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How to install a K&N filter?


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Hi.

I bought a K&N filter for my 07' boxster and I tried to install it yesterday, but just can't get the air box out of the engine bay like they did in the instructions that came with the filter. Can someone who did the install or knows about it, help me out? Any pictures will be appreciated.

Thanks for the info.

Alex

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He should be okay if he wraps the filter in newspaper overnight to absorb any excess oil. These filters (BMC and K&N) seem to come over oiled.

I have been running a BMC (oiled) filter for over 6 years with no problems.

Porsche also uses BMC filters on all their Cup cars and other race cars.

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Personally I think it could be costly if the oil carries over to the MAF. I'm sceptical of any real improvements from this type of mod unless it is coupled with an ECU remap. Potentially the air/fuel ratio can get too weak at the top end of the rev range at high speed. The filter has a lower resistance so the forced air percentage increases messing up the factory pre determined fuelling map. Perhaps the plastic baffle on the intake may help to reduce this ram air effect , so the only real improvement would be more intake noise and potentially a slightly quicker throttle resonse. If the resistance to air entering the engine is lower without an ECU remap to compensate , the engine could throw an air mass overange fault or worse still run hot. Typically most ECU's only have a 10% correction built in, to allow for fluctuations in air and fuelling. I've tried these K&N filters on two previous cars and found little benefit but many potential problems. Horses for courses , but in my opinion not a worthwhile performance improvement on its own.

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A filter without an ECU update has no significant result. The motronic has to be rewritten to allow for the extra air. Otherwise it is only noise that gives an illusion of speed.

As regards over oiling, I use a spray can to oil my BMC filter that controls the amount of oil more accurately than the more frequently used plastic container. Whatever the case let the oiled filter to dry up for a few hours before installing.

Also Porsche MAFs are generally not very durable. The technician at the OPC, keeps changing them even on cars with the stock filters.

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Why do you want to add this to your car? How will it effect your warranty? What are you going to do if the oil messes up your emmission sensors? Hope you don't get the dreaded CEL. Good luck.

Where I live there's lots of dust and debris in the air all the time, so I prefer to regularly clean the air filter rather than buy a new one every couple of months. I have no worries of damaging the MAS, i've used this type of filters in two of my previous cars and never had any trouble. I just take the time and patience so as not to over oil them. Anyway if the MAS were to fail I would just replace the K&N with the stock air filter. I'm looking for the extra intake sound without having to waste $350 on the Evolution Motorsports intake. Also, in all of the other cars I've intalled the air filters I've noticed a slightly better trottle response, don't know if it will happen in the boxster but it could.

I've talked to lots of porsche owners who run their daily and track cars with K&N filters and none have had any trouble with their MAS. Also the guys at my Porsche dealer are really cool and they don't bother with stupid stuff like this. I've read about MAS problems but most of them were on completely stock cars, so it probably is just a factory defect and people as always trying to scare others with "stories they've heard". So don't worry and I'll let you know if anything ever happens.

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Why do you want to add this to your car? How will it effect your warranty? What are you going to do if the oil messes up your emmission sensors? Hope you don't get the dreaded CEL. Good luck.

Where I live there's lots of dust and debris in the air all the time, so I prefer to regularly clean the air filter rather than buy a new one every couple of months. I have no worries of damaging the MAS, i've used this type of filters in two of my previous cars and never had any trouble. I just take the time and patience so as not to over oil them. Anyway if the MAS were to fail I would just replace the K&N with the stock air filter. I'm looking for the extra intake sound without having to waste $350 on the Evolution Motorsports intake. Also, in all of the other cars I've intalled the air filters I've noticed a slightly better trottle response, don't know if it will happen in the boxster but it could.

I've talked to lots of porsche owners who run their daily and track cars with K&N filters and none have had any trouble with their MAS. Also the guys at my Porsche dealer are really cool and they don't bother with stupid stuff like this. I've read about MAS problems but most of them were on completely stock cars, so it probably is just a factory defect and people as always trying to scare others with "stories they've heard". So don't worry and I'll let you know if anything ever happens.

You will need to shorten-up on your oil change interval too, since you will be letting more air and dirt into your engine.

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Why do you want to add this to your car? How will it effect your warranty? What are you going to do if the oil messes up your emmission sensors? Hope you don't get the dreaded CEL. Good luck.

Where I live there's lots of dust and debris in the air all the time, so I prefer to regularly clean the air filter rather than buy a new one every couple of months. I have no worries of damaging the MAS, i've used this type of filters in two of my previous cars and never had any trouble. I just take the time and patience so as not to over oil them. Anyway if the MAS were to fail I would just replace the K&N with the stock air filter. I'm looking for the extra intake sound without having to waste $350 on the Evolution Motorsports intake. Also, in all of the other cars I've intalled the air filters I've noticed a slightly better trottle response, don't know if it will happen in the boxster but it could.

I've talked to lots of porsche owners who run their daily and track cars with K&N filters and none have had any trouble with their MAS. Also the guys at my Porsche dealer are really cool and they don't bother with stupid stuff like this. I've read about MAS problems but most of them were on completely stock cars, so it probably is just a factory defect and people as always trying to scare others with "stories they've heard". So don't worry and I'll let you know if anything ever happens.

You will need to shorten-up on your oil change interval too, since you will be letting more air and dirt into your engine.

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I install a K&N fillter On my 987 boxster as soon it was available on the market. same reason; used on many past vehicles with no problems. So far no problems after a few months of hard driving. Better trottle response and sound; no decrease on gas millage found. Also the car has the intake restrictor plate removed.

As for your question; the best way to tackle the installation of the filter without removing the air box is:

1. Do the whole opening the engine procedure.

2. Move the driver seat foward and position yourself behind the seat; so you can reach the inside of the air box thru underneath the roll bars and work inside the Air box withing reach.

3 Place the filter inside the box; the same way you have the factory one out. (Remenber the tilting procedure).

4. the easier way to do the alingment of the filter on the oval mounting surfice; is to compleately loose the metal holding clamp. Leave the metal clamp hanging, but push it in place at the same time as you push the filter in place. (Make sure you hold the filter only by the 2 rubber tabs at the neck of it while pushing in). It should slide right in with some toggle.

5. Re-install the phillips screw to keep it level and in place.

6. To tigh the metal clamp; I foud the easy way is to hold the bottom (treaded portion) with a pair of neddle nose pliers ,alined pushing in at the same time from the top with one of those socked end type screw drivers to get it started. (I dont remenber the size from top of my mind; sorry)

7. screw the metal clamp and you are done.

Not really a hard task; Just a little complicated due to space.

Hope you enjoy your new filter; soon. :thumbup:

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I install a K&N fillter On my 987 boxster as soon it was available on the market. same reason; used on many past vehicles with no problems. So far no problems after a few months of hard driving. Better trottle response and sound; no decrease on gas millage found. Also the car has the intake restrictor plate removed.

As for your question; the best way to tackle the installation of the filter without removing the air box is:

1. Do the whole opening the engine procedure.

2. Move the driver seat foward and position yourself behind the seat; so you can reach the inside of the air box thru underneath the roll bars and work inside the Air box withing reach.

3 Place the filter inside the box; the same way you have the factory one out. (Remenber the tilting procedure).

4. the easier way to do the alingment of the filter on the oval mounting surfice; is to compleately loose the metal holding clamp. Leave the metal clamp hanging, but push it in place at the same time as you push the filter in place. (Make sure you hold the filter only by the 2 rubber tabs at the neck of it while pushing in). It should slide right in with some toggle.

5. Re-install the phillips screw to keep it level and in place.

6. To tigh the metal clamp; I foud the easy way is to hold the bottom (treaded portion) with a pair of neddle nose pliers ,alined pushing in at the same time from the top with one of those socked end type screw drivers to get it started. (I dont remenber the size from top of my mind; sorry)

7. screw the metal clamp and you are done.

Not really a hard task; Just a little complicated due to space.

Hope you enjoy your new filter; soon. :thumbup:

Thanks for the info. As soon as I get a break I"ll try it again and let you know!

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