Sorry if this has been discussed but the search didn't glean what I wanted to know. I have a 997.1 turbo with only an EP1 as an upgrade. Been sitting on the fence for years on other mods. The IPD plenum caught my eye. Contacted the company. Seem nice. They claim 30 hp and tq gains with just the plenum. Anyone have a good experience? I've read some threads where they say they lost midrange power and then others (including IPD) say thats where you gain. Just curios if NOT doing an ECU tune would the IPD with the EP1 together net more power or would the ECU eventually adjust and I'd lose or not gain power? TIA

 

You will not feel any difference, 30HP more is a joke, I have one no change

 

Alone, it’s not worth it. But if you do a GIAC tune, the y-pipe and plenum are a must. And don’t forget the Champion intercoolers.