Which Wood Cylinder Head Brand Wins?

This is a materials test rather than a commercial product/brand showdown: three types of wood (Walnut and IPE, both sent in by viewers, tested fresh in this video; Osage orange used as the prior video's baseline for comparison) are machined into small engine cylinder heads and run until failure. Two prior-video materials, JB Weld (an epoxy patch, held about a minute) and plywood (failed in a few seconds), are mentioned only as historical context and were not tested in this video, so they are excluded from products[] rather than treated as competitors. No prices are mentioned anywhere in this video (viewer-donated wood samples), so priceMentioned is null for all three entries. Chapters usefully fill two real gaps in the spoken narration: a walnut compression test result (62 PSI) that is never spoken aloud, and a note that IPE's first attempt lasted about 25 seconds according to an on-screen timer the chapter title itself flags as inaccurate. Chapters also reveal that three separate cylinder heads were tested for both walnut and IPE, but the transcript only narrates the outcome of the final walnut attempt and all three IPE attempts; earlier walnut attempts are likely shown on screen without corresponding narration. Winner reflects the video's own core question (longest duration before failure); IPE's superior fire/damage resistance despite a shorter recorded run is preserved as a distinct, non-competing observation in its own notes rather than treated as a second winner.