{"product_id":"exhaust-header-for-dodge-w100-w150-plymouth-trailduster-1967-1978-6-3l-6-6l-7-2l","title":"Exhaust Header for Dodge W100 W150 Plymouth Trailduster (1967-1978) 6.3L 6.6L 7.2L","description":"\u003ch2\u003eHigh-Flow Stainless Exhaust Header for 1967-1978 Dodge, Plymouth W100, W150, Trailduster\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The performance exhaust header replaces the restrictive factory cast-iron exhaust manifolds on the 1967-1978 Dodge W100, W150, and Plymouth Trailduster to reduce exhaust backpressure, optimize scavenging, and improve engine operating efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Dodge, Plymouth W100, W150, Trailduster Exhaust Manifold Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory big-block exhaust manifolds fitted to 1967-1978 \u003cstrong\u003eChrysler B\/RB engine\u003c\/strong\u003e platforms suffer from extremely tight casting radii, asymmetric runner lengths, and restrictive collector necks. Over decades of heat cycling, stock cast-iron units are notoriously prone to cracking, warpage across the cylinder head mating surfaces, and sheared mounting studs. Internally, turbulence and excessive backpressure choke exhaust gas velocity, causing elevated cylinder head temperatures and scavenging reversion that directly compromises mid-range torque.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement exhaust header utilizes premium stainless steel construction engineered to withstand extreme thermal cycles without structural failure. Smooth, mandrel-bent primary tubes maintain uniform cross-sectional diameter to preserve laminar exhaust gas flow and accelerate cylinder evacuation. Precision TIG-welded, heavy-duty flanges resist thermal warping and eliminate blowouts at the cylinder head interface. Merging into a low-restriction collector, this bolt-on system unlocks exhaust velocity, reduces parasitic pumping losses, and provides adequate clearance around steering shafts, leaf springs, and 4WD transfer case linkages on the vintage \u003cstrong\u003eD-Series \/ W-Series\u003c\/strong\u003e chassis.\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; margin-bottom: 20px;\"\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;\"\u003e1967-1978 Dodge W100, W150, Plymouth Trailduster\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;\"\u003eB\/RB Big Block (383 6.3L, 400 6.6L, 440 7.2L) \/ Dodge D\/W-Series\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;\"\u003e175-375 hp \/ 300-480 lb-ft (depending on year\/emissions)\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 (Aftermarket Performance Replacement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1967-1978 Dodge W100 6.3L 383ci, 6.6L 400ci, 7.2L 440ci Big Block V8\u003c\/li\u003e\n  \u003cli\u003e1975-1978 Dodge W150 6.6L 400ci, 7.2L 440ci Big Block V8\u003c\/li\u003e\n  \u003cli\u003e1974-1978 Plymouth Trailduster 6.6L 400ci, 7.2L 440ci Big Block V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the D\/W-Series W100, W150, Trailduster?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1967-1978 Dodge and Plymouth W100, W150, and Trailduster models equipped with the \u003cstrong\u003eChrysler B\/RB\u003c\/strong\u003e V8 engine series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the header bolts require retorquing after installation?\u003c\/strong\u003e\u003cbr\u003e Yes, all header flange fasteners should be re-torqued after an initial thermal cycle to ensure gasket retention and prevent exhaust leaks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Dodge, Plymouth Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned for heavy towing, sustained hauling, and severe-duty four-wheel-drive demands, this stainless steel header eliminates cracked manifold failures while providing the low-end pulling torque essential for vintage Mopar trucks.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50607436333304,"sku":"DS-EO5E2YRD5","price":343.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-header-for-dodge-w100-w150-plymouth-trailduster-1967-1978-6-3l-6-6l-7-2l-1.jpg?v=1790091260","url":"https:\/\/performancechiptuning.com\/products\/exhaust-header-for-dodge-w100-w150-plymouth-trailduster-1967-1978-6-3l-6-6l-7-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}