Ultra high-quality replacment vacuum line set made in Japan. These hoses are color coded just like the originals, but feature heat resitant plastic lines and very high quality rubber ends that will last far longer than your typical replacement or bulk rubber hose would.
 
The most common issue on SPI Minis is vacuum line failure. Over the years these hoses are very prone to breaking, or having the ends fall apart, resulting in a vacuum leak or loss of signal to the MAP sensor in the ECU. So if your SPI Mini is running rich, dying out, stumbling, or having other odd problems,- these are probably your ticket.