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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.

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.