{"product_id":"4-downpipe-gti-gli-mk7-mk7-5-big-bore-400-cell-gesi","title":"4\" Downpipe — GTI \/ GLI (Mk7\/Mk7.5) | Big-Bore 400-Cell GESI GEN2","description":"\u003cp\u003eThe \u003cstrong\u003e4\" Downpipe\u003c\/strong\u003e is our maximum-flow, big-bore downpipe for the Mk7\/Mk7.5 GTI and Jetta GLI — built for higher-output and hybrid-turbo setups that want the most out of the exhaust. Fully TIG-welded, back-purged 304 stainless with a high-flow \u003cstrong\u003e400-cell GESI GEN2\u003c\/strong\u003e catalyst in a 4.5\" housing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOriginally a Baun Performance design (GTI Jake)\u003c\/strong\u003e — this is the same big-bore downpipe formerly built by Baun Performance, now hand-built by Brockett Built.\u003c\/p\u003e\n\n\u003ch3\u003ePairing with a cat-back? Add a midpipe.\u003c\/h3\u003e\n\u003cp\u003eDo you have a specific cat-back you're pairing with? Our resonated midpipe is built to fit \u003cstrong\u003eboth this downpipe and your cat-back\u003c\/strong\u003e — select the \u003cstrong\u003e3.5″\u003c\/strong\u003e diameter to match this 4″ downpipe, choose your cat-back, and we size it to bolt right in. \u003ca href=\"\/products\/borla-cts-apr-magnaflow-fitment-resonated-midpipe-gti-gli\"\u003eAdd the matching resonated midpipe →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVW Mk7 \u0026amp; Mk7.5 GTI\u003c\/strong\u003e — 2015–2021 (front-wheel drive)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVW Jetta GLI (A7)\u003c\/strong\u003e — 2019–2025 (front-wheel drive)\u003c\/li\u003e\n\u003cli\u003eEngine: EA888 Gen 3 2.0T · best suited to stage 2+ \/ hybrid-turbo builds\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eAWD cars (Golf R \/ Audi S3 \/ A3 \/ Alltrack) use our dedicated AWD 4\" downpipe — see that listing.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 4\" upper section into a 4.5\" catalyst housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalytic converter:\u003c\/strong\u003e 400-cell GESI GEN2 high-flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e TIG-welded, Argon back-purged, hand-built to order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow:\u003c\/strong\u003e Independently bench-tested at approximately 396 CFM (downpipe alone) — roughly 143% more airflow than the stock downpipe\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eBuilt to order. Emissions compliance varies by region — contact us to confirm the right configuration for your build. Allow for fabrication lead time.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePart of the \u003ca href=\"\/pages\/gti-jake-baun-performance\"\u003eGTI Jake \/ Baun Performance\u003c\/a\u003e lineup, now designed and built by Brockett Built.\u003c\/em\u003e\u003c\/p\u003e","brand":"Brockett Built","offers":[{"title":"Default Title","offer_id":45118254874832,"sku":"BB-DP-4-GTI","price":2400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/0818\/6832\/files\/F69C5942-F27C-4163-8696-8E491C930065.jpg?v=1787859627","url":"https:\/\/brockettbuilt.com\/products\/4-downpipe-gti-gli-mk7-mk7-5-big-bore-400-cell-gesi","provider":"Brockett Built","version":"1.0","type":"link"}