Woodburn Dragstrip
7730 Hwy. 219
Woodburn, Oregon

Tuesday Tech Question 8/7/2018

Question:  I’m planning on my Pro ET car to run low 10’s in the 1/4-mile and I will now need an SFI 4.1 trans. shield. I bought a one year old used SFI 4.1 shield and my racing buddies said it was not legal without lower pan straps. What do I need to make it legal?


Answer:  In the 2018 NHRA Rulebook, General Regulation section 21, page 16, 2:14 Transmission, Automatic 2nd paragraph it reads “All non-blanket-type shields must incorporate two (or one, per manufacture’s instructions) ¾ X 1/8-inch straps that bolt to the shield on each side and pass under the transmission pan, or transmission pan must be labeled as meeting SFI Spec 4.1.”

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