{"product_id":"upgraded-billet-4-piece-idler-kit-for-mercedes-benz-cl-class-s-class-sl-class-g-class-clk-class-maybach-s-class-cl65-cl600-s65-s600-sl65-sl600-g65-clk65-2001-2021-5-5l-5-8l-6-0l","title":"Upgraded Billet 4 Piece Idler Kit for Mercedes Benz CL-Class S-Class SL-Class G-Class CLK-Class Maybach S-Class CL65 CL600 S65 S600 SL65 SL600 G65 CLK65 (2001-2021) 5.5L 5.8L 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003ePrecision CNC Billet 4-Piece Idler Pulley Kit for 2001-2021 Mercedes Benz V12 (W215, W216, W220, W221, W222, R230, R231, W463)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The CNC Billet 4-Piece Serpentine Idler Kit replaces the fragile factory plastic idlers and tensioner pulley on Mercedes-Benz V12 platforms to eliminate catastrophic belt throwing, bearing seizure, and front-drive accessory failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz V12 Idler Pulley Failure Points\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eM137\u003c\/strong\u003e, \u003cstrong\u003eM275\u003c\/strong\u003e, \u003cstrong\u003eM277\u003c\/strong\u003e, and \u003cstrong\u003eM279\u003c\/strong\u003e twin-turbo and naturally aspirated V12 engines generate extreme under-hood thermal loads that rapidly degrade the stock nylon-composite idler pulleys. Under prolonged cyclic heat soak and high rotational shear stress, the OEM injection-molded plastic pulleys suffer polymer embrittlement, grooving, and outer lip fracture. Compounding this, the factory bearings feature standard rubber lip seals that dry out, bake, and weep grease under continuous high-RPM loads. When the bearings dry out, excessive drag induces axial play, cocking the serpentine belt off plane, leading to catastrophic belt shredding, coolant hose punctures, and loss of critical charging and cooling circuits.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to resolve stock accessory drive deficiencies, this four-piece upgrade is precision CNC-machined from solid aircraft-grade billet 6061-T6 aluminum and treated with a mil-spec hard-anodized coating for superior groove wear resistance. Each pulley is pressed with premium Japanese ZZ-rated \u003cstrong\u003eNachi\u003c\/strong\u003e dual-shielded deep-groove ball bearings built to withstand sustained high operational temperatures. Double bearing contact seals isolate synthetic high-temp grease from road grit, while integrated custom billet bearing shields distribute axial clamping forces evenly across the inner races to prevent premature bearing pre-load binding and runout.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4 x CNC Billet Aluminum Idler Pulleys with High-Temp Nachi Bearings\u003c\/li\u003e\n  \u003cli\u003e4 x Custom Billet Aluminum Protective Bearing Shields\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2001-2021 Mercedes Benz CL-Class, S-Class, SL-Class, G-Class, CLK-Class, Maybach S-Class\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eM137, M275, M277, M279 \/ W215, W216, W220, W221, W222, R230, R231, W463\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e362–621 hp \/ 391–738 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1132020419, A1132020419, A 113 202 04 19\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001-2021 Mercedes Benz CL-Class CL600 \/ CL65 AMG V12\u003c\/li\u003e\n  \u003cli\u003e2001-2021 Mercedes Benz S-Class S600 \/ S65 AMG V12\u003c\/li\u003e\n  \u003cli\u003e2001-2021 Mercedes Benz SL-Class SL600 \/ SL65 AMG V12 (incl. Black Series where applicable)\u003c\/li\u003e\n  \u003cli\u003e2001-2021 Mercedes Benz G-Class G65 AMG V12\u003c\/li\u003e\n  \u003cli\u003e2001-2021 Mercedes Benz CLK-Class CLK65 AMG Black Series V12\u003c\/li\u003e\n  \u003cli\u003eMaybach S-Class \/ related Maybach V12 trims (57 \/ S650 \/ G650 style applications per kit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the W220, W221, and W222 CL-Class, S-Class, SL-Class, G-Class, CLK-Class, Maybach S-Class?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2001-2021 Mercedes Benz CL-Class, S-Class, SL-Class, G-Class, CLK-Class, Maybach S-Class equipped with the \u003cstrong\u003eM137\u003c\/strong\u003e, \u003cstrong\u003eM275\u003c\/strong\u003e, \u003cstrong\u003eM277\u003c\/strong\u003e, or \u003cstrong\u003eM279\u003c\/strong\u003e engine. \u003cstrong\u003eThis kit does not fit V6 (M112\/M272) or V8 (M113\/M273\/M156\/M157) engine variants.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eAre modifications required to install this billet idler set?\u003c\/h4\u003e\n\u003cp\u003eNo modifications are necessary; these billet pulleys utilize factory mounting points and hardware for a direct bolt-on installation, though professional torque sequencing is recommended.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEuropean luxury and performance flagships demand absolute front-drive reliability to protect delicate sensory electronics, complex cooling loops, and high-strung valvetrains. Upgrading to billet aluminum pulley architecture ensures precise belt alignment, zero runout, and complete immunity to the thermal cycling that leaves lesser components stranded on the roadside.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67558790758648,"sku":"DS-E7N8N7KA5","price":500.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/upgraded-billet-4-piece-idler-kit-for-mercedes-benz-cl-class-s-class-sl-class-g-class-clk-class-maybach-s-class-cl65-cl600-s65-s600-sl65-sl600-g65-clk65-2001-2021-5-5l-5-8l-6-0l-1.jpg?v=1790925227","url":"https:\/\/performancechiptuning.com\/es\/products\/upgraded-billet-4-piece-idler-kit-for-mercedes-benz-cl-class-s-class-sl-class-g-class-clk-class-maybach-s-class-cl65-cl600-s65-s600-sl65-sl600-g65-clk65-2001-2021-5-5l-5-8l-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}