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Patrick Kelliher · 08-17-2008, 05:22 PM

Yes, IHRA and NHRA factors are sometimes different. My combo is 241HP in IHRA and 249 HP in NHRA. If you are unsure call your division tech director.

08-17-2008, 05:22 PM	#6
Patrick Kelliher Member Join Date: May 2006 Location: New Hampshire Posts: 124 Likes: 0 Liked 0 Times in 0 Posts	Re: ihra classification guide Yes, IHRA and NHRA factors are sometimes different. My combo is 241HP in IHRA and 249 HP in NHRA. If you are unsure call your division tech director.