air cleaner legality question

Tom keedle · 05-06-2012, 06:25 PM

so, are open element air cleaners (aftermarket) legal in stock (nhra)?

Dion Hildebrandt · 05-06-2012, 09:16 PM

thats what I run and nobody has said that I couldnt.

Phillip marvetz · 05-06-2012, 11:42 PM

I was always told you had to have a stock (oem) base. I know one racer was told he could not run the K&N top filter also.

Bobby Zlatkin · 05-07-2012, 10:16 AM

That seems stupid when you're allowed to run without an air cleaner.

KRatcliff · 05-07-2012, 10:23 AM

You are right. That is silly. I have a single layer K&N filter that I run on my car and it slows it down a little. But it makes me smile when I am driving through the dusty pits in Div 4.

Phillip marvetz · 05-07-2012, 10:42 AM

One of the East coast racers on this forum has pics of his engine with a air cleaner base that clearly is not oem, It's a 2 barrel combo so it's pretty easy to spot. He seems to be allowed to use it so maybe the old rule is no longer being enforced?. I believe GTX John was harassed for having a reproduction Mopar unit on his Demon at one time though.

Harry 6674 · 05-07-2012, 01:19 PM

Nhra rules says if an air cleaner is used it must be OEM or have the OEM configuration. Sounds like you take your chances if it's not OEM. Pretty silly. You can run valve springs as stiff as your front springs but don't change that air cleaner.

Jim Wahl · 05-07-2012, 04:29 PM

Air Cleaners:
Optional. If used,air cleaner must be OEM automotive or retain OEM configuration. Air cleaner base may be cut or trimmed, but welding, bolting, riveting, epoxying or other form of fabrication is prohibited. Ram tubes, velocity stacks or non-stock-type base plates or ducting prohibited. Cooling holes prohibited in radiator side panels, etc. Factory air cleaners and/ or scoops that fit through hood must be affixed to carburetor as per OEM only.

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05-06-2012, 06:25 PM	#1
Tom keedle Senior Member Join Date: Dec 2008 Location: Berthoud, Coloraduh Posts: 695 Likes: 13 Liked 8 Times in 7 Posts	air cleaner legality question so, are open element air cleaners (aftermarket) legal in stock (nhra)? __________________ without losers,winning means nothing.

05-06-2012, 09:16 PM	#2
Dion Hildebrandt Member Join Date: Nov 2008 Location: calgary alberta canada Posts: 383 Likes: 0 Liked 0 Times in 0 Posts	Re: air cleaner legality question thats what I run and nobody has said that I couldnt. __________________ Dion Hildebrandt 6009 STK H/SA

05-06-2012, 11:42 PM	#3
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: air cleaner legality question I was always told you had to have a stock (oem) base. I know one racer was told he could not run the K&N top filter also. __________________ 2009 V/SA Record Holder

05-07-2012, 10:16 AM	#4
Bobby Zlatkin Member Join Date: Mar 2003 Location: Mills River, NC Posts: 417 Likes: 0 Liked 0 Times in 0 Posts	Re: air cleaner legality question That seems stupid when you're allowed to run without an air cleaner. __________________ Bobby & Norene Zlatkin L/SA

05-07-2012, 10:23 AM	#5
KRatcliff Senior Member Join Date: Sep 2011 Posts: 763 Likes: 75 Liked 524 Times in 141 Posts	Re: air cleaner legality question You are right. That is silly. I have a single layer K&N filter that I run on my car and it slows it down a little. But it makes me smile when I am driving through the dusty pits in Div 4.

05-07-2012, 10:42 AM	#6
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: air cleaner legality question One of the East coast racers on this forum has pics of his engine with a air cleaner base that clearly is not oem, It's a 2 barrel combo so it's pretty easy to spot. He seems to be allowed to use it so maybe the old rule is no longer being enforced?. I believe GTX John was harassed for having a reproduction Mopar unit on his Demon at one time though. __________________ 2009 V/SA Record Holder

05-07-2012, 01:19 PM	#7
Harry 6674 Senior Member Join Date: Dec 2006 Posts: 589 Likes: 0 Liked 0 Times in 0 Posts	Re: air cleaner legality question Nhra rules says if an air cleaner is used it must be OEM or have the OEM configuration. Sounds like you take your chances if it's not OEM. Pretty silly. You can run valve springs as stiff as your front springs but don't change that air cleaner.

05-07-2012, 04:29 PM	#8
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,843 Likes: 666 Liked 683 Times in 129 Posts	Re: air cleaner legality question Air Cleaners: Optional. If used,air cleaner must be OEM automotive or retain OEM configuration. Air cleaner base may be cut or trimmed, but welding, bolting, riveting, epoxying or other form of fabrication is prohibited. Ram tubes, velocity stacks or non-stock-type base plates or ducting prohibited. Cooling holes prohibited in radiator side panels, etc. Factory air cleaners and/ or scoops that fit through hood must be affixed to carburetor as per OEM only. . __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 D2 National Open Stock Champion 1981 D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association.