04-05 Duramax LLY RPI 4"Cold Air Intake Stage 2 With HSP mouthpiece

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  • Regular price $634.99

This is our full metal stage 2 Cold Air Intake system for 04.5-05 LLY Duramax

This system uses a huge 4 Inch T6 Aluminum intake tube for ultimate air flow!

**Click here to view available powder coating colors.**

You will have faster spool up, lower egt's, Noticeable Horsepower gain, some Mpg gain, and a turbo whistle that will make people look when your going through town!

Comes with color matched HSP high flow 3.5" mouthpiece, you will need to reroute your pcv for this kit

Has a bolt in heat shield that is vary well sealed to keep underhood temps away from the large Filter, it provides a fresh cold air supply straight to the filter for lower egt's and better performance. It is normal to see 150-250 deg drop in egt's with this system.

We use only the best filters on all our intake systems

These are Custom built to order,  so it takes 14-21 days to ship out, depending on how many orders we have that week.

  Cannot ship to California 


Ask a Question
  • Does this come with the air filter box?

    Yes it does, it is called the heat shield, and it has the metal lid on top that is removable to clean filter.

  • what is the difference between the stage 2 and the stage 1?

    The Stage 2 comes with the HSP High Flow Turbo Mouthpiece, The Stage 1 you would need to supply your own LBZ Mouthpiece, or HSP or WC Fab Mouthpiece.

  • What do you mean by aftermarket y bridge? The actual y bridge or the egr intake pipe?

    I just updated the listing, we were using the WCFab mouthpiece, and that one only fits aftermarket Y Bridge, now we use HSP mouthpiece and that will fir stock or aftermarket Y Bridge.