Custom 3d printed quad blower twin mill engines. Both are linked together so they easily drop in to your Twin Mill. These are made for the older Twin Mill redlines but may also work for newer versions with a bit of modification to your interior. Gives your Twin Mill a new beefier look. As usual will come with bonus stuff depending on what I have in stock. I print these as soon as the order comes in and ship same day or next day if orders are placed after 8 pm.