{"title":"Perfect Circle","description":"","products":[{"product_id":"perfect-circle-piston-ring-set-4-055-moly-3-0-2-0-3-0mm","title":"Perfect Circle Diesel Piston Ring Set 4.055 Bore 3.0 x 2.0 x 3.0mm — Heavy Duty Engine Repair","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Perfect Circle\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003ePerfect Circle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Perfect Circle lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHeavy-Duty Diesel Piston Ring Performance\u003c\/h2\u003e\u003cp\u003eMaintain peak efficiency in your diesel engine with this professional-grade Perfect Circle Piston Ring Set. Specifically designed for a 4.055-inch bore, these rings are crafted from high-strength ductile iron, providing the necessary durability to withstand the high compression and thermal stresses inherent in diesel applications. The plasma moly coating ensures superior lubrication and wear resistance, significantly extending the service life of your engine components.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 4.055 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Thickness:\u003c\/strong\u003e 3.0 x 2.0 x 3.0 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Ductile Iron with Plasma Moly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 8-Cylinder Diesel Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Standard tension, drop-in fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese rings are engineered to provide an optimal seal, minimizing oil consumption and maximizing power delivery. The ductile iron construction offers better fatigue resistance compared to standard cast iron, making this set an ideal choice for heavy-duty towing, commercial use, or high-torque diesel performance builds. By utilizing advanced MAHLE Original manufacturing processes, this kit guarantees precise fitment and consistent performance across all cylinders. Whether you are completing a full engine overhaul or addressing specific compression issues, these rings provide the reliability required for demanding diesel environments. Trust your engine build to the experts and find all your necessary components at GGCRACING.\n\u003c\/p\u003e\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Perfect Circle products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/perfect-circle-piston-ring-set-4-030-moly-5-64-5-64-3-16\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerfect Circle Piston Ring Set — 4.030 Bore Plasma Moly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/perfect-circle-piston-ring-set-4-040-moly-5-64-5-64-3-16\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerfect Circle Piston Ring Set — 4.040 Bore Plasma Moly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/perfect-circle-piston-ring-set-4-155-moly-5-64-5-64-3-16\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerfect Circle Piston Ring Set 4.155 Bore Moly 5\/64 x 5\/64 x 3\/16 — High Performance Engin\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Perfect Circle Diesel Piston Ring Set 4.055 Bore 3.0 x 2.0 x 3.0mm \\u2014 Heavy Duty Engine Repair\",\"description\":\"Enhance your diesel engine performance with Perfect Circle 4.055 bore ductile iron rings. Durable, plasma moly coated for heavy-duty use. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Perfect Circle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Perfect Circle Diesel Piston Ring Set 4.055 Bore 3.0 x 2.0 x 3.0mm \\u2014 Heavy Duty ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. See manufacturer documentation for torque specs and procedures.\"}}]}\u003c\/script\u003e","brand":"Perfect Circle","offers":[{"title":"Default Title","offer_id":41444512956500,"sku":"BCZS_41909","price":234.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/M7741909.jpg?v=1721543686"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/collections\/download_1acf3d89-ed08-4986-bdaf-0c16c43e06a9.png?v=1717301821","url":"https:\/\/ggcracing.com\/collections\/perfect-circle\/on-sale.oembed","provider":"GGCRACING INC","version":"1.0","type":"link"}