{"product_id":"4-5-inch-114mm-b58-gen1-racing-downpipe-for-bmw-f20-f30-f32-g30-140i-340i-440i-540i-ss304-exhaust-pipe","title":"4.5 Inch 114mm B58 Gen1 Racing Downpipe for BMW F20 F30 F32 G30 140i 340i 440i 540i SS304 Exhaust Pipe","description":"\u003cdiv\u003e\n\u003ch3\u003eDESCRIPTION\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaximize Turbo Exhaust Flow \u0026amp; Speed Up Turbo Spool for BMW B58 Gen1 3.0T Models 2016-2019.\u003c\/strong\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nThis performance front downpipe is built from thick mandrel bent mirror polished T304 stainless steel, equipped with a massive 114mm \/ 4.5 inch oversized turbo inlet flange to greatly expand initial exhaust passage and cut exhaust backpressure significantly. The pipeline smoothly tapers down to standard 80mm outlet for seamless connection with original or aftermarket mid pipes. Integrated heavy-duty interlocked braided flex bellows fully absorbs harsh engine shifting vibration, effectively preventing weld fatigue and cracking during long-term high-load driving. Laser-cut OEM spec dual-hole mounting bracket and reserved sensor ports fully match factory chassis layout, supporting direct bolt-on installation without cutting or modification. Handcrafted uniform fish-scale TIG airtight welding delivers outstanding structural stability under sustained extreme high exhaust temperature. Mirror polished smooth metal surface creates clean racing visual effect inside engine bay.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cstrong\u003eImportant Fitment Reminder\u003c\/strong\u003e: This pipe only fits vehicles equipped with Gen1 B58 engine produced 2016-2019, incompatible with B58TU Gen2 and vehicles fitted with OPF filter system. We recommend confirming vehicle chassis, production year and VIN before purchase to avoid mismatching.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eVEHICLE FITMENT\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW F20 F21 M140i\u003c\/strong\u003e — 2016-2019 (B58 Gen1 3.0L Twin Turbo Inline Six Engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW F30 F31 F34 340i\u003c\/strong\u003e — 2016-2019 (B58 Gen1 3.0L Twin Turbo Inline Six Engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW F32 F33 F36 440i\u003c\/strong\u003e — 2016-2019 (B58 Gen1 3.0L Twin Turbo Inline Six Engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW G30 G31 540i\u003c\/strong\u003e — 2016-2019 (B58 Gen1 3.0L Twin Turbo Inline Six Engine)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Gauge Mandrel Bent Premium T304 Stainless Steel Construction:\u003c\/strong\u003e Thick solid pipe wall with excellent anti-rust and high-temperature resistance, durable for daily street and track performance driving.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror Polished Bright Reflective Smooth Finish:\u003c\/strong\u003e Glossy reflective surface presents neat motorsport style under hood, easy to wipe and clean during routine maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e114mm \/ 4.5 Inch Oversized Turbo Inlet Flange Design:\u003c\/strong\u003e Widened turbo connecting opening maximizes initial exhaust airflow, sharply reduces backpressure and shortens turbo lag obviously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth Taper Transition Pipeline:\u003c\/strong\u003e Gradually narrows from large upper body to standard 80mm outlet, perfectly compatible with stock mid pipe and most aftermarket exhaust assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Interlocked Braided Flexible Bellows Section:\u003c\/strong\u003e Double-layer lined flex pipe buffers strong engine displacement vibration, eliminates risk of weld fracture under long intense high-rev operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaser Cut OEM Spec Dual-Hole Mount Bracket \u0026amp; Sensor Bungs:\u003c\/strong\u003e Precisely positioned mounting lugs and sensor holes fully align factory installation points, no extra drilling or chassis modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniform Handcrafted Fish-Scale TIG Air-Tight Welding:\u003c\/strong\u003e Flawless seamless airtight welds maintain structural integrity under continuous extreme heat, lower abnormal rattling and exhaust leakage risks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Plug \u0026amp; Play Fitment:\u003c\/strong\u003e Entire pipeline replicates original vehicle chassis curve, bolts directly to factory brackets without cutting chassis components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eTECH SPECIFICATIONS\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Pipe Material:\u003c\/strong\u003e Thick Mandrel Bent T304 Stainless Steel with Mirror Polished Finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurbo Inlet Diameter:\u003c\/strong\u003e 114mm \/ 4.5 Inch Oversized Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Diameter:\u003c\/strong\u003e Standard 80mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Buffer:\u003c\/strong\u003e Heavy-Duty Interlocked Braided Flexible Bellows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWelding Process:\u003c\/strong\u003e Handcrafted Fish-Scale TIG Seamless Air-Tight Welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e B58 Gen1 3.0L Twin Turbo Inline Six — 2016-2019\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWHAT'S IN THE BOX\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e1x Complete Mirror Polished 114mm Oversized Inlet High Flow Front Downpipe Assembly\u003c\/li\u003e\n\u003cli\u003eFull Set OEM Matching Installation Clamps \u0026amp; Hardware Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Wanmax Racing","offers":[{"title":"Default Title","offer_id":54989662454132,"sku":null,"price":244.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/7244\/2740\/files\/H78115fa17a974178b6cfef5108737ca70.jpg?v=1784537955","url":"https:\/\/wanmaxracing.com\/products\/4-5-inch-114mm-b58-gen1-racing-downpipe-for-bmw-f20-f30-f32-g30-140i-340i-440i-540i-ss304-exhaust-pipe","provider":"Wanmax Racing","version":"1.0","type":"link"}