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Turbomaster Wastegate Controllers

Quadstar Tuning LLC

  • $159.00

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


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