Old setup:
Current setup:
It was NHRA legal before, and it still is of course, as I have an aluminum rear firewall that exceeds the NHRA requirement. I switched to a sealed box a few years back when I went to a typical lead acid battery instead of Optima (Optima is not known for quality anymore).
Current setup:
It was NHRA legal before, and it still is of course, as I have an aluminum rear firewall that exceeds the NHRA requirement. I switched to a sealed box a few years back when I went to a typical lead acid battery instead of Optima (Optima is not known for quality anymore).