{"product_id":"porsche-718-gt4-spyder-gts-4-0l-drone-reduction-sound-symposer-delete","title":"Porsche 718 GT4 \/ Spyder \/ GTS 4.0L Drone Reduction Sound Symposer Delete","description":"\u003cp\u003eEasily plug your 718’s sound symposer to reduce in cabin drone!\u003c\/p\u003e\n\u003cp\u003eDo you have a 718 GT4\/Spyder\/GTS 4.0L and are you more sensitive to the amount of cabin drone\/resonance in your car, whether it be stock or accentuated by various aftermarket exhaust configurations? You’re not alone, and if you’ve been following our \u003ca href=\"https:\/\/rennlist.com\/forums\/718-gts-4-0-gt4-spyder-25th-anniversary\/1195716-soul-718-gt4-spyder-exhaust-development-56.html#post17353434\" target=\"_blank\" rel=\"noopener\"\u003eExhaust Development Thread\u003c\/a\u003e you might know that Porsche has piped extra sound into your cabin through the firewall right behind your seats via a vibrating diaphragm called a Sound Symposer (and this is not the only car they do this in). Over the past month or so a few Rennlist members and customers of ours have been pursuing DIY modifications of deleting that sound symposer, and have reported significant reduction in drone\/resonance in the cabin with different exhaust setups including various manufacturers. Spurred by this feedback, we documented the process for the Porsche community to reference, and hear the difference for ourselves.\u003c\/p\u003e\n\u003ch4 style=\"text-align: center\"\u003e\u003cspan style=\"color: #ff0000\"\u003eKIT INCLUDES TWO CAPS TO COVER ENGINE SIDE OF SYMPOSER AND FIREWALL PORT\u003c\/span\u003e\u003c\/h4\u003e\n\u003ch5 style=\"text-align: center\"\u003e\u003cstrong\u003eIf you have any questions about this process or the results – please contact us. Modify your vehicle at your own risk.\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: center\"\u003eTo start, here is a Porsche diagram to show the full scope and functionality of the sound symposer:\u003c\/p\u003e\n\u003cp\u003e\u003cimg id=\"inline0\" class=\"post_inline_image\" src=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Symposer-Diagram.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center\"\u003eWith all engine covers removed, here’s the symposer as it sits from the factory:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Symposer-Removal-1x.jpg\"\u003e\u003cimg class=\"aligncenter size-large wp-image-15722\" src=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Symposer-Removal-1x.jpg\" alt=\"\" width=\"1024\" height=\"683\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center\"\u003eSymposer section removed and remaining tubing capped:\u003c\/p\u003e\n\u003cp style=\"text-align: center\"\u003e\u003ca href=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Sympose-Installed.jpg\"\u003e\u003cimg class=\"aligncenter size-large wp-image-15721\" src=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Sympose-Installed.jpg\" alt=\"\" width=\"1024\" height=\"682\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center\"\u003eInterior side of the cabin port:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Symposer-Removal-4x.jpg\"\u003e\u003cimg class=\"aligncenter size-large wp-image-15723\" src=\"https:\/\/soulpp.com\/wp-content\/uploads\/2026\/02\/Soul-Performance-Products-718-40L-Sound-Symposer-Removal-4x.jpg\" alt=\"\" width=\"1024\" height=\"683\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe resulting delete is effective in reducing in cabin drone even on a stock 718. \u003c\/b\u003e \u003ca href=\"https:\/\/soulpp.com\/wp-content\/uploads\/2021\/11\/718-GT4-Sound-Symposer-Delete-Web.pdf\" target=\"_blank\" rel=\"nofollow noopener\"\u003eHere is a guide\u003c\/a\u003e we made to show the process (on a Boxster GTS but the steps will be very similar for other models).\u003c\/p\u003e","brand":"SOUL PERFORMANCE PRODUCTS","offers":[{"title":"Default Title","offer_id":43480484642877,"sku":"POR.718GT4.SS","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0898\/5024\/files\/Soul-Performance-Products-Porsche-718-GT4-Sound-Symposer-Plugs-1.jpg?v=1787011484","url":"https:\/\/www.euromotiv.com\/es\/products\/porsche-718-gt4-spyder-gts-4-0l-drone-reduction-sound-symposer-delete","provider":"Euromotiv","version":"1.0","type":"link"}