Holset HX Turbo Downpipe Adapter

Quadstar Tuning LLC

  • $135.00
  • Save $15



Bolt-on adapters for wastegated Holset exhaust housings.  These are designed to connect these popular turbo swaps to your factory or aftermarket downpipe in a matter of minutes.

The ORIGINAL HX swap pipes for 6.5L GMT400 trucks. Things WE have that "they" don't:

  • CNC cut tapered flange for downpipe connection will properly seal just like a factory turbo
  • Custom laser cut hole spacing accommodates small variations in backing plate bolt patterns without you having to grind or elongate holes for proper fitment

This is for the "Do it Yourself " DIY customer who needs the adapter as part of their turbo swap project.

Please choose the correct type based on the turbo you are using. PLEASE DOUBLE CHECK BEFORE ORDERING.

  • HX35W, HX40WII, WH1C
    • These typically have a 3" v-band flange on the exhaust plate that will be replaced by this adapter
  • HX40W
    • These typically have a 4" v-band flange on the exhaust plate that will be replaced by this adapter

*Be sure to check out our other listings for full install kits or other individual components you may need


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