Quote:
Originally Posted by IHateBrakeDust
Do these valve controllers make that much in sound difference ? Hard to tell with youtube videos. The stock exhaust is loud enough with a downpipe for me but if the valve is not opening all the way... Id want to change that.
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Yes, they do (stock valves only open ~85% of capacity, max while the controller will open the valves fully)...will also add performance, the level of which depends on what other mods you have or will be doing.