{"product_id":"cmtool-exhaust-back-pressure-tester-kit-with-6ft-hose-carrying-case-2-5-dual-unit-gauge","title":"CMTOOL Exhaust Back Pressure Tester Kit with 6ft Hose \u0026 Carrying Case — 2.5\" Dual-Unit Gauge","description":"\u003cp\u003e\u003cstrong\u003eThe CMTOOL Exhaust Back Pressure Tester Kit is a portable diagnostic set that measures exhaust-system back pressure with a high-definition gauge, 6-foot heat-resistant hose, adapters, clamps and a protective carrying case.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete kit gives mechanics and DIYers a reliable way to check for restrictive exhaust components—such as clogged catalytic converters, damaged flex pipes or obstructed mufflers—without removing parts. Everything nests in a custom-molded black carrying case so tools stay organized and protected on the road or in a shop. The kit’s features focus on ease of use, visibility and durability for repeat testing across a wide range of passenger vehicles.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I set up the CMTOOL tester and start a measurement?\u003c\/h3\u003e\n\n\u003cp\u003eSetup is straightforward: attach the correct adapter (M12 or M18) to the test port, connect the 6-foot nitrile rubber hose, and clip the gauge into place. Run the engine at the specified conditions—idle and at 2500 rpm—to compare readings against recommended limits.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSelect M12 or M18 adapter for the vehicle exhaust port.\u003c\/li\u003e\n  \u003cli\u003eConnect the heat-resistant 6ft hose to keep the gauge outside the cab.\u003c\/li\u003e\n  \u003cli\u003eUse clamps supplied to secure the hose during testing.\u003c\/li\u003e\n  \u003cli\u003eRead pressure on the 2.5\" gauge in PSI or bar; note color-coded ranges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat readings indicate a restrictive exhaust and when should I be concerned?\u003c\/h3\u003e\n\n\u003cp\u003eThe gauge provides dual units and a tri-color visual scale to help you interpret results at a glance. Typical guidance for this tool is less than 1.25 psi at idle and under 3 psi at 2500 rpm; values above those thresholds suggest restriction that may need inspection or component replacement.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIdle: pressure should remain below 1.25 psi for most passenger cars.\u003c\/li\u003e\n  \u003cli\u003e2500 rpm: pressure should stay below 3 psi unless manufacturer specifies otherwise.\u003c\/li\u003e\n  \u003cli\u003eColor zones on the dial indicate acceptable, marginal, or problem ranges.\u003c\/li\u003e\n  \u003cli\u003eRepeat measurements after repairs to confirm improvement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the hose, gauge and case durable for shop use?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit uses a thickened nitrile rubber (NBR) hose rated to roughly 70°C for heat and wear resistance, suitable for reaching the exhaust port while staying outside the passenger compartment. The 2.5-inch gauge is fitted with a shock-absorbing rubber cover and calibrated pointer; the custom-molded carrying case keeps adapters, clamps and the gauge secure during transport and storage.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e6ft NBR hose resists abrasion and temperatures up to ~70°C.\u003c\/li\u003e\n  \u003cli\u003e2.5\" dual-unit gauge with protective rubber boot for impact resistance.\u003c\/li\u003e\n  \u003cli\u003ePre-calibrated pointer; adjustable to zero if impacted in transit.\u003c\/li\u003e\n  \u003cli\u003eCustom molded case organizes components and prevents loss.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan this kit be used across different cars and light trucks?\u003c\/h3\u003e\n\n\u003cp\u003eYes—the included M12 and M18 threaded adapters cover many common exhaust test ports across passenger cars and light trucks. The flexible 6-foot hose allows the gauge to remain accessible while testing, and the clamps help secure fittings on a variety of pipe diameters and locations.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eM12 and M18 adapters fit widespread exhaust ports and threaded plugs.\u003c\/li\u003e\n  \u003cli\u003eClamps secure hose and adapters on varying pipe sizes during testing.\u003c\/li\u003e\n  \u003cli\u003ePortable case makes it easy to carry between jobs or vehicles.\u003c\/li\u003e\n  \u003cli\u003eGauge reads in PSI and bar for universal interpretation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The CMTOOL Exhaust Back Pressure Tester Kit is designed for professional technicians, automotive shops, mobile mechanics and serious DIYers who need a compact, repeatable way to diagnose exhaust restrictions. It’s best for users who want quick visual results, a durable hose and gauge, and a tidy carrying case to keep adapters and clamps organized for field or shop diagnostics.\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: What adapters are included and what ports do they fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes M12 and M18 threaded adapters that fit common exhaust test ports on many cars and light trucks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the gauge need calibration before first use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The gauge is factory checked and calibrated; if the pointer is off zero after shipping, you can adjust it by removing the cover.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CMTOOL","offers":[{"title":"Default Title","offer_id":48082942034078,"sku":"B0DJS7JX7H","price":52.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/cmtool-exhaust-tester-front-in-case.jpg?v=1785819702","url":"https:\/\/northtrailauto.ca\/products\/cmtool-exhaust-back-pressure-tester-kit-with-6ft-hose-carrying-case-2-5-dual-unit-gauge","provider":"North Trail Auto","version":"1.0","type":"link"}