{"product_id":"exhaust-headers-for-chevrolet-corvette-1963-1982-305-327-350","title":"Exhaust Headers for Chevrolet Corvette (1963-1982) 305 327 350 Engines","description":"\u003ch2\u003eHigh-Flow Long-Tube Exhaust Headers for 1963-1982 Chevrolet Corvette (SBC C2\/C3)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplaces restrictive factory cast iron manifolds with a high-velocity long-tube design to maximize exhaust scavenging and reduce backpressure on Small Block Chevy engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Corvette Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eOriginal equipment cast iron manifolds on C2 and C3 Corvettes were designed for space efficiency rather than gas dynamics. These \"log\" style manifolds force exhaust pulses from multiple cylinders into a shared chamber, creating significant turbulence and backpressure that hinders the engine's volumetric efficiency. Additionally, the heavy cast iron construction acts as a massive heat sink, retaining thermal energy long after operation, which contributes to under-hood heat soak and can lead to premature failure of spark plug wires and nearby rubber components. In high-performance SBC builds, this restriction prevents the camshaft from reaching its full potential, effectively choking the engine at mid-to-high RPM ranges.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese full-length headers are engineered from 16-gauge T304 stainless steel, providing a significant upgrade in both durability and thermal dissipation. The 1-5\/8\" primaries are mandrel-bent to maintain a constant internal diameter, ensuring smooth laminar flow from the exhaust port to the collector. The 4-into-1 design culminates in a 3\" collector, utilizing scavenging physics to pull spent gases out of the combustion chamber more effectively than stock. To ensure a permanent, leak-free seal, the headers feature CNC-machined 5\/16\" thick flanges and O-ring port seals that resist warping under extreme heat cycles. The polished finish provides a professional aesthetic while resisting the corrosion typical of mild steel alternatives.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1963-1982 Chevrolet Corvette\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eSmall Block Chevy (SBC) \/ C2 \u0026amp; C3\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e165-375 hp \/ 250-360 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUL179P29903K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1963-1967 Chevrolet Corvette (C2 Chassis)\u003c\/li\u003e\n  \u003cli\u003e1968-1982 Chevrolet Corvette (C3 Chassis)\u003c\/li\u003e\n  \u003cli\u003eEngine Fitment: Small Block Chevy 262, 305, 327, 350, 400ci V8\u003c\/li\u003e\n  \u003cli\u003eNote: May not fit specific double-hump 327 cylinder heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Muscle Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned for the classic American small block, these headers prioritize high-RPM breathability and a distinct, aggressive exhaust note. This is a critical upgrade for Corvette owners seeking to improve throttle response and horsepower while maintaining the mechanical integrity of a vintage C2 or C3 platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47999224086776,"sku":"DS-EAG7IUUH1","price":254.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-for-chevrolet-corvette-1963-1982-305-327-350-1.webp?v=1771368080","url":"https:\/\/performancechiptuning.com\/products\/exhaust-headers-for-chevrolet-corvette-1963-1982-305-327-350","provider":"Performance Chip Tuning","version":"1.0","type":"link"}