Is there an upgrade line to make them louder. Does this already come with the shocker 240 kit? http://www.hornblasters.com/products/details.php?i=shocker-4-1-2-in-valve-upgrade-kit
it comes with the XL kit.
Is there an upgrade line to make them louder. Does this already come with the shocker 240 kit? http://www.hornblasters.com/products/details.php?i=shocker-4-1-2-in-valve-upgrade-kit
it comes with the XL kit.