{"product_id":"bmw-b58-gen-3-spool-4-inch-race-downpipe","title":"BMW B58 Gen 3 Spool 4 Inch Race Downpipe","description":"\u003cp\u003eThe Spool race downpipe for the BMW Gen 3 B58 uses a full 4 inch design and a precision-machined stainless V-band transition to get exhaust out of the turbo with as little restriction as possible.\u003c\/p\u003e\u003ch2\u003eWhy you need it\u003c\/h2\u003e\u003cp\u003eMany downpipes neck down near the turbo. This one holds a consistent diameter with a true 3D profile to keep exhaust velocity up, which means sharper throttle response, quicker turbo spool, less lag and a more aggressive exhaust tone. It is built from 304 stainless steel for heat and corrosion resistance.\u003c\/p\u003e\u003ch2\u003eFits\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eBMW models with the Gen 3 B58 engine\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e4 inch design with no taper at the turbo\u003c\/li\u003e\n\u003cli\u003ePrecision CNC-machined stainless V-band transition for a tight seal\u003c\/li\u003e\n\u003cli\u003eTrue 3D profile to maintain exhaust velocity\u003c\/li\u003e\n\u003cli\u003e304 stainless steel construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGood to know\u003c\/h2\u003e\u003cp\u003eFitment on 2025 B58 models is not guaranteed. Check your parts diagram or confirm with your VIN before ordering. A supporting tune is needed to use the extra flow. Intended for off-road and competition use only. Not legal for use on public roads in many areas.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Default Title","offer_id":46564452270165,"sku":"SP-B58G3-DP","price":449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/9769\/8389\/files\/IMG-1856.png?v=1793250686","url":"https:\/\/www.wrenchhaususa.com\/products\/bmw-b58-gen-3-spool-4-inch-race-downpipe","provider":"Wrench Haus","version":"1.0","type":"link"}