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    • Shannon Whitehead
      Keymaster
      September 30, 2014 at 3:35 pm
      Post count: 274799
      #135683

      Best to just call John to get all the details but its hard to beat the Belangers.

    • Shannon Whitehead
      Keymaster
      September 30, 2014 at 3:56 pm
      Post count: 274799
      #135690

      I was hearing that the American racing headers are out flowing the belanger headers ? anyone have any experience with this ?

    • ViperDog
      Member
      October 1, 2014 at 1:07 pm
      Post count: 142
      #135992

      Bigger isn’t always better. I believe the factory size is quite small – 1.5 I think. 1.75 is plenty sufficient. Throttle response is better when staying on the smaller side. More performance isn’t just about flow; it’s also velocity at lower speeds.

    • Shannon Whitehead
      Keymaster
      October 1, 2014 at 3:27 pm
      Post count: 274799
      #136059

      ViperDog said:
      Bigger isn't always better. I believe the factory size is quite small – 1.5 I think. 1.75 is plenty sufficient. Throttle response is better when staying on the smaller side. More performance isn't just about flow; it's also velocity at lower speeds.

      Bingo. Port velocity, mixing, and scavenging effects as a function of header step design is crucial. Not just about having huge primaries or collectors.

    • Shannon Whitehead
      Keymaster
      June 11, 2025 at 2:12 am
      Post count: 274799
      #15383

      I’m just curious to why not many people run HPE headers. I tried the search but came up with little info on these headers.
      Is there a benefit for running 1 3/4″ primaries compared to the 1 7/8″ with a 3″ exhaust?

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