{"id":2265,"date":"2019-07-24T02:34:56","date_gmt":"2019-07-24T09:34:56","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=2265"},"modified":"2024-08-30T16:50:52","modified_gmt":"2024-08-30T23:50:52","slug":"how-loud-is-too-loud","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-loud-is-too-loud\/","title":{"rendered":"How Loud is Too Loud for an Exhaust System?"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column2265_cbce6f-8a > .kt-inside-inner-col,.kadence-column2265_cbce6f-8a > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column2265_cbce6f-8a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column2265_cbce6f-8a > .kt-inside-inner-col{flex-direction:column;}.kadence-column2265_cbce6f-8a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column2265_cbce6f-8a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column2265_cbce6f-8a{position:relative;}@media all and (max-width: 1024px){.kadence-column2265_cbce6f-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column2265_cbce6f-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column2265_cbce6f-8a inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-429226  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-d7df5b\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23, .wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23[data-kb-block=\"kb-adv-heading2265_f70012-23\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23[data-kb-block=\"kb-adv-heading2265_f70012-23\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading2265_f70012-23[data-kb-block=\"kb-adv-heading2265_f70012-23\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading2265_f70012-23 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2265_f70012-23\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>According to California state law, the absolute loudest a light vehicle can be is 95 decibels.<\/li>\n\n\n\n<li>Getting a muffler or a resonator can help minimize a vehicle&rsquo;s noise.<\/li>\n\n\n\n<li>The police are allowed to use their judgment to determine whether a vehicle is too loud.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Performance vehicles have always been associated with how beautiful their exhaust notes are. Muscle cars give off a loud and throaty V8 bellow while supercars give off a higher-pitched, rich jet engine-like V12 roar.<\/p>\n\n\n\n<p>People who can&rsquo;t afford the models that come with these unique exhaust notes can modify their cars to have similar or even grander-sounding exhausts. Mufflers and resonators are mainly responsible for the volume of your engine&rsquo;s noise.<\/p>\n\n\n\n<p>Starting 2019, you would have to be more mindful of your vehicle&rsquo;s sound, especially if you&rsquo;re from California. An assembly bill which controls modifications to a car&rsquo;s exhaust noise may affect you even if you don&rsquo;t live in the state.<\/p>\n\n\n<div class=\"wp-block-image is-resized wp-image-2266 size-full\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"714\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_211174798.jpg\" alt=\"\" class=\"wp-image-2266\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_211174798.jpg 1000w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_211174798-300x214.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_211174798-768x548.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\"><figcaption class=\"wp-element-caption\">The Dodge Challenger Hellcat can produce up to 105dB.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">What does a Muffler and Resonator do?<\/h2>\n\n\n\n<p>The exhaust system of your car is comprised of interlinking pipes that stretch from the engine to the rear of the vehicle. Exhaust pipes need to run a long distance to be able to cool the exhaust gasses coming from the engine. This also gives the exhaust gasses an opportunity to run through the catalytic converter making it less toxic to the environment.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<p>Situated after the catalytic converter is the muffler, which deadens the exhaust noise without stopping the flow of exhaust gas. The muffler achieves this by making the sound waves counteract each other, effectively softening the noise. A resonator is a secondary or substitute sound eliminator to the muffler. The resonator and muffler complement each other and have many combinations. Some lessen the noise while others are tailor made to be loud.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What exactly is too loud?<\/h2>\n\n\n\n<p>California state law has said that the absolute loudest a light vehicle can be is 95-decibels(dB) tested under the Society of Automotive Engineers (SAE) under test procedure J1169 (May 1998.) Vehicles with a gross weight of less than 6,000 pounds and motorcycles are included in this state law. This has been part of California&rsquo;s vehicle code for years. Vehicle Code 27150 states that all cars registered under the state of California are required to have an adequate muffler that is properly maintained and operating. Vehicle Code 27151 explains the parameters of the <a href=\"https:\/\/www.carparts.com\/blog\/web-stories\/most-illegal-car-accessories\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"noise limit\">noise limit<\/a> set for vehicles registered in the state of California.<\/p>\n\n\n<div class=\"wp-block-image is-resized wp-image-2267 size-full\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_110780420.jpg\" alt=\"\" class=\"wp-image-2267\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_110780420.jpg 1000w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_110780420-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_110780420-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_110780420-600x400.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\"><figcaption class=\"wp-element-caption\">California state law stipulates that the absolute loudest a light vehicle can be is 95-decibels(dB) tested under the Society of Automotive Engineers (SAE) under test procedure J1169 (May 1998.)<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">What is the fuss with California Assembly Bill 1824?<\/h2>\n\n\n\n<p>Many car enthusiasts have been making a big deal about AB 1824, which was signed into effect in January 2019 by then-California State Governor Jerry Brown. AB 1824 does not change the state&rsquo;s vehicle code on how loud the exhaust noise can be on your car but affects what happens when you get caught by the cops for an exhaust noise violation. Before 2019, when you get pulled over for an exhaust noise violation, you would receive a &ldquo;Fix-it ticket&rdquo; giving you 30 days to fix your vehicle&rsquo;s exhaust system to the state&rsquo;s regulation. Providing proof within the 20 day period will void you from paying fines.<\/p>\n\n\n\n<p>Life after AB 1824 still allows for a modified exhaust pumping out all sorts of noise within the 95-dB limit. However, if you get caught for an exhaust noise violation, expect that you will be fined. Fine for this violation in the state of California can range upwards of $1000. The Specialty Equipment Market Association or <a href=\"https:\/\/www.sema.org\/sema-enews\/2019\/02\/fact-vs-fiction-explaining-californias-new-exhaust-noise-law\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"SEMA issued a press release\">SEMA issued a press release<\/a> clarifying the concerns of car enthusiasts.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Is It Safe to Travel With a Loud Car?<\/h2>\n\n\n\n<p>There are a handful of reasons why it&rsquo;s unsafe to travel with a loud car. Some of them include safety concerns and possible legal issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Safety Concerns<\/h3>\n\n\n\n<p>Loud sounds may mask the noises that indicate problems with certain components. For example, you may not hear the screeching sound when braking caused by brake pad wear.<\/p>\n\n\n\n<p>Similarly, you may not hear the squealing noise coming from the hood when driving, which could be a sign of a loose or worn serpentine belt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Possible Legal Issues<\/h3>\n\n\n\n<p>As mentioned above, you could get fined for excess noise. Similarly, you could get in trouble when driving a loud car during late hours in residential areas since the homeowners can report you.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Distracted Driving<\/h3>\n\n\n\n<p>Lastly, loud cars can be distracting to other drivers and pedestrians. This could lead to accidents caused by panicking and impaired concentration. In the same vein, you might not hear a pedestrian telling you to stop or the whistle from an oncoming train.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How loud is 95-dB?<\/h2>\n\n\n\n<p>According to the <a href=\"https:\/\/www.cdc.gov\/nceh\/hearing_loss\/what_noises_cause_hearing_loss.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"Centers for Disease Control Prevention (CDC)\">Centers for Disease Control Prevention (CDC)<\/a>, noise above 85dB over a prolonged period may start to damage your hearing. A leaf blower or a gas-powered lawn mower is already 85dB while a concert or a club can range from 105-110dB. 95dB is plenty loud, but some cars come out of the factory exceeding that limit. The Dodge Challenger Hellcat produces upwards of 105dB when pushed to the limit. Skirting the limit is the Ford Mustang Shelby GT350R which produces 92dB of exhaust noise.<\/p>\n\n\n\n<p>A police officer has to use his best judgment to enforce the 95dB limit, which has people up in arms saying the rule is vague and that different people interpret sound differently.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How does this affect me?<\/h2>\n\n\n\n<p>California is just an example of what can happen to other states. There are existing exhaust noise laws across the United States that can be clarified using <a href=\"https:\/\/www.semasan.com\/resources\/exhaust-noise-laws-state\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"this map which SEMA\">this map which SEMA<\/a> organized. Some are saying this is a ploy to increase the income of the city while others claim it&rsquo;s a step to fighting illegal street racing. Whatever the real reason behind it, there should be a clear method of determining what is too loud before issuing a ticket. For now, you should make sure that your vehicle is operating with a maintained and working muffler. If you have a modified exhaust system, make sure that it complies with SAE J1169. Have proof that your vehicle has been tested and is still within the law. This will be vital in escaping that $1000 fine when a cop accuses you of having a vehicle that&rsquo;s &ldquo;too loud.&rdquo;<\/p>\n\n\n<div class=\"wp-block-image is-resized wp-image-2269 size-full\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_1416240935.jpg\" alt=\"\" class=\"wp-image-2269\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_1416240935.jpg 1000w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_1416240935-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_1416240935-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2019\/07\/shutterstock_1416240935-600x400.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\"><figcaption class=\"wp-element-caption\">Make sure you comply with SAE J1169 if you have a modified exhaust system.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\"> \n\n  \n\n    <!-- start of editable content --> \n\n    <a href=\"https:\/\/www.carparts.com\/muffler\" target=\"_blank\" aria-label=\"muffler\" rel=\"noopener\"> \n\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/rm96110001_1\" alt=\"muffler\"> \n\n<strong>Muffler<\/strong> \n\n    <\/a> \n\n    <a href=\"https:\/\/www.carparts.com\/resonator\" target=\"_blank\" aria-label=\"resonator\" rel=\"noopener\"> \n\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/rs96110003_1\" alt=\"resonator\"> \n\n<strong>Resonator<\/strong> \n\n    <\/a> \n\n \n    <a href=\"https:\/\/www.carparts.com\/exhaust-pipe\" target=\"_blank\" aria-label=\"exhaust pipe\" rel=\"noopener\"> \n\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/rr96290003_1\" alt=\"exhaust pipe\"> \n\n<strong>Exhaust Pipe<\/strong> \n\n    <\/a> \n\n\n     <!-- end of editable content --> \n\n  \n\n<\/div>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Performance vehicles have always been associated with how beautiful their exhaust notes are. Muscle cars give off a loud and&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-loud-is-too-loud\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":2268,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52],"tags":[1237],"ppma_author":[2607],"class_list":{"0":"post-2265","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"tag-exhaust-system-2","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Loud is Too Loud for an Exhaust System? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"A loud exhaust makes high performance cars sound as good as they look. Discover how loud is too loud according to the law.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/how-loud-is-too-loud\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Loud is Too Loud for an Exhaust System? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"A loud exhaust makes high performance cars sound as good as they look. 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