{"product_id":"bmw-340i-440i-f30-f32-catback","title":"QHCE 340i \/ 440i Catback — F30 \/ F32 \/ F36 (B58 \u0026 N55)","description":"\u003cdiv class=\"qhce-prod\"\u003e\n\u003cp class=\"qhce-prod-intro\"\u003eThe F-chassis 3-Series with B58 (340i) and N55 (340i \/ 440i early) are factory-muted sleepers. This catback wakes them up to match the M-car siblings.\u003c\/p\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eFITMENT\u003c\/h3\u003e\n\u003ctable class=\"qhce-prod-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003ctd\u003eF30 (sedan), F32 (coupe), F36 (Gran Coupe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003ctd\u003e2013 – 2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEngines\u003c\/th\u003e\n\u003ctd\u003eB58B30M1 (2016+ 340i) \/ N55B30 (2013-2015 335i, 2014-2016 435i, 2014-2018 440i)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTrims\u003c\/th\u003e\n\u003ctd\u003e340i, 340i xDrive, 440i, 440i xDrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMid-pipe flange\u003c\/th\u003e\n\u003ctd\u003eOEM 3-bolt — fits both B58 and N55 with no adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eSOUND PROFILE\u003c\/h3\u003e\n\u003cp\u003eF-chassis cars have the room for the exhaust to breathe more than the newer G-chassis. Closed: meaningful step up from stock. Open: snarls hard on cold start, sustained low growl on highway, factory-M-style burble on overrun.\u003c\/p\u003e\n\u003cdiv class=\"qhce-prod-sound\"\u003e\n\u003cdiv class=\"qhce-prod-sound-row\"\u003e\n\u003cspan class=\"qhce-prod-sound-label\"\u003eSTOCK OEM\u003c\/span\u003e\u003cdiv class=\"qhce-prod-sound-bar\"\u003e\u003cdiv class=\"qhce-prod-sound-fill\" style=\"width:40%;background:#666\"\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cspan class=\"qhce-prod-sound-val\"\u003e~75 dB\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-sound-row\"\u003e\n\u003cspan class=\"qhce-prod-sound-label\"\u003eVALVES CLOSED\u003c\/span\u003e\u003cdiv class=\"qhce-prod-sound-bar\"\u003e\u003cdiv class=\"qhce-prod-sound-fill\" style=\"width:50%;background:#888\"\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cspan class=\"qhce-prod-sound-val\"\u003e~80 dB\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-sound-row\"\u003e\n\u003cspan class=\"qhce-prod-sound-label\"\u003eVALVES OPEN\u003c\/span\u003e\u003cdiv class=\"qhce-prod-sound-bar\"\u003e\u003cdiv class=\"qhce-prod-sound-fill\" style=\"width:88%;background:#C8102E\"\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cspan class=\"qhce-prod-sound-val\"\u003e~95 dB\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"qhce-prod-sound-note\"\u003eMeasured at 50 ft, idle, ambient temp. Highway WOT 5-10 dB higher.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eMATERIAL SPECS\u003c\/h3\u003e\n\u003cul class=\"qhce-prod-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipes:\u003c\/strong\u003e 304 stainless steel, 1.5mm wall thickness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWelds:\u003c\/strong\u003e TIG-welded, back-purged for OEM-grade finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMuffler chamber:\u003c\/strong\u003e Multi-stage with electronic valve actuator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTips:\u003c\/strong\u003e Carbon fiber wrapped, 304 stainless inner, QHCE laser-engraved\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat shielding:\u003c\/strong\u003e Spot-welded stainless wrap on the muffler section\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eWHAT’S IN THE BOX\u003c\/h3\u003e\n\u003cul class=\"qhce-prod-list\"\u003e\n\u003cli\u003eFull catback assembly (mid-pipe + muffler + tailpipes)\u003c\/li\u003e\n\u003cli\u003ePre-installed electronic valve actuators\u003c\/li\u003e\n\u003cli\u003eWireless remote (glovebox-friendly fob)\u003c\/li\u003e\n\u003cli\u003eKey-chain switch (keyring-sized)\u003c\/li\u003e\n\u003cli\u003eIn-cabin controller (3M-mountable)\u003c\/li\u003e\n\u003cli\u003eAll OEM-spec hardware + gaskets + clamps\u003c\/li\u003e\n\u003cli\u003ePrinted installation guide (also linked digitally)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eINSTALLATION\u003c\/h3\u003e\n\u003cp\u003e2-3 hours in a home garage with a floor jack and stands. 45 minutes on a lift. Standard hand tools — no welding, no cutting, no tuning. New gaskets and OEM-spec clamps are included in the kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eSHIPPING \u0026amp; LEAD TIME\u003c\/h3\u003e\n\u003ctable class=\"qhce-prod-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProduction\u003c\/th\u003e\n\u003ctd\u003e~7 business days — every kit is built-to-order, TIG-welded and QC'd before it leaves the floor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003e4–5 business days, continental US, fully insured + tracked.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal time to door\u003c\/th\u003e\n\u003ctd\u003eRoughly 2.5 weeks from checkout to delivery.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping cost\u003c\/th\u003e\n\u003ctd\u003eFree on orders $1,000+ in the continental US. AK \/ HI \/ international quoted at checkout.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003ctd\u003eYou'll get a tracking number the moment the kit ships. Any production delays are flagged in writing the same day.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qhce-prod-spec-block\"\u003e\n\u003ch3\u003eWARRANTY\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLifetime structural warranty\u003c\/strong\u003e on the pipes — cracks, weld failures, rust-through, we cover it. \u003cstrong\u003e2 years\u003c\/strong\u003e on the electronic valve actuators and remote system. \u003cstrong\u003e90 days\u003c\/strong\u003e on cosmetic finish (carbon fiber tips and laser engraving).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"qhce-prod-legal\"\u003eFor off-road \/ track use only. Not legal for highway use in all 50 states. Buyer assumes responsibility for compliance with local emissions and noise regulations.\u003c\/p\u003e\n\u003c\/div\u003e\u003cstyle\u003e\n.qhce-prod{font-family:var(--font-body--family);color:#e6e6e6;line-height:1.6;font-size:1rem}\n.qhce-prod-intro{font-size:1.15rem;line-height:1.5;color:#fff;border-left:3px solid #C8102E;padding-left:18px;margin:0 0 32px 0;font-weight:400}\n.qhce-prod-spec-block{margin:0 0 36px 0}\n.qhce-prod h3{font-family:var(--font-heading--family);font-size:1.2rem;letter-spacing:0.08em;text-transform:uppercase;color:#fff;margin:0 0 14px 0;padding-bottom:6px;border-bottom:2px solid #C8102E;display:inline-block}\n.qhce-prod-table{width:100%;border-collapse:collapse;margin:8px 0 0 0}\n.qhce-prod-table th{font-family:var(--font-heading--family);font-size:0.85rem;letter-spacing:0.08em;text-transform:uppercase;color:#999;text-align:left;padding:10px 12px 10px 0;border-bottom:1px solid #ffffff14;width:35%;font-weight:400;vertical-align:top}\n.qhce-prod-table td{padding:10px 0;border-bottom:1px solid #ffffff14;color:#fff;font-size:0.95rem}\n.qhce-prod-list{padding:0;margin:8px 0 0 0;list-style:none}\n.qhce-prod-list li{padding:8px 0 8px 24px;position:relative;font-size:0.95rem;color:#cccccc}\n.qhce-prod-list li::before{content:\"\";position:absolute;left:0;top:14px;width:6px;height:6px;background:#C8102E;transform:rotate(45deg)}\n.qhce-prod-list strong{color:#fff;font-weight:600}\n.qhce-prod-sound{margin:16px 0 0 0;padding:18px;background:#141414;border-left:2px solid #C8102E}\n.qhce-prod-sound-row{display:grid;grid-template-columns:140px 1fr 70px;gap:12px;align-items:center;padding:6px 0}\n.qhce-prod-sound-label{font-family:var(--font-heading--family);font-size:0.75rem;letter-spacing:0.1em;text-transform:uppercase;color:#999}\n.qhce-prod-sound-bar{height:8px;background:#0a0a0a;overflow:hidden}\n.qhce-prod-sound-fill{height:100%}\n.qhce-prod-sound-val{font-family:var(--font-heading--family);font-size:0.85rem;color:#fff;text-align:right;letter-spacing:0.05em}\n.qhce-prod-sound-note{font-size:0.8rem;color:#666;margin:12px 0 0 0}\n.qhce-prod-legal{margin:32px 0 0 0;padding:14px 16px;background:#141414;border:1px solid #ffffff14;font-size:0.8rem;color:#999;letter-spacing:0.02em}\n@media (max-width:640px){.qhce-prod-sound-row{grid-template-columns:1fr;gap:4px;padding:10px 0}.qhce-prod-sound-bar{height:6px}}\n\u003c\/style\u003e","brand":"QHCE","offers":[{"title":"Default Title","offer_id":46861573259452,"sku":"QHCE-340I-440I-F","price":1200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/8904\/5692\/files\/01_main_7b744d22-4092-4964-ad1c-2f1513af4def.jpg?v=1781362044","url":"https:\/\/qhcemotors.com\/products\/bmw-340i-440i-f30-f32-catback","provider":"QHCE","version":"1.0","type":"link"}