Delete your vacuum pump and gain the reliability you need for your 6.5L with genuine Turbo Masters!. Also known as a mechanical boost or wastegate controller. Typical variants include include the following but please ask if you are unsure because turbos are typically swapped from the OEM configuration: 1991-1995 6.5L Truck : GM3 or GM4 Turbo 1996-2000 6.5L Truck : GM5 or GM8 Turbo 1994+ H1 Hummer or Van : GM6 or GM7 Turbo Tuning is required to gain full benefits and prevent trouble codes with de-fueling. Contact us for options! A boost gauge is required with this product so you can set/monitor you boost levels. Order the boost bolt separately as a bolt-on way to add a boost gauge to stock intake plenums. When removing the vacuum pump completely, you will need to use a shorter serpentine belt. General information is as follows: 1994-1995: 101" - 101.5" Belt 1996+: 99.5" or 100" Belt Generally speaking they are ~1" shorter then the stock belt
