# Sonex B upper fire wall flange

**URL:** <https://sonexpilots.org/t/sonex-b-upper-fire-wall-flange/5330>\
**Category:** Sonex-B\
**Created:** [January 9, 2026, 9:56pm UTC](https://sonexpilots.org/t/sonex-b-upper-fire-wall-flange/5330 "2026-01-09T21:56:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CaptT](https://sonexpilots.org/letter_avatar_proxy/v4/letter/c/fbc32d/32.png) [@CaptT](https://sonexpilots.org/u/CaptT)\
**Post date:** [January 9, 2026, 9:56pm UTC](https://sonexpilots.org/t/sonex-b-upper-fire-wall-flange/5330/1 "2026-01-09T21:56:54Z")

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Can someone please tell me if the flange on the upper firewall points toward the engine or the cockpit when attached? I see to see it drawn both ways with no definitive comments as to which is which.

Many thanx . . . you guys rock!

Capt. T

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**Author:** ![williamabatten](https://sonexpilots.org/user_avatar/sonexpilots.org/williamabatten/32/1345_2.png) [@williamabatten](https://sonexpilots.org/u/williamabatten)\
**Post date:** [January 10, 2026, 3:27am UTC](https://sonexpilots.org/t/sonex-b-upper-fire-wall-flange/5330/2 "2026-01-10T03:27:55Z")

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CaptT,

The flange on the upper firewall points toward the cockpit. I purchased the fastbuild kit, so the factory made this part, just like drawing WXB-F11.

Hope this helps.

Bill

N67WX - 25 hours in Phase 1 Testing