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How to Install a Cone Filter in a '95 993

Pelican Technical Article:

How to Install a Cone Filter in a '95 993


1-2 hours






10mm socket, ratchet, Philips head and flathead screwdrivers.

Applicable Models:

Porsche 993 Carrera (1995)
Porsche 993 Carrera 4 (1995)

Parts Required:

Air filter

Performance Gain:

Improved engine air intake and performance.

Complementary Modification:

Add a higher flow exhaust system to compliment the increase air intake performance.

How to Install a Cone Filter in a '95 993

The procedure to install a cone filter on a 96+ 993 is slightly different from a 95 993.  If you have a 96+ 993, there is the extra temperature sensor on the intake to deal with and also the way the air box is mounted to the intake is different.  And once you removed the air box on a 96+ 993 it is almost impossible to put it back.  If anyone know the trick to get it back in please let me know.

(1). Pull off the snorkel that goes to the air box.

(2). Remove the 10 mm bolt that hold the air box to the engine.  Grab the air box and lift it up from the front of the air box and slide it to the right (passenger) side to reveal a rubber ventilation hose that is hooked to the left inside of the air box.  Loosen the clamp and pull the hose away from the air box.

(3).  Reach in to gain access to the two strap that strap the air box to the throttle body, and unstrap them.  The air box can now be removed.


(4).  This step is optional.  The factory intake have these square cube mesh screen on both sides of the intake.  Most people have them removed to allow more air flow to the engine. (Not sure if it will make any difference) Pop the metal ring inside of it to get the square mesh out.

(5). In order for the cone filter to fit nice and snug I removed the rubber intake tube on the intake to gain a better access in mounting the cone filter.  To remove the rubber intake hose you will need to loosen the metal strap and the wiring harness.

(6). The small filter that comes with the kit also needs to be installed on the breather tube that is now exposed after it is disconnected from the factory air box.  To mount the small filter on the breather tube I had to disconnect the breath tube at the starting point and mount the small filter on it while the tube is off the car in order to have a tight fit.

(7). Install the supplied snorkel tube into the factory snorkel and mount the other end to the cone filter.

This cone filter kit was purchased from MSDS for around $150, the cone filter sound on a 95 993 without the varioram is very different than from a 96 993 with the varioram.  For one thing you can clearly hear the growling sound of the intake even if the RPM gets to about 5000 RPM, but on the 96 993 with the cone filter once the varioram opens up all you hear is a droning sound that drones out the growl of the cone filter.

Comments and Suggestions:
rbp Comments: Does anyone know about the air pipe going to the trans, is it necessary? The cone filter I got had no provision for that pipe so I left it disconnected. Is it a big deal?
March 30, 2014
  Followup from the Pelican Staff: I believe it is a vent. I would be sure it is not open, allowing debris to enter. - Nick at Pelican Parts  
David Comments: Did you ever figure out how to put the airbox back in the car. It's not staying in. Will this effect me driving or is it bad for the car for it to be loose? Thanks
May 29, 2013
  Followup from the Pelican Staff: I install the airbox without the air filter or lid. Then once I have it attached the intake air duct, I install the filter, lid and bolt it down. - Nick at Pelican Parts  
Ray Comments: on the 993 with varioram. what happens to the temp sensor that was once mounted into the airbox ?
July 31, 2009
  Followup from the Pelican Staff: I'm not 100% sure, but that sensor is used to measure the temp of the ambient air coming into the airbox. So, theoretically, it could be placed or affixed right next to the cone filter. - Wayne at Pelican Parts  

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Page last updated: Mon 1/22/2018 02:23:36 AM