Background info: I have a 2000 integra ls with catback exhaust, cold air intake, 4-2-1 header, and soon to be installed throttle body, intake manifold. I PLAN on turbo set up end of summer

should I get a p28 ecu for the 5 mods listed above not counting the turbo?

or should I not get a p28 and only get a s200 for when I get the turbo set up?

can I have both a p28 ecu and s200? i dont understand how this works

definitely dont need that stuff for your mods listed...and yes, you have both, but beware, firstly, the s200 was discontinued this past january. Second, the s100 and s200 both need to have an additional boost feature added, at which point, its best to go for teh s300. Check out ectune.com..it might work but i dont know what your goals are. ectune is like hondata on a budget (as sov put it)

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Forty4U2BNVS: I've been known to toot a pipe or two

oops yea i meant s300 for when i get the turbo done