Scott,
You would want to purchase the 1-inch version of the installation kit to match the outlet size of that compressor. The model # for the 1-inch kit is 38335386. I have included a link below to that item. I would also consider purchasing the Ingersoll-Rand UP6 Rotary Air Compressor Start Up Kit (20-50HP). This kit contains 5 liters of the Ultra Plus coolant and a coolant filter for the UP6 compressor. The model number for that kit is 38462743. I have also included a link to that item below as well.
Ingersoll Rand 1" Standard Air Compressor Installation Kit
Ingersoll Rand UP6 Rotary Air Compressor Start Up Kit (20-50HP)