The K&N 33-2731 is a washable, reusable panel air filter for the 1995-1998 Porsche 911 with the 3.6L H6 fuel-injected engine. K&N's layered, oiled cotton media is engineered to improve airflow and capture contaminants, and the manufacturer positions it as a replacement for the disposable OE paper element in the factory airbox. Search terms it targets include 993 3.6 drop-in air filter, reusable 911 993 panel filter, and K&N 96-98 911 airbox filter.
The case for buying it rests on lifetime use rather than a power claim. The manufacturer says a reusable K&N can save up to $125 versus buying multiple disposable filters over 200,000 miles of highway driving. It is backed by K&N's No-Hassle Lifetime Limited Warranty. Owners on user forums are divided on measurable gains. One dyno test cited there reported less power than stock on an older 911, so treat the horsepower claim cautiously. Buy it for reusability and filtration, not as a standalone performance upgrade.
The manufacturer lists this filter for the 1995-1998 Porsche 911 with the H6 3.6L fuel-injected engine. Model-level fitment details vary between sources, so confirm your body style and engine with the manufacturer before ordering.
Yes. According to the manufacturer, the package includes one air filter and one 1 oz K&N sealing grease.
The manufacturer states the filter is designed to provide an increase in horsepower. User forums are less convinced. One forum member noted there was no measurable gain on a 993 from a filter swap alone without a remap, so set expectations accordingly.
This is a drop-in swap: remove the factory paper element, clean the airbox, and install the K&N in its place. The manufacturer publishes an installation instruction sheet for this part number, so review it before you start. Owners on user forums say the 993 box can be fiddly. A common trick is to seat the element in the airbox lid first, then lower the lid while angling the filter so both rear locating pegs engage. Owners also warn that the rubber flap and raised surround around the element can keep the lid from clicking back into place, so check the seal before closing it up.
