How to use: First, make sure you have the Inline - Pro J - to - F Adapter Plate as this mount kit requires it. Then, start the installation process. Note that you'll need to modify the J - Series engine oil filter section and there may be a need for some chassis modifications. You can choose the durometer bushings according to your preference: 75A (BLACK), 85A (GRAY), or 95A (DARK RED). Important things to note: These mounts are part of a custom engine swap system. There may be parts of the engine that need modification or relocation. It's strongly advised to have a mechanic or automotive specialist do the installation. Once the mounts are bolted down, they can't be returned or swapped. Maintenance advice: Check the mounts regularly for any signs of wear and tear. Although they come with a lifetime warranty, proper care can ensure their long - term performance. Also, be aware that due to the stiffer nature of these mounts, you may experience slight vibration depending on your engine series and HP.