{"product_id":"sbc-engine-swap-headers-for-chevrolet-s-10-blazer-gmc-sonoma-jimmy-1982-2002-4-6l-5-0l-5-4l-5-7l-6-6l","title":"SBC Engine Swap Headers for Chevrolet S-10 Blazer GMC Sonoma Jimmy (1982-2002) 4.6L 5.0L 5.4L 5.7L 6.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow SBC Engine Swap Headers for 1982-2002 Chevrolet,GMC S-10,Blazer,Sonoma,Jimmy (GMT325 \/ GMT330)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The SBC Engine Swap Headers route exhaust gasses around tight frame rail clearances when dropping a \u003cstrong\u003eSmall Block Chevy Gen I V8\u003c\/strong\u003e into the 1982-2002 \u003cstrong\u003eGMT325 \/ GMT330\u003c\/strong\u003e chassis to maximize scavenging and mid-range torque.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet,GMC S-10,Blazer,Sonoma,Jimmy Engine Bay Clearance Bottleneck\u003c\/h3\u003e\n\u003cp\u003eSwapping a \u003cstrong\u003eSmall Block Chevy (SBC)\u003c\/strong\u003e into the compact \u003cstrong\u003eGM S-Series\u003c\/strong\u003e engine bay creates immediate packaging conflicts with factory steering shafts, control arms, and tight chassis rails. Factory cast-iron exhaust manifolds choke exhaust gas velocity, retain extreme thermal energy in the engine bay, and physically collide with the S-10 frame crossmembers during V8 conversions, leaving virtually zero space for proper exhaust evacuation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for V8 swap geometry, these conversion headers feature 1-1\/2-inch mandrel-bent primary tubes crafted from durable \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e to optimize gas velocity and scavenging across the rev band. The tubes transition into high-flow 2-1\/2-inch collectors with rigid, CNC-machined head flanges (1.58\" H x 1.480\" W ports) and precision TIG welds that resist warpage under extreme thermal cycles. Clearanced specifically for tight frame pockets, they bolt directly to traditional straight-plug cylinder heads while preventing heat-soak near steering linkages.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Engine Swap Header Kit (Driver-Side Left \u0026amp; Passenger-Side Right)\u003c\/li\u003e\n  \u003cli\u003eCylinder Head Exhaust Gaskets\u003c\/li\u003e\n  \u003cli\u003eInstallation Hardware and Mounting Bolts\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;\"\u003e1982-2002 Chevrolet,GMC S-10,Blazer,Sonoma,Jimmy\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;\"\u003eChevrolet Small Block Gen I V8 \/ GMT325, GMT330\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;\"\u003e190 hp \/ 250 lb-ft (Stock 4.3L baseline)\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 (Engine Swap Conversion)\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\u003e1982-2002 Chevrolet S-10 Pickup (2WD Only)\u003c\/li\u003e\n  \u003cli\u003e1983-2002 Chevrolet S-10 Blazer \/ Blazer (2WD Only)\u003c\/li\u003e\n  \u003cli\u003e1982-2002 GMC S-15 \/ Sonoma Pickup (2WD Only)\u003c\/li\u003e\n  \u003cli\u003e1983-2002 GMC S-15 Jimmy \/ Jimmy (2WD Only)\u003c\/li\u003e\n  \u003cli\u003eEngine Compatibility: Small Block Chevy 283 (4.6L), 302\/305\/307 (5.0L), 327 (5.4L), 350 (5.7L), 400 (6.6L) with straight-plug heads\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 GMT325 \/ GMT330 S-10,Blazer,Sonoma,Jimmy?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a bolt-on conversion fit for 1982-2002 2WD models swapped with standard straight-plug \u003cstrong\u003eSBC Gen I\u003c\/strong\u003e engines. \u003cstrong\u003eDoes NOT fit 4WD models, angle-plug cylinder heads, or stock 2.2L, 2.5L, 2.8L, and 4.3L factory manifolds. Transmission fitment is limited strictly to TH350 floor-shift automatics.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWill standard spark plug boots clear these primary tubes?\u003c\/h4\u003e\n\u003cp\u003eStraight-plug boots clear standard 1-1\/2-inch primaries, but high-temperature 90-degree boot sets or heat socks are recommended for optimal wire clearance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet,GMC Truck Performance Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-torque street builds and aggressive mini-truck swaps, this \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e header kit provides rigid flange sealing and high-flow scavenging to handle heavy throttle loads without cracking under stress.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67591991066872,"sku":"DS-EPAZ6J5R8","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/sbc-engine-swap-headers-for-chevrolet-s-10-blazer-gmc-sonoma-jimmy-1982-2002-4-6l-5-0l-5-4l-5-7l-6-6l-1.jpg?v=1791395809","url":"https:\/\/performancechiptuning.com\/products\/sbc-engine-swap-headers-for-chevrolet-s-10-blazer-gmc-sonoma-jimmy-1982-2002-4-6l-5-0l-5-4l-5-7l-6-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}