{"product_id":"speed-logic-n54-catless-race-downpipes-bmw-135i-1m-335i","title":"Speed Logic Catless Race Downpipes – BMW 135i \/ 1M \/ 335i (N54)","description":"\u003cstyle\u003e.sl-desc h2{font-size:1.15em;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:6px;margin:1.6em 0 .7em}.sl-desc h3{font-size:1em;margin:1.2em 0 .4em}.sl-desc ul{margin:0 0 1em 1.2em}.sl-desc li{margin:.25em 0}.va-table{width:100%;border-collapse:collapse;margin:.5em 0 1em;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}.sl-note{font-size:.9em;color:#555;margin:.4em 0 1em}\u003c\/style\u003e\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eDownpipes are a proven modification on the N54, and Speed Logic's catless race downpipes for the 135i and 335i are good for over 30 wheel horsepower and 40 lb-ft at the wheels with adequate tuning. They use a full 3\" one-piece cast section at the V-band connection to the turbos, which keeps flow smooth and turbulence low where the factory pipe is at its most restrictive, and the improved flow brings a noticeably deeper engine and exhaust tone. Construction is 304 grade stainless throughout, TIG welded and argon backpurged, and every set ships with the gaskets and Grade 10 bolts, washers and nuts needed to complete the installation. All Speed Logic products carry a lifetime warranty against manufacturer defects and fitment issues.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFull 3\" diameter, one-piece cast design at the turbo V-band entry, stepping to a 2.5\" connection at the midpipe \/ catback\u003c\/li\u003e\n\u003cli\u003eCatless race downpipes - one for the front turbo, one for the rear turbo\u003c\/li\u003e\n\u003cli\u003eFull 304 grade stainless steel construction\u003c\/li\u003e\n\u003cli\u003eAdds 30+ horsepower and 40+ lb-ft of torque with adequate tuning\u003c\/li\u003e\n\u003cli\u003e100% TIG welded, all welds fully backpurged with 100% argon\u003c\/li\u003e\n\u003cli\u003eWelds are not ground or polished\u003c\/li\u003e\n\u003cli\u003eWorks with all stock-location turbos: OEM, Pure Turbos (Pure600, Daily Driver, High Flow), Vargas Turbos (Stage 1, Stage 2, Stage 2+), RB Turbos (Stage 1, Stage 2, Stage 2+, GFs)\u003c\/li\u003e\n\u003cli\u003eReplaces OEM BMW downpipe part numbers 18307587609 and 18307587610\u003c\/li\u003e\n\u003cli\u003eGasket set and Grade 10 downpipe hardware included\u003c\/li\u003e\n\u003cli\u003eFits both Left Hand Drive (LHD) and Right Hand Drive (RHD) vehicles without modification\u003c\/li\u003e\n\u003cli\u003eCatless - off-road use only, not available for sale in California or other emissions-testing states\u003c\/li\u003e\n\u003cli\u003eIncludes a Speed Logic LIFETIME warranty against defects and fitment issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Speed Logic downpipes - one for the front turbo, one for the rear turbo\u003c\/li\u003e\n\u003cli\u003e(2) Downpipe gaskets\u003c\/li\u003e\n\u003cli\u003e(4) Bolts, washers, lock washers and nuts for the midpipe connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA tune is required. These are catless downpipes, and without supporting software the car will log catalyst efficiency faults and throw a check engine light. Speed Logic supplies the \u003ca href=\"\/products\/mhd-super-license-for-n54\"\u003eMHD Super License for N54 Engine\u003c\/a\u003e and the \u003ca href=\"\/products\/n54-jb4-bmw-performance-tuner\"\u003eJB4 Tuner for N54 BMW\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eNo other hardware is needed - the gaskets and Grade 10 fasteners for the midpipe connection are supplied in the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eNo installation document is published for these downpipes. Our team is available to answer fitment questions, and installation is available at our Southern California facility.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e*NOTE: Speed Logic Downpipes are for OFFROAD USE ONLY and not available for sale in California and other states with emissions testing.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eSpeed Logic does not publish its own part number for these downpipes, so no part number is listed - the OEM numbers they replace are shown in SPECS. This part is sold for off-road and competition use only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ Model\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW 135i\u003c\/td\u003e\n\u003ctd\u003eE82 \/ E88\u003c\/td\u003e\n\u003ctd\u003eN54 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2008-2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW 1M\u003c\/td\u003e\n\u003ctd\u003eE82\u003c\/td\u003e\n\u003ctd\u003eN54 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW 335i\u003c\/td\u003e\n\u003ctd\u003eE90 \/ E91 \/ E92 \/ E93\u003c\/td\u003e\n\u003ctd\u003eN54 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2007-2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW 335is\u003c\/td\u003e\n\u003ctd\u003eE92 \/ E93\u003c\/td\u003e\n\u003ctd\u003eN54 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2011-2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Speed Logic","offers":[{"title":"Default Title","offer_id":43316949483686,"sku":"","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/products\/N54Downpipes-Shopify08_2a04492d-f49d-4df6-95b0-08480b9d5dac.png?v=1660854888","url":"https:\/\/speedlogicauto.com\/products\/speed-logic-n54-catless-race-downpipes-bmw-135i-1m-335i","provider":"SPEED LOGIC","version":"1.0","type":"link"}