[Cunningr]

Changing the plenum alone probably would net 0 gain, the real increase in power is from the larger throttle body. Was on the fabspeed site the advertised claim for a 986 is 30 to 35 hp, depending on mods. Personally I dont think there is that much to be gained, but they have dyno tables. Also is $1200 if you get the whole set up. Fact of the matter getting much more hp from the 986 is pricey per hp.

My plan is multifaceted, exhaust, plenum tb, software tune, sport cats, software tune adjusted. I think that will get about as much usable hp from bolt ons available, with the exception of better headers. Is it worth the cash, depends on the individual.