Kdh Posted October 10, 2021 Share Posted October 10, 2021 I have a 2.7 manual with PSE and when the valves are open the sound is perfect but just slightly too quiet. I have Boxster S twin tailpipes. Are there any mods I can do in the way of sports manifolds, cats, to up the volume slightly or am I stuck with what I've got. 'Opening the windows' is not an option in Winter. Many thanks! Link to comment Share on other sites More sharing options...
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