[Tomyyyu]

I’m reaching out for some guidance on header options for my 2023 GR86, which I primarily use for autocross. I’ve been looking into both equal-length and unequal-length headers but am uncertain which would provide the best performance for my setup, particularly in an autocross environment.

I understand that unequal-length headers are known for enhancing mid-range torque, while equal-length headers can provide better top-end gains. Given the frequent acceleration and lower top speeds in autocross, I’m wondering which would be more advantageous for my specific needs. Additionally, I’d appreciate any insights on how each option might affect drivability and overall performance.

Based on this video: [MEDIA=youtube]oMjJgCpFhOs[/MEDIA] Seems to me like when tuned the equal and unequal are the same at the top range. The only benefit I see is the unequal gains you more at the midrange.

In addition, don’t forget that Verus is open to making the pan fit the UEL JDL headers. As well as possibly formula delta. [MEDIA=youtube]eBHT5b3sf9o[/MEDIA]

Is there heat concerns with certain cylinder banks, due to it being unequal? Since half the cylinders will be hotter than the others due to the run length of the headers to the cylinders 1&3 and 2&4.


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