{"product_id":"exhaust-header-for-chevrolet-caprice-1971-1987-4-4l-5-0l-5-7l-6-6l","title":"Exhaust Header for Chevrolet Caprice (1971-1987) 4.4L 5.0L 5.7L 6.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Steel Shorty Exhaust Headers for 1971-1987 Chevrolet Caprice (B-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The shorty exhaust header replaces the restrictive cast iron factory exhaust manifolds on the 1971-1987 Chevrolet Caprice to evacuate exhaust gases faster, reduce parasitic backpressure, and optimize cylinder scavenging.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Caprice Exhaust Flow Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust systems on third- and fourth-generation \u003cstrong\u003eB-Body\u003c\/strong\u003e platforms relied on heavy, restrictive log-style cast iron exhaust manifolds. These factory castings feature abrupt 90-degree internal turn radii and unequal runner volumes, creating severe exhaust gas reversion and turbulent backpressure. Over decades of thermal cycling, stock cast iron manifolds become prone to structural warping, cracked webs between runner ports, and stripped flange studs, causing persistent exhaust leaks that degrade low-end volumetric efficiency and rob the engine of power.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for small-block Chevy platforms, these shorty headers feature an 8-2 lightweight configuration crafted from high-grade stainless steel. Mandrel-bent 1-5\/8\" primary tubes ensure uniform wall thickness and laminar exhaust velocity directly out of the cylinder head ports. The primaries merge into smooth 2.5\" collectors to optimize pulse tuning and throttle response. Structural rigidity is maintained with heavy-duty 7\/16\" CNC-machined cylinder head flanges and 3\/8\" outlet flanges, assembled using precision TIG and MIG welding to eliminate flange warpage and guarantee leak-free seal integrity under high thermal loads.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Set Stainless Steel Headers (Left \u0026amp; Right)\u003c\/li\u003e\n  \u003cli\u003e1 Set Mounting Accessories (collector reducers, gaskets, bolts, and washers)\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: solid font-size: min-width:\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;\"\u003e1971-1987 Chevrolet Caprice\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;\"\u003eSmall Block Chevy (SBC Gen I) \/ B-Body\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;\"\u003e110-245 hp \/ 205-385 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;\"\u003eN\/A\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\u003e1971-1987 Chevrolet Caprice with Small Block V8 (4.4L 267 ci, 5.0L 305 ci, 5.7L 350 ci, 6.6L 400 ci) 2WD models only\u003c\/li\u003e\n  \u003cli\u003eCompatible with Chevrolet Gen I Small Block V8 displacements: 262, 265, 267, 283, 302, 305, 307, 327, 350, and 400 ci\u003c\/li\u003e\n  \u003cli\u003eExcludes 4WD\/AWD conversions, Big Block V8 engines (396, 402, 427, 454), and V6 applications\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 B-Body Caprice?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1971-1987 Chevrolet Caprice equipped with the \u003cstrong\u003eSBC Gen I\u003c\/strong\u003e engine. \u003cstrong\u003eWill not fit 4WD\/AWD models, Big Block V8 engines, or V6 configurations.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eAre modifications required during header installation?\u003c\/h4\u003e\n\u003cp\u003eWhile designed for standard 2WD clearances, slight exhaust tubing or hanger adjustments may be required depending on steering shaft, starter, and transmission crossmember clearance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Classic Muscle Caliber\u003c\/h3\u003e\n\u003cp\u003eFreeing up the exhaust path on your small-block Chevy revitalizes classic American V8 muscle, delivering an authoritative exhaust note and immediate power throughout the rev range.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67599155593464,"sku":"DS-E36YGDFO5","price":154.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-header-for-chevrolet-caprice-1971-1987-4-4l-5-0l-5-7l-6-6l-1.jpg?v=1791474937","url":"https:\/\/performancechiptuning.com\/de\/products\/exhaust-header-for-chevrolet-caprice-1971-1987-4-4l-5-0l-5-7l-6-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}