{"product_id":"header-manifold-for-toyota-pickup-truck-4runner-1990-1995-2-4l-engine","title":"Header Manifold for Toyota Pickup Truck 4Runner 2WD (1990-1995) 2.4L Engine","description":"\u003ch2\u003eHigh-Flow Stainless Steel Header for 1990-1995 Toyota 4Runner \u0026amp; Pickup (22R-E\/N120)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat It Does:\u003c\/strong\u003e Replaces the restrictive, crack-prone factory cast-iron exhaust manifold with a high-flow stainless steel header to improve exhaust scavenging and reduce engine backpressure.\u003c\/p\u003e\n\u003ch3\u003eThe Stock 22R-E Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust manifold on the 1990-1995 Toyota 2.4L (22R-E) is a heavy cast-iron component designed for production speed rather than flow efficiency. Over decades of operation, these cast units are notorious for developing hairline fractures due to extreme thermal fatigue and heat-cycling. Internally, the OEM manifold features rough casting flash and sharp 90-degree bends that create significant turbulence. This turbulence creates a 'chokepoint' effect, trapping heat in the cylinder head and forcing the engine to work harder during the exhaust stroke, which ultimately reduces overall efficiency and throttle response.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis header is engineered to rectify the 22R-E’s breathing limitations through the use of mandrel-bent tubing and high-grade polished stainless steel. Unlike standard crush-bending, mandrel bending maintains a constant 1.50\" primary diameter throughout every curve, ensuring laminar exhaust flow and maximizing gas velocity. The CNC-machined flanges provide an ultra-flat mating surface that eliminates the common 'exhaust tick' leak found in warped stock manifolds. Constructed with a combination of TIG and MIG welding for structural integrity, this header features a 2.25\" OD outlet to facilitate rapid gas evacuation, effectively lowering EGTs (Exhaust Gas Temperatures) and improving the volumetric efficiency of the engine.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\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;\"\u003e1990-1995 Toyota 4Runner, Pickup (Hilux)\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;\"\u003e22R-E (2.4L) \/ N80, N90, N100, N110, N120, N130\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;\"\u003e116 hp \/ 140 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eToyota 4Runner (1990-1995) 2.4L 2WD Only\u003c\/li\u003e\n\u003cli\u003eToyota Pickup (1990-1995) 2.4L 2WD Only\u003c\/li\u003e\n\u003cli\u003eTrim: 2.4L Engine Only\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003eNote: Fits 2WD models exclusively\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Toyota Durability Standard\u003c\/h3\u003e\n\u003cp\u003eThe Toyota 22R-E is a legendary powerplant known for its bulletproof reliability. This header upgrade is built to match that caliber of engineering, offering the durability needed for heavy-duty towing and high-mileage utility. By replacing the brittle factory iron with high-quality stainless steel, you ensure your exhaust system can handle the rigors of daily work without the risk of manifold failure or power-robbing leaks.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47989471281400,"sku":"DS-ER9DXH3E7","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/header-manifold-for-toyota-pickup-truck-4runner-1990-1995-2-4l-engine-1.webp?v=1771104264","url":"https:\/\/performancechiptuning.com\/products\/header-manifold-for-toyota-pickup-truck-4runner-1990-1995-2-4l-engine","provider":"Performance Chip Tuning","version":"1.0","type":"link"}