{"product_id":"bbtv-4203-engine-piston-ring","title":"BBTV 4203 Engine Piston Ring","description":"\u003ch2\u003eEngine piston ring for classic Ford applications\u003c\/h2\u003e\u003cp\u003eEngine piston ring 4203 is a standard-size ring set component for 3.780-inch \/ 96.00 mm bores. It is built for a 4-cylinder engine and uses a phosphate-treated top ring for added surface protection during break-in and service.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard oversize specification for 3.780-inch \/ 96.00 mm bores\u003c\/li\u003e\n\u003cli\u003ePhosphate-treated top ring surface for improved initial wear resistance\u003c\/li\u003e\n\u003cli\u003eGrey iron top and second ring construction\u003c\/li\u003e\n\u003cli\u003eSteel rail and stainless expander oil ring design\u003c\/li\u003e\n\u003cli\u003eFits a wide range of Ford and Mercury applications from the 1970s and 1980s\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed description\u003c\/h2\u003e\u003cp\u003ePart number 4203 is an engine piston ring set component used in compatible Ford and Mercury 4-cylinder engines with a standard 3.780-inch bore. The ring package combines grey iron compression rings with a steel rail and stainless expander oil ring, while the phosphate coating on the top ring and second ring supports controlled break-in characteristics. This part number 4203 is listed for applications including Ford Mustang, Ford Ranger, Ford Pinto, Mercury Capri, and Mercury Bobcat, making it a fitment-based choice for older domestic engine rebuilds.\u003c\/p\u003e\u003ch2\u003eWhat it is used for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestoring cylinder sealing in worn engine bores\u003c\/li\u003e\n\u003cli\u003eReducing oil control issues caused by tired ring packs\u003c\/li\u003e\n\u003cli\u003eAddressing compression loss during engine rebuilds\u003c\/li\u003e\n\u003cli\u003eReplacing worn piston rings in standard-bore 4-cylinder engines\u003c\/li\u003e\n\u003cli\u003eSupporting proper combustion chamber pressure retention\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes and tips\u003c\/h2\u003e\u003cp\u003eVerify bore size, groove dimensions, and ring end gap before installation. Confirm that the engine matches the listed 3.780-inch \/ 96.00 mm standard-bore specification and review the fitment notes for each application. Professional engine assembly practices are recommended for ring installation and final clearance checks.\u003c\/p\u003e\u003ch2\u003eQuality assurance\u003c\/h2\u003e\u003cp\u003eFitment is listed for 1974-1991 Ford and Mercury applications, including Mustang, Ranger, Aerostar, LTD, Capri, Marquis, Fairmont, Zephyr, Granada, Cougar, Pinto, Bobcat, and Mustang II. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 435P, 3035X) for the same application.\u003c\/p\u003e","brand":"BBTV","offers":[{"title":"Default Title","offer_id":53669307482293,"sku":"BBTV-4203","price":27.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/HA_4203_Fro.jpg?v=1793687073","url":"https:\/\/www.partcatalog.com\/products\/bbtv-4203-engine-piston-ring","provider":"PartCatalog","version":"1.0","type":"link"}