{"product_id":"mas-efi-tbi-distributor-for-gm-5-0l-5-7l-7-4l-engines-red-cap-oem-fit-110-3952","title":"MAS EFI\/TBI Distributor for GM 5.0L 5.7L 7.4L Engines — Red Cap, OEM-Fit (110-3952)","description":"\u003cp\u003e\u003cstrong\u003eThe MAS Small Block \/ Big Block EFI TBI Distributor is a direct-fit replacement distributor engineered to restore ignition timing and reliable spark for 1987–1997 GM 5.0L, 5.7L and 7.4L engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis MAS distributor is built as a plug-and-play OEM-style unit for a wide range of GM vehicles including Chevy C\/K trucks, Camaro, Van, and Cadillac models from the late ’80s to mid ’90s. It replaces worn or failed original distributors with improved materials and precision components: a chromoly steel gear, heat-treated 20CR steel gearing, and compatibility with common OEM part numbers. The result is dependable fitment, consistent timing, and parity with factory mechanical and electrical interfaces for EFI and TBI systems.\u003c\/p\u003e\n\n\u003ch3\u003eWill this distributor fit my 1987–1997 GM engine?\u003c\/h3\u003e\n\u003cp\u003eYes — MAS designed this distributor to match bolt pattern, electrical connector, and drive geometry for many GM V8s from that era. Confirm vehicle year, engine displacement, and OEM part references before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 5.0L (305), 5.7L (350) and 7.4L (454) engines.\u003c\/li\u003e\n  \u003cli\u003eVehicle examples: Chevy C\/K trucks, Camaro, Caprice, El Camino, Blazer, Cadillac Brougham, and commercial chassis models.\u003c\/li\u003e\n  \u003cli\u003eCross-references include OEM and aftermarket numbers such as 110-3952, MSD 8366, Delphi CZ20001, Dorman 690-903.\u003c\/li\u003e\n  \u003cli\u003eDesigned for EFI and TBI ignition systems used in 1987–1997 GM applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the MAS distributor improve durability over a worn original?\u003c\/h3\u003e\n\u003cp\u003eMAS uses upgraded materials and precision production to reduce wear and extend service life versus aging factory units. Improved gear metallurgy and assembly tolerances help preserve timing integrity and minimize mechanical slop.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChromoly steel main gear for high-strength drive engagement.\u003c\/li\u003e\n  \u003cli\u003e20CR heat-treated gears for wear resistance under load.\u003c\/li\u003e\n  \u003cli\u003eFactory-style electrical interfaces to avoid rewiring or splicing.\u003c\/li\u003e\n  \u003cli\u003eBuilt to meet OEM form, fit and function with tighter quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat do I need to know for installation and compatibility?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone familiar with distributor service: set the engine to TDC, align the rotor and install the unit, then fine-tune timing as required. No modification should be needed if the replacement matches your original distributor’s part references and engine series.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow factory timing procedure for initial setup and final adjustment.\u003c\/li\u003e\n  \u003cli\u003eVerify cap orientation and plug wire order to avoid misfires.\u003c\/li\u003e\n  \u003cli\u003eConfirm electrical connector matches stock harness before securing the distributor.\u003c\/li\u003e\n  \u003cli\u003eOne-year limited replacement warranty covers manufacturing defects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich part numbers and references match this MAS distributor?\u003c\/h3\u003e\n\u003cp\u003eThis distributor cross-references many common aftermarket and OEM numbers, simplifying parts lookup and ensuring you get the correct replacement without guessing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMAS part corresponds to OEM 110-3952 and similar references.\u003c\/li\u003e\n  \u003cli\u003eAlso cross-listed with MSD 8366, Delphi CZ20001, Dorman 690-903, Accel 60109\/59107.\u003c\/li\u003e\n  \u003cli\u003eWorks as a drop-in alternative to many HEI-style and EFI\/TBI distributors used in late ’80s–’90s GM V8s.\u003c\/li\u003e\n  \u003cli\u003eProduct code often cited as HEI652R with distinctive red cap.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This MAS distributor is aimed at DIY mechanics, restoration shops, and owners of late-’80s to mid-’90s GM vehicles seeking a reliable OEM-form replacement. It’s suitable if you need a direct-fit upgrade for an aging or failed distributor on 305, 350, or 454 V8 engines and want improved gear material and a one-year replacement warranty. Always check fitment against your vehicle’s year, engine size, and original distributor part number before ordering.\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: Does this MAS distributor fit a 1990 Chevy 350 V8?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s compatible with 5.7L (350) engines from that era when the OEM part number and distributor style match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What warranty comes with the MAS distributor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The distributor includes a one-year replacement-only warranty covering manufacturing defects.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MAS","offers":[{"title":"Default Title","offer_id":48084041957534,"sku":"B074MLL7GK","price":73.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mas-red-cap-front-view.jpg?v=1785844520","url":"https:\/\/northtrailauto.ca\/products\/mas-efi-tbi-distributor-for-gm-5-0l-5-7l-7-4l-engines-red-cap-oem-fit-110-3952","provider":"North Trail Auto","version":"1.0","type":"link"}