{"title":"Mustang S550","description":"","products":[{"product_id":"mustang-gt-s550-2015-2023","title":"Mustang GT S550 8-4-1 System (2015-2023)","description":"\u003cp\u003eAfter a successful proof of concept and development on the Corvettes, we present you a brand new soundtrack to the Coyote. Equal length 8-4-1 headers for the Coyote engine set a new sound standard for the Coyote.\u003c\/p\u003e\n\u003cp\u003eIt was long considered impossible to fit equal length headers into the 2011+ Mustang.  In order to accomplish this we had to further push the boundaries and think further out of the box than any company has done for a production header.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Headers\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndividually CNC flanged 1.875\" primaries \u003c\/li\u003e\n\u003cli\u003eDouble slip joint 2.125\" secondaries\u003c\/li\u003e\n\u003cli\u003eCustom CNC engine brackets (OEM mounts)\u003c\/li\u003e\n\u003cli\u003eCustom titanium studs and hardware to facilitate the installation  \u003c\/li\u003e\n\u003cli\u003eManual transmission version uses a flat 4-1 collector to retain correct wave tuning lengths. Automatic version is experimental in regards to header lengths.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Exhaust\u003c\/p\u003e\n\u003cp\u003eJust like the Corvettes are equipped with good valved OEM mufflers, so are the Mustangs. We've proven there is more sound left on the table and we could improve on it. They are slightly louder than OEM with the valves closed and significantly louder with the valves open. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull 3\" straight through with the valve open (OEM and others are a 2.5\" valve)\u003c\/li\u003e\n\u003cli\u003eOEM valve control if originally equipped from factory (15+,24+ Mustang and GT350)\u003c\/li\u003e\n\u003cli\u003eON\/OFF control for any car not originally equipped \u003c\/li\u003e\n\u003cli\u003eTips Quad 4\"(OEM Active Bumper Valence fitment)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhy is it sold as a system only? (header\/midpipe available for motorsport applications)\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eWe wanted ZERO design contraints\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThere are no magic mufflers (all of the sound is produced by the header\/midpipe). They all cancel a broad range of frequencies. We designed ours to allow the most sound through them while still being comfortable enough for normal driving.\u003c\/li\u003e\n\u003cli\u003eWe don't need another exhaust (*marketing) company taking any credit for the truly innovative work we do\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Concept 841","offers":[{"title":"Manual \/ OEM","offer_id":51106726805806,"sku":null,"price":4700.0,"currency_code":"USD","in_stock":false},{"title":"Manual \/ Add ON\/OFF control","offer_id":51106726838574,"sku":null,"price":4700.0,"currency_code":"USD","in_stock":false},{"title":"Automatic \/ OEM","offer_id":51106726871342,"sku":null,"price":4700.0,"currency_code":"USD","in_stock":false},{"title":"Automatic \/ Add ON\/OFF control","offer_id":51106726904110,"sku":null,"price":4700.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/8284\/2670\/files\/S550_S650-1_2e768144-2a58-47a0-b57c-e58ed5d778dd.jpg?v=1776361258"},{"product_id":"mustang-gt-s550-s650-8-4-1-headers-and-midpipe-only","title":"Mustang GT S550\/S650 8-4-1 Headers and Midpipe ONLY","description":"\u003cp\u003e\u003cstrong\u003eThis is for the customers that have no use or need for mufflers. This is for the headers and midpipe ONLY\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe midpipe may line up with other exhaust, but will not be the correct diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAfter a successful proof of concept and development on the Corvettes, we present you a brand new soundtrack to the Coyote. Equal length 8-4-1 headers for the Coyote engine set a new sound standard for the Coyote.\u003c\/p\u003e\n\u003cp\u003eIt was long considered impossible to fit equal length headers into the 2011+ Mustang.  In order to accomplish this we had to further push the boundaries and think further out of the box than any company has done for a production header.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Headers\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndividually CNC flanged 1.875\" primaries \u003c\/li\u003e\n\u003cli\u003eDouble slip joint 2.125\" secondaries\u003c\/li\u003e\n\u003cli\u003eCustom CNC engine brackets (OEM mounts)\u003c\/li\u003e\n\u003cli\u003eCustom titanium studs and hardware to facilitate the installation  \u003c\/li\u003e\n\u003cli\u003eManual transmission version uses a flat 4-1 collector to retain correct wave tuning lengths. Automatic version is experimental in regards to header lengths.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Concept 841","offers":[{"title":"Manual","offer_id":51118259700014,"sku":null,"price":3600.0,"currency_code":"USD","in_stock":false},{"title":"Automatic","offer_id":51118259765550,"sku":null,"price":3600.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/8284\/2670\/files\/DSC07987.jpg?v=1776259314"},{"product_id":"s550-s650-gt350-gt500-pre-order-list-2","title":"*Pre-Order Round 2* Mustang S550 \/ S650 \/ GT350 \/ GT500","description":"\u003cp\u003eThis is strictly to save your spot for PRE-ORDER #2\u003c\/p\u003e\n\u003cp\u003eFull amount will go to your order. This is \u003cstrong\u003eFULLY REFUNDABLE \u003c\/strong\u003eat anytime. \u003c\/p\u003e\n\u003cp\u003eWe had originally planned to deliver in February, but we decided to make several improvements listed below. This is easily the most intricate production header system ever offered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePre-order #1 - Completed - Fulfilled April\/May 2026\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePre-order #2\u003c\/strong\u003e fulfillment target is \u003cstrong\u003eOct\/Sept \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e1) The flat 4-1 collector, while cool and different it is not optimal for sound. The quick split into two separate pipes doesn't allow a thorough mixing of both banks. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e2) The extra long midpipe had too much volume which resulted in low exhaust velocity and dulled some of the sound. We tested it with a single larger diameter pipe and there was a noticeable improvement.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e3) The O2 sensors were previously only taking readings from one secondary (two banks). The updated design gets O2 readings from all 4 cylinders per bank now. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e4) A catted version will now be available using four cats. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e5) We made the headers modular. The headers can be converted to equal length tri-ys for a different sound ( this will be later in the year )\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e6) GT500 kit will be  plug and play. No more oil pan trimming\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Concept 841 ","offers":[{"title":"Default Title","offer_id":51746445492526,"sku":null,"price":500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/8284\/2670\/files\/signal-2026-02-04-084029.png?v=1770687429"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/8284\/2670\/collections\/Mustang_Collection_S550.jpg?v=1781311767","url":"https:\/\/concept841.com\/collections\/mustang-s550.oembed","provider":"Concept 841 ","version":"1.0","type":"link"}