Diamond Eye Turbo Down Pipe Install

Here is an Installation Guide for the turbo direct or downpipe.

Vehicle in Pics: 2005 GMC Duramax

Avg. Time Needed: 2-3hrs

Tool Needed:

  • 10mm, 11mm, 14mm, Sockets
  • 3/8 Ratchet or 3/8 Air ratchet
  • A Pry bar
  • A can of penetrating lube (PB Blaster)


  1. Remove passenger wheel and wheel well (fender liner) 
  2. take front pipe loose from down pipe . remove front pipe if possible.
  3. Remove bolt on bottom of downpipe and 3 bolts in heatshield
  4. Loosen 2 nuts on dipstick most say remove dipstick but you might not have to. (This is probably the hardest part of this install)
  5. Remove turbo heatshield.
  6. Take off band from turbo to downpipe.
  7. Wiggle downpipe from bottom it may be stuck pretty good (Spray top with pb blaster and work it back and forth to get it out.
  8. Clean the turbo outlet to get rid of any soot.
  9. Also clean the downpipe where it goes into turbo.
  10. Put a little lube on it to get it in.
  11. Install turbo clamp. 
  12. Bolt in bottom.
  13. Tighten dipstick tube , front pipe clamp. 
  14. Check for leaks.
  15. Replace wheel well.
  16. Finally test drive.


The bottom mount and the V-band clamp. Heat Shield Nuts Dipstick Nuts Top Band Clamp
Comparison Installed Lower mount and clamp.
About Us  ·  Contact Us  ·  Links  ·  Privacy Policy  ·  Testimonials