{"product_id":"e-cowlboy-7040-piston-ring-compressor-adapter-set-for-5-4-bore-cummins-isx-qsx-cat-c15-4-piece-heavy-duty-steel","title":"E-cowlboy 7040 Piston Ring Compressor Adapter Set for 5.4\" Bore Cummins ISX\/QSX \u0026 Cat C15 — 4-Piece, Heavy-Duty Steel","description":"\u003cp\u003e\u003cstrong\u003eThe E-cowlboy 7040 piston ring compressor kit is a four-piece installer and adapter set engineered to help fit piston rings into 5.4\" bore Cummins ISX\/QSX and Caterpillar 3400\/C-15 engines without damaging the rings or cylinder liners.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete description explains what the kit contains, which engines it fits, how it works with existing compressors, and why the construction matters for heavy-duty diesel service. The parts are made as OEM-alternatives to PT-7040 and related numbers, built from heavy-duty steel and finished with a corrosion-resistant coating. The kit is intended to work with anti-polishing cylinder liners and reduces frustration and downtime during engine rebuilds or piston servicing.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit make installing piston rings easier?\u003c\/h3\u003e\n\u003cp\u003eThe 7040 adapter set mates with an existing piston ring compressor to guide rings into the bore and prevent scraping or catching on anti-polishing liners. It holds rings concentric around the piston and funnels them smoothly into the cylinder, reducing the chance of ring breakage or deformation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour-piece adapter set designed for 5.4\" bore pistons\u003c\/li\u003e\n  \u003cli\u003eWorks alongside standard piston ring compressors\u003c\/li\u003e\n  \u003cli\u003eReduces risk of ring chipping or liner damage\u003c\/li\u003e\n  \u003cli\u003eSaves time during rebuild and reassembly tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and part numbers is this compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis kit fits Cummins ISX15 and QSX15, and Caterpillar 3400-series engines including 3406, 3408, 3412 and C15 with a 5.4\" bore. It is supplied as an aftermarket alternative to PT-7040 and the OEM numbers 5394454, 5299448, 5299447 and 5299339, manufactured to match OEM dimensions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned specifically for 5.4\" bore diesel pistons\u003c\/li\u003e\n  \u003cli\u003eCompatible with Cummins ISX\/QSX15 and Caterpillar 3400\/C15 families\u003c\/li\u003e\n  \u003cli\u003eDirect alternative to listed OEM part numbers\u003c\/li\u003e\n  \u003cli\u003ePrecision tolerances to fit standard compressors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and production methods ensure durability?\u003c\/h3\u003e\n\u003cp\u003eThe components are made from premium heavy-duty steel using centrifugal casting for consistent density and strength. A bright red protective paint over a hardened surface helps resist corrosion, deformation and wear from workshop use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCentrifugal casting for uniform strength and minimal porosity\u003c\/li\u003e\n  \u003cli\u003eHigh hardness steel to withstand repeated installations\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant red coating for longer service life\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined interfaces to maintain concentricity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat support and warranty does E-cowlboy provide?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes a 30-day return policy plus a 12-month warranty backed by E-cowlboy customer support. If the product doesn’t meet expectations you can return it for a refund within the specified period and access warranty service for manufacturing defects.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e30-day money-back return policy\u003c\/li\u003e\n  \u003cli\u003e12-month limited warranty on manufacturing defects\u003c\/li\u003e\n  \u003cli\u003eCustomer service available for fitment and usage questions\u003c\/li\u003e\n  \u003cli\u003eClear compatibility notes to avoid purchasing errors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This 7040 piston ring compressor adapter kit is aimed at diesel mechanics, engine rebuild shops, fleet maintenance teams and knowledgeable DIYers working on Cummins ISX\/QSX15 or Caterpillar 3400-series engines with a 5.4\" bore. Choose this kit when you need OEM-compatible adapters to protect piston rings and anti-polishing liners during assembly, shorten installation time, and rely on durable steel parts with warranty support.\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: Will this kit fit Cummins ISX15 and QSX15 engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it's designed for Cummins ISX15 and QSX15 engines with a 5.4\" bore and matches OEM dimensions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include a warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — E-cowlboy offers a 30-day return policy and a 12-month warranty for manufacturing defects.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"E-cowlboy","offers":[{"title":"Default Title","offer_id":48081519935646,"sku":"B088R9QNXM","price":199.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/e-cowlboy-front-packaging-7040-kit.jpg?v=1785807093","url":"https:\/\/northtrailauto.ca\/products\/e-cowlboy-7040-piston-ring-compressor-adapter-set-for-5-4-bore-cummins-isx-qsx-cat-c15-4-piece-heavy-duty-steel","provider":"North Trail Auto","version":"1.0","type":"link"}