I think I'm sending this message to the right person. I just got my angled shread stack from ddm today for a stock filter and the plenum piece that comes out in the front doesn't fit in side my stock filter piece. Is this common is there something that I need to mod to make it fit. Any help you can give would be greatly appreciated. Thank you in advance and if I sent this to the wrong person could you please let me know who to send it to if you know them.