{"product_id":"cmtool-exhaust-back-pressure-tester-kit-2-5-inch-gauge-6-ft-heat-resistant-hose-m12-m18-adapters","title":"CMTOOL Exhaust Back Pressure Tester Kit — 2.5-inch Gauge, 6 ft Heat-Resistant Hose \u0026 M12\/M18 Adapters","description":"\u003cstrong\u003eCMTOOL Exhaust Back Pressure Tester Kit is a professional diagnostic tool that measures exhaust back pressure with a 2.5-inch gauge, heat-resistant 6-foot hose, and M12\/M18 adapters for fast, accurate exhaust system troubleshooting.\u003c\/strong\u003e\n\n\u003cp\u003eThis kit is designed for mechanics and knowledgeable DIYers who need a reliable way to check exhaust back pressure without removing the exhaust system. The compact 2.5-inch dial provides clear PSI and Bar readouts, while the long, high-temperature resistant hose lets you test from inside the vehicle. Included adapters and a clamp make it simple to attach to many exhaust ports, and the rubber-covered gauge protects the instrument during routine shop use.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the gauge reveal exhaust problems?\u003c\/h3\u003e\n\u003cp\u003eThe CMTOOL gauge displays back pressure in both PSI and Bar and uses a three-color band system to indicate acceptable and excessive levels. Measuring at idle and under load helps you spot restrictions, clogged catalytic converters, or collapsed pipes that affect performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2.5-inch high-contrast dial with PSI and Bar scales for quick reading\u003c\/li\u003e\n  \u003cli\u003eThree color bands show safe, caution, and high-pressure ranges\u003c\/li\u003e\n  \u003cli\u003eCalibration checked at factory; zero adjustment accessible if needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the hose and fittings suitable for shop use?\u003c\/h3\u003e\n\u003cp\u003eThe 6-foot hose is molded from thickened nitrile rubber (NBR) that resists wear and tolerates temperatures up to about 70°C, so it stands up to hot undercarriage environments. Threads for common M12 and M18 adapter sizes plus a hose clamp give a secure connection to many exhaust test ports.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6-foot length enables testing from the driver’s seat or workbench\u003c\/li\u003e\n  \u003cli\u003eNBR construction for abrasion and heat resistance\u003c\/li\u003e\n  \u003cli\u003eM12 and M18 threaded adapters plus clamp for broad vehicle coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I read and interpret the results safely?\u003c\/h3\u003e\n\u003cp\u003eCheck pressure at idle and again around 2500 rpm; the gauge’s markings help determine whether pressure is within a normal range or signals a restriction. If the pointer is off zero on arrival, you can remove the protector and reset it—this won't affect the gauge’s ability to show back pressure during testing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTest at idle and at ~2500 rpm to compare values\u003c\/li\u003e\n  \u003cli\u003eExpect lower readings at idle and modest increases under higher revs\u003c\/li\u003e\n  \u003cli\u003ePointer reset possible after transit impact; factory calibration remains intact\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the tester for repeated diagnostic work?\u003c\/h3\u003e\n\u003cp\u003eThe gauge head is fitted with a rubber shock cover to absorb impacts and provide a nonslip grip, so it holds up to daily handling. Combined with rugged hose material and metal adapters, the kit is built for frequent diagnostics in a shop or garage environment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRubber protective cover for drop and vibration resistance\u003c\/li\u003e\n  \u003cli\u003eMetal adapters with standard threads for reliable attachment\u003c\/li\u003e\n  \u003cli\u003eDesigned for repeated use across multiple vehicle makes and models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this kit is for: The CMTOOL Exhaust Back Pressure Tester Kit suits professional technicians, advanced hobby mechanics, and anyone who performs engine performance troubleshooting. If you need a straightforward, portable tool to identify exhaust restrictions, verify catalytic converter condition, or confirm exhaust flow issues without disassembly, this kit offers a practical, shop-ready solution.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this tester measure in both PSI and Bar?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the gauge displays both PSI and Bar units simultaneously for easy reading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What if the needle isn't at zero after delivery?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: You can remove the cover and manually reset the pointer to zero without affecting calibration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CMTOOL","offers":[{"title":"Default Title","offer_id":48085880897694,"sku":"B09CCWDKR6","price":45.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/cmtool-exhaust-tester-front-gauge.jpg?v=1785879214","url":"https:\/\/northtrailauto.ca\/products\/cmtool-exhaust-back-pressure-tester-kit-2-5-inch-gauge-6-ft-heat-resistant-hose-m12-m18-adapters","provider":"North Trail Auto","version":"1.0","type":"link"}