Airbox Induction Filter Mod Mount for R53 MINI Cooper S (Gen 1)

thingiverse

THE SPROCKET MOD This part lets you fit an induction filter to your R53 Mini Cooper S without damaging anything and with zero external visibility. It's designed to push-fit firmly into your standard R53 airbox. No glue or bolts are needed. Once fitted, you can clamp a suitable 72mm induction filter like the K&N RU-3190 (shown) inside your air box instead of a regular paper panel filter. The advantage of an induction filter is greater airflow with similar filtration levels. This mod reduces the airflow area from 60mm to 54mm inside the box outlet, which equates to a massive 20% loss in cross-sectional area. Not ideal! However, this restriction should only create a high-pressure region rather than a true restriction because it's very short and curved. Overall, flow should improve. If you're looking for better flow still, I strongly recommend the R53OC Tim Woodford Mod over this one, or a custom airbox. But if you want to do the Hobo Mod on the cheap'n'easy, enjoy the make! ------------- UPDATE -------------- I've been using this for two months now in my car without any issues but... I've noticed that constant heating and cooling can cause the print to shrink slightly. I strongly recommend gluing or sealing it into place because of this. Secondly, the same shrinkage can cause the air-filter to fall off as it becomes loose. If you check it frequently over the first week and re-tighten, then this stops happening. Alternatively (untested), it might be worth printing this a few percent larger then pre-shrinking it in a warm oven. Shrinkage will undoubtedly vary by material.