{"product_id":"holy-header-4-1-equal-length-exhaust-manifold","title":"Holy Header 4-1 Equal-Length Exhaust Manifold","description":"The Killer B Motorsport 4-1 Holy Header is a performance exhaust manifold engineered for Subaru EJ models, including the 2002-2014 WRX and 2004-2021 STI. Constructed from thick-walled 321 stainless steel, this header is designed for enhanced durability and resistance to extreme heat from the turbocharger. The collector is made of cast 347 stainless steel, which eliminates welds to reduce flow disruption and create a high-velocity merge.\n\nThe equal-length primary design promotes quick turbo spool-up and improved performance and response across the entire RPM band. Its symmetrical primary design maintains consistent pulse velocities. The mandrel-bent smooth bends and large diameter tubing ensure non-restrictive flow, maximizing the potential of your turbocharger and reducing spool time. Additionally, the SWAIN coating applied to the header helps to reduce under-hood temperatures and protect against heat soak.\n\nFeaturing a V-band up pipe connection, this header facilitates fast and leak-free installation with perfect alignment. The header weighs 17lbs and is compatible with both OEM EJ25 oil pans and the Killer B Motorsport Performance Aluminum Oil Pan. This product is proudly made in the USA.\n\n**Note:** This header may not fit some Forester, Outback, and Legacy models equipped with the OEM oil cooler.","brand":"Killer B","offers":[{"title":"Default Title","offer_id":52662761947448,"sku":"KILHH4-1-SWAIN","price":2445.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687499916.jpg?v=1784320697","url":"https:\/\/store.motormia.co\/products\/holy-header-4-1-equal-length-exhaust-manifold","provider":"MOTORMIA","version":"1.0","type":"link"}