{"product_id":"ap-astro-pneumatic-tool-company-exhaust-pipe-stretcher-kit-metallic-impact-driven-1-5-8-4-1-4-range","title":"AP Astro Pneumatic Tool Company exhaust pipe stretcher kit, Metallic — impact‑driven, 1-5\/8\"–4-1\/4\" range","description":"\u003cp\u003e\u003cstrong\u003eThe Astro Pneumatic 78835 Exhaust Pipe Stretcher Kit is a heavy-duty, impact-driven expander set that stretches and sizes exhaust pipes from 1-5\/8\" to 4-1\/4\" for reliable fit-up and sealing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for professional mechanics and serious DIYers, this metallic exhaust pipe stretcher kit delivers repeatable expansion with a hardened steel expander and seven collet sizes. The tool is impact-driven and uses a 28mm bolt head to transfer force, enabling quick on-vehicle adjustments and tight seal creation where exhaust joints need precise sizing. Designed by AP Astro Pneumatic Tool Company, the kit focuses on durability and ease of use to speed up exhaust assembly and repair tasks.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit make exhaust pipe fitting faster?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit lets you expand the pipe end quickly using an impact driver rather than slow manual methods, cutting prep time on pipe joints. Its range of collet sizes eliminates frequent tool swaps and gets parts ready for clamp or weld attachment in a single operation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImpact-driven design for rapid expansion with an 28mm bolt head\u003c\/li\u003e\n\u003cli\u003eSeven collets covering 1-5\/8\" to 4-1\/4\" diameters for versatile sizing\u003c\/li\u003e\n\u003cli\u003eCollets are 2\" long to provide stable, even expansion along the pipe lip\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and torque recommendations should I follow?\u003c\/h3\u003e\n\n\u003cp\u003eThe expander and collets are steel for strength under impact loads and repeated use. Apply the included grease to threads before use to reduce wear; use an impact wrench rated at 800 ft-lbs or higher for most applications to ensure the collet fully expands without damaging the tool.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHardened steel expander and steel collets for long service life\u003c\/li\u003e\n\u003cli\u003eGrease threads before assembly to protect components\u003c\/li\u003e\n\u003cli\u003eRecommended impact wrench rating: 800 ft-lbs and above for full performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich pipe sizes and fit scenarios does the 78835 cover?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit covers a broad span of common automotive exhaust diameters, making it useful for OEM replacements, custom exhaust work, and repair of rusted or crushed ends. Each collet increments sizing so you can select the closest fit for even expansion and better sealing when clamping or welding.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCollet size coverage: 1-5\/8\" through 4-1\/4\" diameters\u003c\/li\u003e\n\u003cli\u003eSeven collets included for incremental, precise control\u003c\/li\u003e\n\u003cli\u003eSuitable for passenger vehicles, light trucks, and many custom exhaust pipes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use and maintain the exhaust pipe stretcher safely?\u003c\/h3\u003e\n\n\u003cp\u003eSet the correct collet for the pipe diameter, apply grease to the tool threads, and drive the 28mm bolt head with the recommended impact wrench until the pipe reaches the desired expansion. After use, clean the collets and store them dry; inspect threads and mating surfaces regularly for wear and re-grease before the next job.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSelect collet matching pipe inner diameter, then seat collet in expander\u003c\/li\u003e\n\u003cli\u003eUse 28mm impact socket and impact wrench rated ≥800 ft-lbs; apply grease\u003c\/li\u003e\n\u003cli\u003ePost-use: clean, check for wear, and store in a dry container\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Astro Pneumatic 78835 is aimed at professional shops, exhaust specialists, and advanced DIYers who need a dependable, heavy-duty expander set to streamline exhaust assembly and repair. If you regularly work on exhaust systems—whether replacing factory sections, building custom systems, or restoring damaged pipes—this kit supplies the collet range, durability, and impact compatibility to save time and produce consistent joints.\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 pipe diameters does the 78835 kit expand?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit expands exhaust pipes from 1-5\/8\" up to 4-1\/4\" using seven steel collets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a special wrench to use the expander?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use a 28mm impact socket and an impact wrench rated about 800 ft-lbs or higher for best results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AP Astro Pneumatic Tool Company","offers":[{"title":"Default Title","offer_id":48081492803742,"sku":"B01JBICBJ4","price":189.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/astro-78835-front-packaging-metallic-kit.jpg?v=1785806398","url":"https:\/\/northtrailauto.ca\/products\/ap-astro-pneumatic-tool-company-exhaust-pipe-stretcher-kit-metallic-impact-driven-1-5-8-4-1-4-range","provider":"North Trail Auto","version":"1.0","type":"link"}