{"product_id":"evolution-racewerks-er-bmw-b58-f20-f30-4-5-high-flow-catted-downpipe-m140i-m240i-340i-440i-x3-x4-x5-m40ix","title":"Evolution Racewerks (ER) BMW B58 F \u0026 G Chassis 4.5\" High Flow Catted Downpipe (M140i, M240i, 340i, 440i, Z4 M40i \u0026 X3\/X4\/X5 M40ix)","description":"\u003ch4\u003e\u003cspan\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eOur new Sports Series Metallic High Flow Downpipes for your 2016+ 240i\/340i\/440i\/540i and 2017+ X3\/X4\/X5 M40iX six cylinder B58 turbo engine!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eRestrictions in the exhaust system robs horsepower and torque especially on turbocharged cars.  Thus, removing as much exhaust flow restrictions will increase horsepower and torque significantly.  The factory catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction. The factory catalytic converter is made up of catalyst material formed into \"honeycomb\" weaves. Exhaust gas must pass through these tiny \"honeycomb\" weaves on their way to the exhaust system thus causing a major exhaust flow restriction. It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction). By replacing the factory downpipe\/catalytic converter with our Sports Series 4\" High Flow Metallic Catted Downpipe, more power is unleashed! \u003c\/p\u003e\n\u003cp\u003eThe factory catalyter uses a 900 cell ceramic core. What the 900 cells means is that per every inch, there are 900 \"cells\" that the exhaust gas must pass through. We use a 200 cell metallic core. By having less cells per square inch, these individual \"cells\" are bigger in size thus allowing exhaust gas to pass through it more easily. Thus, the lower the cell count, the higher the flow. Higher flow = more power, faster turbo spool up (less turbocharger lag) and better throttle response. Bottom line, faster. The benefits of a metallic catalytic converter vs a ceramic like the factory is that it can take higher temperatures and is more durable (last longer). They are also lighter than their ceramic counterparts.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWe also recommend to replace the \u003c\/span\u003e\u003cspan style=\"text-decoration: underline; color: #2b00ff;\"\u003e\u003cstrong\u003e\u003ca href=\"\/products\/genuine-bmw-b58-downpipe-gasket-m140i-m240i-340i-440i\" title=\"GENUINE BMW B58 DOWNPIPE GASKET (M140I, M240I, 340I, 440I \u0026amp; 540I) - \" style=\"text-decoration: underline; color: #2b00ff;\" target=\"_blank\"\u003edownpipe gasket\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e when installing the ER downpipe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e200 Cell Metallic Catalytic Converter Element\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eOur Sports Series 4\" High Flow Catted Downpipes is constructed out of 100% 304 grade stainless steel and utilize mandrel bent piping. They are 100% TIG welded by our in house fabricators and built in the USA. The factory turbocharger turbine housing utilizes a 4\" V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods. The O2 sensor is positioned at the factory location. Since the outlet of the turbocharger is 4.5\" and the factory exhaust system is 3\", the factory downpipes reduces size using short transitions from 4\" before the catalytic convert and 3\" afterwards. Due to space needed for the catalytic converter, the factory downpipes reduce in size using very short transitions. Since our catless downpipes delete the catalytic converter, we have more space. Thus, we use very long transitions. These longer transitions allow the exhaust gas time to smoothly transition from the larger piping to the smaller. This results in less exhaust turbulence and backpressure which again improves throttle response and increase turbocharger spool times (less turbocharger lag). \u003cbr\u003e\u003cbr\u003eThe factory downpipe utilizes a flex bellow section that allows the exhaust system to move. This eliminates undue stress on the exhaust components like the exhaust system, downpipe, turbocharger and exhaust manifold. Many of our competitors do not feel it is important to keep this. While you do not see any adverse affects right away, over time, the stresses caused by not having a flex section and having a rigid exhaust system will cause premature wear and tear. Any stress failures like cracks will form quicker than usual on exhaust manifolds and exhaust components. Also, without a flex section, the exhaust system cannot properly deflect impact. Especially on lowered cars, whenever the exhaust system contacts the ground, the entire system gets pushed up. Without a flex, you can imagine how much stress is put into exhaust components like the exhaust manifold when the exhaust is pushed upwards. We fully understand that durability of our products is important. Thus, like BMW, we incorporate a flex section into our downpipe. Our flex sections are 100% stainless steel (cheap flex sections only have stainless steel center braids and steel caps) to ensure corrosion resistance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eFeatures\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFitment for the new BMW B58 Engine\u003c\/li\u003e\n\u003cli\u003eHigh Flow 200 cell metallic catalytic converter used\u003c\/li\u003e\n\u003cli\u003eHigher Max Horsepower Power Curve\u003c\/li\u003e\n\u003cli\u003eHigher Intial Torque Curve. Torque curve hits faster, higher, and longer\u003c\/li\u003e\n\u003cli\u003eBetter throttle response and faster turbo spool up times\u003c\/li\u003e\n\u003cli\u003eMandrel Bent 4.5\"\/4\" piping. Smooth transition to the exhaust system\u003c\/li\u003e\n\u003cli\u003e100% Stainless Steel Construction\u003c\/li\u003e\n\u003cli\u003e100% TIG welded for better quality welds\u003c\/li\u003e\n\u003cli\u003ePrecision CNC machined turbocharger V-Band flange\u003c\/li\u003e\n\u003cli\u003eBrush Finish (standard) or optional Polish Finish\u003c\/li\u003e\n\u003cli\u003eAvailable with high temperature Black Thermal Coating to reduce underhood temperatures\u003c\/li\u003e\n\u003cli\u003eOptional - Additional O2 sensor bung for wideband O2 sensors (comes with pre-installed plug)\u003c\/li\u003e\n\u003cli\u003eOptional EGT sensor bung for EGT gauges (comes with pre-installed plug)\u003c\/li\u003e\n\u003cli\u003eCompatible with the factory or aftermarket exhaust systems\u003c\/li\u003e\n\u003cli\u003eTrack tested durability\u003c\/li\u003e\n\u003cli\u003eIncludes all hardware for complete installation\u003c\/li\u003e\n\u003cli\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003cli\u003eMade in the USA!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSO WHY 4.5\" PIPING? \u003c\/strong\u003eThe new turbochargers on the B58 engines utilize a much larger 4.5\" outlet compared to the 4\" outlet on the older N55 engines. If we ran a 4\" downpipe flange inlet so that we can use 4\" tubing, a \"step\" would be formed between the turbocharger outlet and downpipe inlet. Exhaust gas for the turbocharger would hit this \"step\" and a lot of turbulence would form at this point and cause backpressure. Backpressure this close to the turbocharger would greatly affect performance. Thus, to ensure that we get unobstructed flow from the turbocharger outlet to the downpipe inlet, we had to CNC machine a new 4.5\" flange to match. This allows a seamless transition and eliminate any possible turbulence which would cause backpressure. Though this presented another challenge for us as 4.5\" tubing is not readily available and hard to source. The ER motto \"Performance, No Compromise\" prevailed at the end and through hard diligence and many phone calls, we finally found a source for the material.  Even though the material was considerably more expensive than standard 4\" stainless steel, we wanted to give our customers the best by producing the best product possible.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"Evolution Racewerks (ER) BMW 4.5 Catless Downpipe B58 M140i, M240i, 340i \u0026amp; 440i | \" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1272\/9301\/files\/Evolution_Racewerks_ER_BMW_4.5_Catless_Downpipe_B58_M140i_M240i_340i_440i_Stock_1024x1024.jpg?v=1486246786\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOPTIONS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCeramic Thermal Coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out.  This keeps underhood temperatures lower and less heat absortion by nearby parts\/surfaces.  Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower backpressure.  The ceramic coating also adds additonal corrosion resistance.  We utilize the best ceramic coating possible.  Our thermal coating can resist up to 2000F of heat.  It is available in black only (all the other colors cannot withstand heat that high).\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdditional O2 Sensor Bung\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAn additional O2 sensor bung can be added so that you can easily add a wideband o2 sensor and gauges so that you can monitor air\/fuel ratios.  The additional O2 sensor bung will come pre-installed with a plug so that you do not need to run the o2 sensor right away.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptional EGT (Exhaust Gas Temperature) Bung\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAn additional 1\/8\" NPT bung can be added so that you can easily add a EGT sensor and gauge.  The optional EGT sensor bung will come pre-installed with a plug so that you do not need to run the EGT sensor right away.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe ER downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system. There are no compatibility issues whatsover.  The downpipes will come by default in Brushed Finish.  \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan class=\"bigblack\"\u003eBMW 1 Series\u003c\/span\u003e\u003cbr\u003e• 2016+ F20\/F21 B58 M140i\/x\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eBMW 2 Series\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e• 2016+ F22 F23 B58 M240i\/x\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"bigblack\"\u003eBMW 3 Series\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• 2016+ F30 F31 F34 GT B58 340i and 340ix\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e• 2019+ G20 B58 M340i and M340ix\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"bigblack\"\u003eBMW 4 Series\u003c\/span\u003e\u003cbr\u003e• 2016+ F32 F33 F36 B58 440i\/x\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"bigblack\"\u003eBMW 5 Series\u003c\/span\u003e\u003cbr\u003e• G30 540i\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eBMW X Series\u003cbr\u003e\u003cspan\u003e• G01 X3 M40ix\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• G02 X4 M40ix\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• G05 X5 M40ix\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan class=\"bigblack\"\u003eBMW Z Series\u003c\/span\u003e\u003cbr\u003e• G29 Z4 M40i\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003ePerformance Gains\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eER B58 4.5\" Downpipe Dyno (Click to enlarge in a new window) - Catless Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1272\/9301\/files\/Evolution_Racewerks_ER_BMW_4.5_Catless_Downpipe_B58_M140i_M240i_340i_440i_Dyno_1024x1024.jpg?v=1486246575\" title='Evolution Racewerks (ER) BMW 4.5\" Catless Downpipe B58 M140i, M240i, 340i \u0026amp; 440i Dyno | ' target=\"_blank\"\u003e\u003cspan\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1272\/9301\/files\/Evolution_Racewerks_ER_BMW_4.5_Catless_Downpipe_B58_M140i_M240i_340i_440i_Dyno_1024x1024.jpg?v=1486246575\" alt=\"Evolution Racewerks (ER) BMW 4.5 Catless Downpipe B58 M140i, M240i, 340i \u0026amp; 440i Dyno | \"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch4\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eBM-EXH018SCAT (Brushed)\u003cbr\u003eBM-EXH018PCAT (Polished)\u003cbr\u003eBM-EXH018TBCAT (Ceramic Thermal Coated Black)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eMore Information\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eManufactured by\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvolution Racewerks (ER)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEvolution Racewerks (ER) Limited Lifetime Warranty (Non-Transferable)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Evolution Racewerks (ER)","offers":[{"title":"Brushed \/ Without EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035452765,"sku":"BM-EXH018SCAT","price":718.2,"currency_code":"GBP","in_stock":true},{"title":"Brushed \/ Without EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035485533,"sku":"BM-EXH018SCAT-O2","price":726.07,"currency_code":"GBP","in_stock":true},{"title":"Brushed \/ Include EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035518301,"sku":"BM-EXH018SCAT-EGT","price":722.3,"currency_code":"GBP","in_stock":true},{"title":"Brushed \/ Include EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035551069,"sku":"BM-EXH018SCAT-EGT-O2","price":737.35,"currency_code":"GBP","in_stock":true},{"title":"Polished \/ Without EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035583837,"sku":"BM-EXH018PCAT","price":748.64,"currency_code":"GBP","in_stock":false},{"title":"Polished \/ Without EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035616605,"sku":"BM-EXH018PCAT-O2","price":763.69,"currency_code":"GBP","in_stock":true},{"title":"Polished \/ Include EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035649373,"sku":"BM-EXH018PCAT-EGT","price":759.92,"currency_code":"GBP","in_stock":true},{"title":"Polished \/ Include EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035682141,"sku":"BM-EXH018PCAT-EGT-O2","price":774.97,"currency_code":"GBP","in_stock":true},{"title":"Ceramic Thermal Coated Black \/ Without EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035714909,"sku":"BM-EXH018TBCAT","price":790.4,"currency_code":"GBP","in_stock":false},{"title":"Ceramic Thermal Coated Black \/ Without EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035747677,"sku":"BM-EXH018TBCAT-O2","price":797.54,"currency_code":"GBP","in_stock":true},{"title":"Ceramic Thermal Coated Black \/ Include EGT Bung \/ Without O2 Sensor Bung","offer_id":64545035780445,"sku":"BM-EXH018TBCAT-EGT","price":793.78,"currency_code":"GBP","in_stock":true},{"title":"Ceramic Thermal Coated Black \/ Include EGT Bung \/ Include O2 Sensor Bung","offer_id":64545035813213,"sku":"BM-EXH018TBCAT-EGT-O2","price":808.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1069\/0009\/5325\/files\/Image-Coming-Soon_f2362882-ba02-4570-be6e-1a2046381eba.png?v=1777522426","url":"https:\/\/performancepartsdirect.co.uk\/products\/evolution-racewerks-er-bmw-b58-f20-f30-4-5-high-flow-catted-downpipe-m140i-m240i-340i-440i-x3-x4-x5-m40ix","provider":"Performance Parts Direct","version":"1.0","type":"link"}