04-05 Duramax LLY RPI 4" Stage 1 Cold Air Intake

  • Sale
  • Regular price $394.99

This is our full metal 4" Cold Air Intake system for 04.5-05 LLY Duramax

☆☆ Only fits with LBZ Mouthpiece or HSP Mouthpiece ☆☆

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

No check engine lights with this system!

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

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!

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.

Comes with S&B Oiled Filter or AEM Dry Flow Filter

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



Ask a Question
  • I saw that there are 4 options for filters. Which one is the best for flow? Which is the best for filtration? Which one do you recommend to people? Thanks.

    Well the amsoil is the best seller, but green filter is really good also for flow and filtration. If it were my truck, I would use any of the 3 filters: Amsoil, aFe Pro Dry S, Green Filter

  • Does this require any tuning?

    No it does not 

  • I have an S & B mouthpiece will that work

    So the stock lly mouthpiece or s&b mouthpiece will need a 3.5" to 4" silicone coupler, and a 30 degree 4" tube around 4"-5" long to fit the lbz style intake system, its not the cleanest look.... I would recommend the lbz hsp mouthpiece, it can be color matched and looks vary clean and flows extremely well on lly