{"product_id":"killer-b-el-4-1-holy-header-up-pipe-w-swaintech-coating-egt-bung-2004-2021-subaru-sti-2002-2014-wrx-2004-2013-forester-xt-2004-2009-outback-xt-2004-2009-legacy-gt","title":"Killer B EL 4-1 Holy Header\/Up-Pipe - w\/ SwainTech Coating \u0026 EGT Bung - 2004-2021 Subaru STI \/  2002-2014 WRX, 2004-2013 Forester XT \/ 2004-2009 Outback XT \/ 2004-2009 Legacy GT","description":"\u003ch1\u003e\u003cstrong\u003eKiller B Motorsport 321 Stainless Holy Header\/Up-Pipe\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cdiv class=\"oe_structure\"\u003e\n\u003cp\u003eThe Killer B Motorsport Holy Header was developed using state of the art CAD software \u0026amp; simulations to determine optimal design to increase power as much as possible throughout the rev range. Short as possible primaries with a single secondary decrease header volume significantly, allowing exhaust gas pressure to quickly build. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary\/double secondary designs. A difference that you will immediately notice in throttle\/boost response and the ability to hold more power higher into the revs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Killer B Motorsport","offers":[{"title":"Default Title","offer_id":47772027158628,"sku":"KILHH4-1-EGT-SWAIN","price":2590.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0589\/8413\/6804\/files\/5BHH4-1_5D_20Killer_20B_20Motorsport_20321_20Stainless_20Holy_20Header-Up-Pipe_20_None_20None_fa01c080-6987-4781-8715-c8c45cf82d46.webp?v=1769379984","url":"https:\/\/4thto5thautomotive.com\/products\/killer-b-el-4-1-holy-header-up-pipe-w-swaintech-coating-egt-bung-2004-2021-subaru-sti-2002-2014-wrx-2004-2013-forester-xt-2004-2009-outback-xt-2004-2009-legacy-gt","provider":"4thto5thAutomotive","version":"1.0","type":"link"}