{"product_id":"ej-series-4-1-exhaust-header","title":"EJ Series 4-1 Exhaust Header","description":"The Killerbee Equal Length 4-1 Holy Header VE MAX is engineered for optimal high power and RPM efficiency, developed with advanced CAD, simulations, and testing. This header features a 4-1 symmetrical design that maintains consistent and high velocity exhaust gas flow as RPMs increase. The primaries are short and equal in length, contributing to improved transient response, and all primaries share similar tube lengths and bend geometry for balanced performance.\n\nThe Holy Header VE-Max incorporates a high velocity merge collector that transitions into a stepped 2.5\" secondary, designed for very high flow applications. The cast collector, made from 347 (321) stainless steel, is stronger than tubing and offers a superior high velocity merge design compared to fabricated tube collectors. Large radius mandrel bends ensure smooth, non-restrictive flow through the exhaust system.\n\nConstructed from thick-walled 321 stainless steel, which is alloyed with titanium for higher strength and toughness at elevated temperatures, this header is built for long life. Killer B Motorsport ensures quality with USA manufacturing; each header setup is inspected, assembled, and pressure tested before shipping to guarantee a leak-free setup.\n\nThis header is compatible with OEM EJ25 oil pans, as well as the Killer B Motorsport Performance Aluminum Oil Pan. It fits all WRX \u0026amp; STi EJ Series Engines. Killer B Motorsport does not warranty wrapped headers.","brand":"Killerbee","offers":[{"title":"Default Title","offer_id":52686484275512,"sku":"KBM-HH-2BOLT","price":1689.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/657804954.webp?v=1784874296","url":"https:\/\/store.motormia.co\/products\/ej-series-4-1-exhaust-header","provider":"MOTORMIA","version":"1.0","type":"link"}