Jacko 2154 Report post Posted June 19, 2020 (edited) 32 minutes ago, IainR said: Just having a peak around the car and shined my torch down the tail pipes. I see there's an open butterfly valve in the LHS exhaust. Is this right or should it be closed until Im at higher revs or WOT? I've tried researching the operation of the valve but can't quite work out exactly how/when it's meant to be open or closed. Thanks for letting me pester you all with this topic! It runs on vacuum, so no vacuum (ie engines not running) it'll be open. Common mod is to disconnect it and stick a golf tee in the hole to stop the vacuum leak, makes it sound tougher at low load Edited June 19, 2020 by Jacko 1 Quote Share this post Link to post Share on other sites
IainR 55 Report post Posted June 30, 2020 Well, I'm finally a happy man! Sourced an original centre muffler from a wreckers and had it fitted this week. No more drone while under load and a much more respectable cruising note. It's made such a difference to how I feel driving the car around. Delighted! Thanks to everyone that chimed in and offered advice ? 3 Quote Share this post Link to post Share on other sites
GorGasm 563 Report post Posted July 1, 2020 Glad to hear you succeeded! Quote Share this post Link to post Share on other sites
