get stillen intake w/ Z-tube, MD spacer, and HKS exhaust. i heard that getting a tune/re-flash at technosquare is one of the best bang-for-your-buck mods out there.

but with these three mods (intake, spacer, exhaust), would getting a tune/re-flash be worth it?

am i gonna experience significant change?

 

enough would all depend on you as speed is a personal preference

 

I would atleast add some HFC before a reflash/tune.

Not really. Its a matter of running too lean / too rich.

.

 

Get headers of HFC's before you reflash imo

 

will all brands of HFC pass smog tests?

regarding enough increase, let's just say i don't wanna go FI...

 

IMO unless you're going to install headers, HFC are not really going to do much. The stock exhaust manifolds are where most of the restriction is as they are only 1.5" dia ID at the connection to the cat. Most headers are 2.25" at the collector, or a 2.25X increase in flow area.

Your plan of Stillen, MD, and HKS is good though and the reflash will help. But not as much as with a 5AT sedan. It was a huge improvement on my car as the auto sedans have a very conservative OEM tune.