Hi, I'm about to install a BMC air filter replacement instead of the factory paper replacement. Anyone has had any issues with this filter in a 997 S?

Any advantages?

Thanks

 

I'm happy with mine. No issues at all. The factory airbox is very efficient, and the BMC only allows it to breathe better.

 

+1. It also makes the engine rev a bit more freely from 4k+. It's just smoother and less "choked".

 

Are the BMC filters oiled? Is there a risk with the Mass Airflow Sensor and the Check Engine Light going on?? Also how does just changing out the filter effect the sound?


Jon

 

The BMC filter is oiled. Before replacing my paper filter, I wrapped the BMC in newspaper the night before to absorb any excess oil that may have come from the factory. There wasn't any. I know that it may be an overcall on my part, but "better safe than sorry". With that said, I have had no problem since the replacement ~ 200+ miles. In my experience, there's no change in sound as far as I can tell.

 

I have fitted the BMC "cup filter" to my 997 GT3 and can feel the difference esp from about 5,000 on up.
As for problems, we'll see.......

 

So what is the advantage of using the BMC filter then? There is a risk with the oiled filter then to set off the CEL. Is it really worth it? Also the risk of long term engine damage as the filers allow more air but also allow more dirt into the engine. Is this true?

 

Well, if you're looking for a night and day performance, the filter is not it; however, it does make the upper rev range smoother and less "choked" and more fun to stay in .
That, for me, is the advantage of this filter.
As with any aftermarket performing products, there's always a compromise. Only you can determine the risks you're willing to take for the price you're paying. With that said, in my experience, I've yet to come across an engine that is damaged from a properly maintained higher flowing filter. I guess the question is, how many miles do you need to see the damage? I suspect there may be more sludge in the engine from the freer flowing filter; however, with regular oil/filter change, I think that can be minimize to some extent. I'm sure other more experienced and knowledgeable members can give further insight to this question.

 

Just don't over oil the filter and you will be fine. I used a BMC filter on my C2S for 2 years with out any issues.

 

I'm glad to hear there are no issues since I have 2 of the BMC filters on order for my X51 airbox. I guess that means that I have 2X the probability of fouling my MAF

 

I got 900 miles on my BMC Filter. I put the Fabspeed CAI in as well at the time. And I can attest the difference between my car b4 the CAI and Filter is NIGHT & DAY. The car breathes way better and no problem w the CEL or anything. Def a great filter no doubt.

 

Please keep us posted with performance over the long run. Thanks

 

Can someone explain why some people have had problems with K&N air filters and other have had no problems with BMC air filter?

Excuse my ignorance, but K&N and BMC air filters seem to be very similar.

One filter has more oil than the other one????

Thank you all for your feedback.

 

I was wondering the same. Just purchased a 2006 C2S and looking to replace the airfilter but have heard some like the BMC filters and some like the K&N. What is the better air filter for the C2S

 

I just installed two BMC air filters into my X51 airbox and now I have a slight noticeable hesitation on hard acceleration. I am going to go back to the paper filter to see if the BMC filters are the problem.