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    Results 1 to 3 of 3
    1. #1
      Join Date
      Nov 2007
      Location
      Windsor, Ontario
      Posts
      91
      Country Flag: Canada

      LS3 vs LS7 fuel rail swap & injectors

      I have an LS3 fuel rail with injectors. Can I use the on the LS7 with stock manifold that I'm assembling.
      I know that the injectors are the same but do they need a different O-ring to fit the LS7 manifold?



    2. #2
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      16,129
      Country Flag: United States
      I'm not 100% sure, but I believe the Ls3 rails are different than the LS7 rails. Hopefully someone knows for sure.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @dr__efi
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    3. #3
      Join Date
      Jun 2010
      Location
      Deployed
      Posts
      3,376
      Country Flag: United States
      I have the LS3 rail on my LS7. The only thing I had to be mindful of was shortie injectors.
      1970 Camaro/DSE build


      Are you driver enough? Maybe....come on blue!
      https://www.pro-touring.com/threads/...71#post1147371


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