[berty987]

Not sure the 986 or 987 3.2 or 2.7 will benefit from the 82mm tb of the 997 carrera 3.8/gt3 . There was a guy that tried it over in australia and he thought it actually lost power. Fitting the 74mm unit with a silicone intake and cone filter is probably the best solution for a 986 , as removing the air box is much easier than on a 987. The 986 definitely has a stunted performance from the smaller air box and media area , hence the 986 550 anniversary gained power from simply fitting the 987airbox and filter but keeping the 68mm tb. The later 987. 3.2 and early 2.7 987 both used the 68mm tb from the 986. The later 987 M97 engine 3.4 and 2.7 used the larger 74mm throttle body. There is a thread running on planet-9.com relating to a cold air silicone hose and cone filter upgrade for the cayman that suggests significant gain over the 987 air box. This may be worth considering as an alternative to the hassle of buying and fitting the 987 air box to a 986. There may be issues with the maf housing diameter as the 987 uses a larger size and a different type of sensor I believe.