{"id":3244,"date":"2018-10-06T15:28:08","date_gmt":"2018-10-06T19:28:08","guid":{"rendered":"https:\/\/krissmotors.com\/XJ6\/?p=3244"},"modified":"2023-07-20T12:37:08","modified_gmt":"2023-07-20T16:37:08","slug":"exhaust-system","status":"publish","type":"post","link":"https:\/\/krissmotors.com\/XJ6\/2018\/10\/06\/exhaust-system\/","title":{"rendered":"Exhaust system"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Topics<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2391059e8d5\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2391059e8d5\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/krissmotors.com\/XJ6\/2018\/10\/06\/exhaust-system\/#Downpipe_fabrication\" >Downpipe fabrication<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/krissmotors.com\/XJ6\/2018\/10\/06\/exhaust-system\/#Rear_components\" >Rear components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/krissmotors.com\/XJ6\/2018\/10\/06\/exhaust-system\/#Tail_pipe\" >Tail pipe<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Downpipe_fabrication\"><\/span>Downpipe fabrication<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The straight six original 4.2L Jaguar engine had exhaust manifolds only on the left side of the block. <\/p>\n<p>The V8 LS3 has dual manifolds on opposing sides of the block, so obviously the downpipes coming off of the manifolds must be custom fitted and will hug both sides of the engine block. The fitment, especially on the left side due to the steering column, is very tight.<\/p>\n<div id=\"attachment_3761\" style=\"width: 982px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3761\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe.png\" alt=\"\" width=\"972\" height=\"1103\" class=\"size-full wp-image-3761\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe.png 972w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe-291x330.png 291w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe-768x872.png 768w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/welded-downpipe-902x1024.png 902w\" sizes=\"auto, (max-width: 972px) 100vw, 972px\" \/><\/a><p id=\"caption-attachment-3761\" class=\"wp-caption-text\">Left side downpipe welded to the manifold<\/p><\/div>\n<p>See the discussion about <a href=\"https:\/\/krissmotors.com\/XJ6\/2018\/04\/05\/exhaust-manifold-options\/\">exhaust manifold fitment<\/a>. The optimal manifold is a &#8220;center dump&#8221; configuration but a suitable GM off-the-shelf option isn&#8217;t available. Instead, a downpipe must be welded to the 2161 (Corvette 2005) manifold which is <em>reverse installed<\/em> (left and right sides swapped) to get the best clearance.<\/p>\n<div id=\"attachment_3763\" style=\"width: 894px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/ground-flange-weld.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3763\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/ground-flange-weld.png\" alt=\"\" width=\"884\" height=\"975\" class=\"size-full wp-image-3763\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/ground-flange-weld.png 884w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/ground-flange-weld-299x330.png 299w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/ground-flange-weld-768x847.png 768w\" sizes=\"auto, (max-width: 884px) 100vw, 884px\" \/><\/a><p id=\"caption-attachment-3763\" class=\"wp-caption-text\">Flange ears are ground down with welded center dump pipe<\/p><\/div>\n<p>The flange &#8220;ears&#8221; on the 2161 manifold were ground down with a center dump pipe welded to the modified flange face. Welding saves space and makes it possible to fit the downpipe in past the steering column.<\/p>\n<p>As the pipes run past the transmission oil pan, a Y-connector joins the left and right sides together (this helps balance the exhaust pressures). <\/p>\n<div id=\"attachment_3764\" style=\"width: 1088px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3764\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector.png\" alt=\"\" width=\"1078\" height=\"1006\" class=\"size-full wp-image-3764\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector.png 1078w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector-330x308.png 330w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector-768x717.png 768w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Y-connector-1024x956.png 1024w\" sizes=\"auto, (max-width: 1078px) 100vw, 1078px\" \/><\/a><p id=\"caption-attachment-3764\" class=\"wp-caption-text\">Y-connector join on the left side of the transmission oil pan<\/p><\/div>\n<p>A single exhaust pipe run along the left side of the propeller shaft until a Y-split mates with the twin rear exhaust components.<\/p>\n<div id=\"attachment_3765\" style=\"width: 1194px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3765\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split.png\" alt=\"\" width=\"1184\" height=\"841\" class=\"size-full wp-image-3765\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split.png 1184w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split-330x234.png 330w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split-768x546.png 768w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/join-and-split-1024x727.png 1024w\" sizes=\"auto, (max-width: 1184px) 100vw, 1184px\" \/><\/a><p id=\"caption-attachment-3765\" class=\"wp-caption-text\">Manifold join and rear exhaust split points<\/p><\/div>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Rear_components\"><\/span>Rear components<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The XJ6 rear exhaust components remained virtually unchanged between 1968 and 1987 except for minor hanger variations and slip joint versus flange pipe connections.<\/p>\n<div id=\"attachment_3250\" style=\"width: 695px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/S1-exhaust-rear.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3250\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/S1-exhaust-rear.png\" alt=\"\" width=\"685\" height=\"759\" class=\"size-full wp-image-3250\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/S1-exhaust-rear.png 685w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/S1-exhaust-rear-298x330.png 298w\" sizes=\"auto, (max-width: 685px) 100vw, 685px\" \/><\/a><p id=\"caption-attachment-3250\" class=\"wp-caption-text\">XJ6 Series 1 original rear exhaust specification<\/p><\/div>\n<p>But confusion still reigns due to a proliferation of Jaguar factory part numbers that drifted from model to model. Today none of these part numbers are relevant. <\/p>\n<div id=\"attachment_3252\" style=\"width: 604px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/exhaust-PN.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3252\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/exhaust-PN.png\" alt=\"\" width=\"594\" height=\"273\" class=\"size-full wp-image-3252\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/exhaust-PN.png 594w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/exhaust-PN-330x152.png 330w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/a><p id=\"caption-attachment-3252\" class=\"wp-caption-text\">Notes: [1] exits left side, not center [2] requires olive GEX7491<br \/><\/p><\/div>\n<p><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-JR-026-exhaust.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-JR-026-exhaust.png\" alt=\"\" width=\"648\" height=\"208\" class=\"aligncenter size-full wp-image-3759\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-JR-026-exhaust.png 648w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-JR-026-exhaust-330x106.png 330w\" sizes=\"auto, (max-width: 648px) 100vw, 648px\" \/><\/a><\/p>\n<p>One popular &#8220;stock&#8221; system is an aftermarket product manufactured by Bell with five different models that reflect the minor variations of the OEM components.<\/p>\n<div id=\"attachment_3253\" style=\"width: 751px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-SKUs.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3253\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-SKUs.png\" alt=\"\" width=\"741\" height=\"151\" class=\"size-full wp-image-3253\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-SKUs.png 741w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/Bell-SKUs-330x67.png 330w\" sizes=\"auto, (max-width: 741px) 100vw, 741px\" \/><\/a><p id=\"caption-attachment-3253\" class=\"wp-caption-text\">Bell exhaust part numbers<\/p><\/div>\n<p>The JR026 system, highlighted in yellow, is the best fit for our Series 1 and also features silencers that exit towards the transmission tunnel (unlike the original Series 1 design that exited on the left side) that will accommodate our dual pipes for the LS3 manifolds.<\/p>\n<p>We use most of the long pipe, cutting it off after it joins into a single pipe (see Bell illustration above) and then fitting in a join for the dual pipes running up to the engine manifolds.<\/p>\n<div id=\"attachment_3766\" style=\"width: 1009px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3766\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust.png\" alt=\"\" width=\"999\" height=\"1365\" class=\"size-full wp-image-3766\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust.png 999w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust-242x330.png 242w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust-768x1049.png 768w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/dual-exhaust-749x1024.png 749w\" sizes=\"auto, (max-width: 999px) 100vw, 999px\" \/><\/a><p id=\"caption-attachment-3766\" class=\"wp-caption-text\">Bell dual mufflers mated to the modified dual LS3 manifolds<\/p><\/div>\n<div id=\"attachment_3767\" style=\"width: 1214px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3767\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru.png\" alt=\"\" width=\"1204\" height=\"710\" class=\"size-full wp-image-3767\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru.png 1204w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru-330x195.png 330w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru-768x453.png 768w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/rear-passthru-1024x604.png 1024w\" sizes=\"auto, (max-width: 1204px) 100vw, 1204px\" \/><\/a><p id=\"caption-attachment-3767\" class=\"wp-caption-text\">Muffler to silencer through-the-cage pass through<\/p><\/div>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tail_pipe\"><\/span>Tail pipe<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The only esthetic choice in the exhaust system is the tail pipe: straight like American muscle cars or S-shaped, a reflection of traditional Jaguar elegance. There is an argument for both.<\/p>\n<div id=\"attachment_3265\" style=\"width: 887px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/straight-pipes.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3265\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/straight-pipes.png\" alt=\"\" width=\"877\" height=\"674\" class=\"size-full wp-image-3265\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/straight-pipes.png 877w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/straight-pipes-330x254.png 330w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/straight-pipes-768x590.png 768w\" sizes=\"auto, (max-width: 877px) 100vw, 877px\" \/><\/a><p id=\"caption-attachment-3265\" class=\"wp-caption-text\">Straight pipes on an LS converted Jaguar XJ coupe<\/p><\/div>\n<p>Straight pipes are consistent with the powerful 430 HP engine we&#8217;re installing. They are blunt and to the point. On the other hand, curved tail pipes underscore the British heritage.<\/p>\n<div id=\"attachment_3266\" style=\"width: 823px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/curved-pipes.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3266\" src=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/curved-pipes.png\" alt=\"\" width=\"813\" height=\"423\" class=\"size-full wp-image-3266\" srcset=\"https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/curved-pipes.png 813w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/curved-pipes-330x172.png 330w, https:\/\/krissmotors.com\/XJ6\/wp-content\/uploads\/curved-pipes-768x400.png 768w\" sizes=\"auto, (max-width: 813px) 100vw, 813px\" \/><\/a><p id=\"caption-attachment-3266\" class=\"wp-caption-text\">Curved tail pipes on a 1972 Jaguar XJ6<\/p><\/div>\n<p>We&#8217;re going with curved (it&#8217;s very easy to swap out tail pipes).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Downpipe fabrication The straight six original 4.2L Jaguar engine had exhaust manifolds only on the left side of the block. The V8 LS3 has dual manifolds on opposing sides of the block, so obviously the downpipes coming off of the manifolds must be custom fitted and will hug both sides&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":3766,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[],"class_list":["post-3244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exhaust"],"acf":[],"_links":{"self":[{"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/posts\/3244","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/comments?post=3244"}],"version-history":[{"count":10,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/posts\/3244\/revisions"}],"predecessor-version":[{"id":4660,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/posts\/3244\/revisions\/4660"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/media\/3766"}],"wp:attachment":[{"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/media?parent=3244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/categories?post=3244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/krissmotors.com\/XJ6\/wp-json\/wp\/v2\/tags?post=3244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}