The 987 S already uses a high capacity air filter, de snorkelling or fitting an oil type single layer filter may improve the sound but wornt give any real Hp gain. Remaps will give quoted figures of between 10 and 20 hp gain and similar values for torque. De snokelling or removing the baffle plate on the intake increases the risk of water droplets getting into the air filter and blocking it when driving in rain, so not an ideal mod for the UK. Many of the Hp claims by tuners are often unsubstantiated , so ideally get a rolling road or dyno figure before and after and a guarantee of money back if you dont get the claimed results. The carnewal exhaust mod will give better sound , but its not claimed to give any performance gains , even though it removes the rear catalysts. The 3.2 S uses a performance manifold already so the only upgrade to the exhaust IMHO is to get the primary cats in the manifolds replaced with hi flow performance ones. If you are looking for a bolt on upgrade to a 987 3.2 S the fitting of the cayman throttle body and intake distributor tube will give a 7-10 hp gain from 4500 -6000 rpm with 10 ft lbs of torque over a similar range. The mpg is marginally improved and throttle response sharpened , with no requirement to remap the ECU.
]
