Interpreting PipeMax 3.98 4-2-1 lengths

[fsp_42]

Hi. I am double checking the primary / secondary lengths that PipeMax is returning before having a header built. Below is what I am getting out of the software (ver 3.98).

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  --- 2-Step Equal Segment Length TRI-Y --- ( Low to MidRange RPM TQ and HP )
1st Y-Segment Dia. inches= 1.424  Length= 11.7 to 13.0 inches long
2nd Y-Segment Dia. inches= 1.549  Length= 11.7 to 13.0 inches long
Combined Total of all Segment Lengths= 23.3 to 26.1 inches long

This one seems straightforward. Primary and secondaries the same length.

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  --- 3-Step TRI-Y Specs --- ( Low to Mid-Range Torque and Hi RPM HP )
1st Y-Segment 1st Step Dia. inches= 1.424  Length= 11.7 to 13.0
1st Y-Segment 2nd Step Dia. inches= 1.549  Length= 5.8 to 6.5
2nd Y-Segment 3rd Step Dia. inches= 1.674  Length= 5.8 to 6.5
Combined Total of all Segment Lengths= 23.3 to 26.1 inches long

 --- 3-Step TRI-Y Pipe Specs --- ( Higher RPM Horsepower, possible TQ loss )
1st Y-Segment 1st Step Dia. inches= 1.624  Length= 11.7 to 13.0
1st Y-Segment 2nd Step Dia. inches= 1.749  Length= 5.8 to 6.5
2nd Y-Segment 3rd Step Dia. inches= 1.874  Length= 5.8 to 6.5
Combined Total of all Segment Lengths= 23.3 to 26.1 inches long

The 3 step is where I am not 100% sure. It reads like the primary first length is 11.7" and then a step up in size for 5.8" giving a total primary size of 17.5" then the first "Y" connection and shorter 5.8" primaries to the second "Y" connection. Am I reading that right? It seemed odd that on the 2 step header the primary and secondaries show the same length compared to the 3 step.

Any help would be appreciated!

[Adger Smith]

Do the 2 step.
Most of the Comp combinations I have had headers built for go down the track as fast or faster with 2 step.
3 step usually shows up only on the dyno.
It makes fitting in the car so much easier, too.
My .02 for free