[Xtra Octane]

I posted a request for info on pre-filters a few months ago. Did not get much help. So I pursued this through a company called "Outerwears". They made me one, works great. Doesn't restrict any air and keeps those pesky little bugs out of the air cleaner pleats. Now I am not concerned about removing the huge cone over and over to clean it. It'sd not an easy task. If you are unaware, the Redeye has 3 air inlets into that air box. So debris and bugs come from everywhere. This prefilter is awesome!! So glad this company makes it.
The filter in these cars is made by K&N and sold to Dodge. They do not make a pre-filter for there own filters. Amazing!!

 

[ScLeCo]

"Doesn't restrict any air"

Negative.
They absolutely do.
Did a back to back run on a dyno and gained 11hp without the prefilter.

 

[hellcatbruh]

How exactly would one of these NOT be slightly more restrictive?

 

[18WIDECAT]

so Op, how long have you worked for Outerwears?

BTW - go run around the block with a pillow case over your mouth and then come back and tell us how it doesnt restrict your airflow...

SMH, some people I swear!

 

[Turd McGavin]

so Op, how long have you worked for Outerwears?

BTW - go run around the block with a pillow case over your mouth and then come back and tell us how it doesnt restrict your airflow...

SMH, some people I swear!

i was going to say the same thing…doesn’t restrict air my b-hole

 

[Xylander]

They do slightly restrict air flow. However, dirty filters also restrict air flow.

I live in NW Florida where we get clouds of yellow pollen 2x a year. When that stuff gets moist, it can form into a semi-concrete like consistency and I've seen it seriously clog air filters. Florida, you know, where it's 100% humidity a LOT, everything gets wet and stays wet. I ran a prefilter on my HC solely to combat the pollen and bugs.

Now, what I'd like to see is a test on a prefilter vs. a test on a car with a filter at 5,000 or 10,000 miles of use. I'd be willing to bet that the prefilter equipped car is going to flow better. All the tests I've seen compare prefilters to stock new air filters, fresh out of a clean box. If you drive it for 500 miles, that filter is already starting to restrict airflow. The car with the prefilter is not going to get a dirty air filter... at least not with the JLT filter I had. I put 17,000 miles on it and went through 3 prefilters, and the air filter never got so much as a speck of dust on it.

 

[Xylander]

so Op, how long have you worked for Outerwears?

BTW - go run around the block with a pillow case over your mouth and then come back and tell us how it doesnt restrict your airflow...

SMH, some people I swear!

Well, keep in mind that it's widely known that the Hellcat/Redeye air box+filter flows more CFM than the car can use. Does a prefilter drop it beneath the usable level? I don't know the answer to that question, but I ran a JLT CAI + prefilter on my 2020 NB Hellcat and it pulled a 10.98 1/4mi at sea level (Gainesville) and was able to pull 3.7 0-60s on all season tires on the street. So, it wasn't hurting anything in my case.

 

[SickToo]

Who gives a shit?

Run as restrictive of a filter as you want during the week

How is that gonna slow you down at the drag strip when the car is on the track and the filter is in the trailer?

Pre filters are for racing Baja. Put one on a class one truck we built cuz you gotta. It’s a staggered start so owner had to chase and pass a lot of vehicles. The dust is insane. I would never put one on anything else tho

 

[Turd McGavin]

They do slightly restrict air flow. However, dirty filters also restrict air flow.

I live in NW Florida where we get clouds of yellow pollen 2x a year. When that stuff gets moist, it can form into a semi-concrete like consistency and I've seen it seriously clog air filters. Florida, you know, where it's 100% humidity a LOT, everything gets wet and stays wet. I ran a prefilter on my HC solely to combat the pollen and bugs.

Now, what I'd like to see is a test on a prefilter vs. a test on a car with a filter at 5,000 or 10,000 miles of use. I'd be willing to bet that the prefilter equipped car is going to flow better. All the tests I've seen compare prefilters to stock new air filters, fresh out of a clean box. If you drive it for 500 miles, that filter is already starting to restrict airflow. The car with the prefilter is not going to get a dirty air filter... at least not with the JLT filter I had. I put 17,000 miles on it and went through 3 prefilters, and the air filter never got so much as a speck of dust on it.

so what you are trying to say is that I can ditch my filter and only use a prefilter? After-all you said your filter was good as new...not even a speck of dust

 

[baabootoo]

Engine Masters said otherwise, and you can watch for yourself. HOWEVER, it was only on a 550HP/500TQ 6.2. Either way, I use them all the time, even winter, unless I'm at a track in nice weather.

Lastly, it looks like K&N DOES make them; at least according to Amazon..........

FUNEWGYS............

"Engine Masters" Cold Air Considerations (TV Episode …

"Engine Masters" Cold Air Considerations (TV Episode 2021) - IMDb

Cold Air Considerations: Directed by Christopher Read. With Steve Brulé, Steve Dulcich, David Freiburger. We've done air filter shootouts before, but none like this. This time on Engine Masters, it's all about finding the least restrictive way to route a cold air system. Most modern EFI setups...

www.imdb.com

Oct 29, 2021 · Cold Air Considerations: Directed by Christopher

 

[Reaperhwk]

To each his own. I would rather just not use the net and clean the filter when it’s dirty? Is this really so it looks pretty? I have a open element like that on my other car and where I live there is no issue with the filter getting clogged with crap. Maybe if you lived in the woods and only drove at night?

 

[Xylander]

so what you are trying to say is that I can ditch my filter and only use a prefilter? After-all you said your filter was good as new...not even a speck of dust

Sure, I mean, that's kinda what turbo screens are for in race applications. Depending on the mileage, the socks I used only lasted 3-6 months. They have a coating on them that makes them near waterproof. Once that wears off, they start collecting moisture and get clogged up.

 

[Xtra Octane]

Engine Masters said otherwise, and you can watch for yourself. HOWEVER, it was only on a 550HP/500TQ 6.2. Either way, I use them all the time, even winter, unless I'm at a track in nice weather.

Lastly, it looks like K&N DOES make them; at least according to Amazon..........

FUNEWGYS............

"Engine Masters" Cold Air Considerations (TV Episode …

"Engine Masters" Cold Air Considerations (TV Episode 2021) - IMDb

Cold Air Considerations: Directed by Christopher Read. With Steve Brulé, Steve Dulcich, David Freiburger. We've done air filter shootouts before, but none like this. This time on Engine Masters, it's all about finding the least restrictive way to route a cold air system. Most modern EFI setups...

www.imdb.com

Oct 29, 2021 · Cold Air Considerations: Directed by Christopher

View attachment 595805

I called K&N a couple of months ago and they would not give me any info as the main filter is produced for Dodge. No part # for a pre-filter. If you have one for me to look up on Amazon, I'd appreciate it.

 

[baabootoo]

They make many sizes so just measure what you have and get one that fits.

 

[snobrdrdan]

Wow....I guess no one likes the "convenience" of the pre-filter, as it keeps the filter cleaner for longer. And it doesn't hurt that most are water repellent too

But pulling pollen or bugs or dandelion seeds/cotton/whatever out of a dirty or wet filter (when you clean it) kind of sucks....if you want it perfectly clean/pristine again, anyways

 

[Turd McGavin]

I just buy a new filter and I'm done with it...I'm not cleaning anything

 

[Xylander]

I just buy a new filter and I'm done with it...I'm not cleaning anything

Well, that's kinda silly in that the stock filters are reusable oiled filters.

 

[SickToo]

My car came stock w a DRY washable filter

Don’t the hc’s come with the same sort of material for their flat filter stock airbox?

 

[Turd McGavin]

Well, that's kinda silly in that the stock filters are reusable oiled filters.

Laughable..."reusable air filter." I swear some people just wont get off their wallet for some good ole' preventive maintained

 

[GBLWRMR]

K&N does make one. I had it on my 18' when I ran a Demon airbox and filter. Unfortunately, I don't have a model number.

HERE