{"product_id":"bc3313-toyota-1jz-exhaust-valves-31mm-1mm-set-12","title":"BC3313 - Toyota 1JZ Exhaust Valves (31mm \/ +1mm) - set\/12","description":"\u003ch1 data-section-id=\"t1gyw4\" data-start=\"0\" data-end=\"87\"\u003eBrian Crower Oversized Stainless Steel Exhaust Valves for Toyota 1JZ (+1 mm) (BC3313)\u003c\/h1\u003e\n\u003cp data-start=\"89\" data-end=\"476\"\u003eWhen building a high-performance 1JZ engine, increasing exhaust flow is essential for maximizing turbo efficiency, reducing backpressure, and supporting higher horsepower levels. The Brian Crower Oversized Stainless Steel Exhaust Valves are engineered to provide exceptional durability, reduced valvetrain mass, and enhanced exhaust flow for demanding street and motorsport applications.\u003c\/p\u003e\n\u003cp data-start=\"478\" data-end=\"902\"\u003eFeaturing a +1 mm oversized head diameter, these valves significantly improve exhaust gas evacuation compared to standard-size valves, making them ideal for ported cylinder heads and fully developed high-horsepower engine builds. Manufactured from premium heat-resistant stainless steel, each valve utilizes a one-piece construction with a friction-welded Stellite tip for superior wear resistance and long-term reliability.\u003c\/p\u003e\n\u003cp data-start=\"904\" data-end=\"1262\"\u003eThe undercut stem design reduces overall valve weight while improving exhaust flow from the combustion chamber, supporting extended RPM capability and greater engine efficiency. Fully machined and swirl-polished beneath the valve head, these valves deliver the precision and quality required for serious naturally aspirated and turbocharged 1JZ applications.\u003c\/p\u003e\n\u003cp data-start=\"1264\" data-end=\"1446\"\u003eSupplied as a complete set of 12, these oversized exhaust valves are an ideal upgrade when paired with aftermarket camshafts, valve springs, and professionally ported cylinder heads.\u003c\/p\u003e\n\u003cp data-start=\"1448\" data-end=\"1629\"\u003eTrusted by professional engine builders and motorsport teams worldwide, Brian Crower valves are a proven upgrade for unlocking the full potential of Toyota’s legendary 1JZ platform.\u003c\/p\u003e\n\u003cp data-start=\"1631\" data-end=\"1712\"\u003eCarefully selected for builders who demand proven performance without compromise.\u003c\/p\u003e\n\u003chr data-start=\"1714\" data-end=\"1717\"\u003e\n\u003ch2 data-section-id=\"vpcjk0\" data-start=\"1719\" data-end=\"1754\"\u003eWhy Upgrade Your Exhaust Valves?\u003c\/h2\u003e\n\u003cp data-start=\"1756\" data-end=\"1791\"\u003eCompared to factory exhaust valves:\u003c\/p\u003e\n\u003cp data-start=\"1793\" data-end=\"2091\"\u003e✔ +1 mm oversized head increases exhaust flow capacity\u003cbr data-start=\"1847\" data-end=\"1850\"\u003e✔ Premium stainless steel construction for superior heat resistance\u003cbr data-start=\"1917\" data-end=\"1920\"\u003e✔ Friction-welded Stellite tips for excellent wear durability\u003cbr data-start=\"1981\" data-end=\"1984\"\u003e✔ Undercut stems reduce weight and improve gas flow\u003cbr data-start=\"2035\" data-end=\"2038\"\u003e✔ Designed for high-boost and high-RPM applications\u003c\/p\u003e\n\u003chr data-start=\"2093\" data-end=\"2096\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"2098\" data-end=\"2113\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"2115\" data-end=\"2371\"\u003e✔ Genuine Brian Crower oversized stainless steel exhaust valve set\u003cbr data-start=\"2181\" data-end=\"2184\"\u003e✔ One-piece valve construction\u003cbr data-start=\"2214\" data-end=\"2217\"\u003e✔ Friction-welded Stellite tips\u003cbr data-start=\"2248\" data-end=\"2251\"\u003e✔ Fully machined and swirl-polished under the valve head\u003cbr data-start=\"2307\" data-end=\"2310\"\u003e✔ Dished exhaust valve design\u003cbr data-start=\"2339\" data-end=\"2342\"\u003e✔ Complete set of 12 valves\u003c\/p\u003e\n\u003chr data-start=\"2373\" data-end=\"2376\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"2378\" data-end=\"2405\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2407\" data-end=\"2767\"\u003e✔ Brand: Brian Crower\u003cbr data-start=\"2428\" data-end=\"2431\"\u003e✔ Part Number: BC3313\u003cbr data-start=\"2452\" data-end=\"2455\"\u003e✔ Product Type: Oversized Exhaust Valve Set\u003cbr data-start=\"2498\" data-end=\"2501\"\u003e✔ Valve Material: Heat-Resistant Stainless Steel\u003cbr data-start=\"2549\" data-end=\"2552\"\u003e✔ Valve Type: Exhaust \/ Dished\u003cbr data-start=\"2582\" data-end=\"2585\"\u003e✔ Valve Size: +1.0 mm Oversized\u003cbr data-start=\"2616\" data-end=\"2619\"\u003e✔ Head Diameter: 31.0 mm\u003cbr data-start=\"2643\" data-end=\"2646\"\u003e✔ Stem Diameter: 5.97 mm\u003cbr data-start=\"2670\" data-end=\"2673\"\u003e✔ Overall Length: 98.1 mm\u003cbr data-start=\"2698\" data-end=\"2701\"\u003e✔ Quantity: Set of 12 Valves\u003cbr data-start=\"2729\" data-end=\"2732\"\u003e✔ Engine Family: Toyota JZ-Series\u003c\/p\u003e\n\u003chr data-start=\"2769\" data-end=\"2772\"\u003e\n\u003ch2 data-section-id=\"15vxm9q\" data-start=\"2774\" data-end=\"2795\"\u003eCompatible Engines\u003c\/h2\u003e\n\u003cp data-start=\"2797\" data-end=\"2819\"\u003e✔ 1JZ-GE\u003cbr data-start=\"2805\" data-end=\"2808\"\u003e✔ 1JZ-GTE\u003c\/p\u003e\n\u003chr data-start=\"2821\" data-end=\"2824\"\u003e\n\u003ch2 data-section-id=\"icfs9j\" data-start=\"2826\" data-end=\"2837\"\u003eShipping\u003c\/h2\u003e\n\u003cp data-start=\"2839\" data-end=\"2923\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e🇪🇺 EU Delivery: 5–10 Business Days\u003cbr data-start=\"2875\" data-end=\"2878\"\u003e🌍 International Delivery: 7–21 Business Days\u003c\/p\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":57690369786204,"sku":null,"price":322.29,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1019\/6300\/6300\/files\/ChatGPTImageMay19_2026_09_17_31PM.png?v=1779214663","url":"https:\/\/jzsignature.com\/products\/bc3313-toyota-1jz-exhaust-valves-31mm-1mm-set-12","provider":"JZ Signature","version":"1.0","type":"link"}