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Tom chose Milodon parts to control oil on the bottom end, including a PN 32250 diamond-screen windage tray and crank scraper. Air filters (14x3-inch round elements), headers, and mufflers will be required on the dyno for the Challenge pulls. Nelson has chosen a K&N filter element (and oil filter), and he's close to choosing Hooker Headers. Tom is still looking over muffler choices for a good "straight-through" design. While we weren't able to describe every tiny element of this particular entry, we hope you've gotten a good idea what to expect from the Engine Masters Challenge. The design and parts choices for this engine may be very similar or radically different from other entrants, and future Engine Masters Challenge buildups we're following will reveal some of the competition.