{"product_id":"milltek-cat-back-exhaust-bmw-4-series-f82-83-m4-comp-coupe-convertible-non-opf-14-18","title":"Milltek Cat Back Exhaust BMW 4 Series F82 83 M4 Comp Coupe Convertible Non-OPF 14-18","description":"\u003ch2\u003eMilltek Cat-back Exhaust for BMW 3 Series F80 M3 \u0026amp; M3 Competition Saloon (Non OPF\/GPF Models Only) (2014-2018) – Sharper Sound, Reduced Back Pressure\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's cat-back system for the BMW 4 Series F82\/83 M4 Coupe\/Convertible \u0026amp; M4 Competition Coupé (Non-OPF equipped models only). It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in resonated EC approved, non-resonated or race non-resonated versions and 5 tailpipe finishes, so you can pick the setup that suits how the car's used.\u003c\/p\u003e\n\u003cp\u003eIt's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Cat-back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 70mm (2.76\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace System:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMade from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration\u003c\/li\u003e\n\u003cli\u003eMandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow\u003c\/li\u003e\n\u003cli\u003e70mm (2.76\") pipework\u003c\/li\u003e\n\u003cli\u003eReplaces the standard exhaust from the catalytic converter back, so the factory cat is retained\u003c\/li\u003e\n\u003cli\u003eChoice of 5 tailpipe finishes: Carbon Fibre, Cerakote Black, Polished, Titanium, Burnt Titanium\u003c\/li\u003e\n\u003cli\u003eEC approved versions available\u003c\/li\u003e\n\u003cli\u003eResonated (quieter) or non-resonated (louder) versions\u003c\/li\u003e\n\u003cli\u003eDesigned, developed and manufactured in the UK by Milltek Sport\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 3 Series F80 M3 \u0026amp; M3 Competition Saloon (Non OPF\/GPF Models Only) (2014-2018)\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series F82\/83 M4 Coupe\/Convertible \u0026amp; M4 Competition Coupé (Non-OPF equipped models only) (2014-2018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the BMW 3 Series F80 M3, M3 Competition \u0026amp; M3 CS Saloon (OPF\/GPF Models Only), which needs the \u003ca href=\"\/products\/milltek-cat-back-exhaust-bmw-3-series-f80-m3-comp-cs-saloon-opf-gpf-19-20\"\u003eMilltek Cat-back Exhaust BMW 3 Series F80 M3, M3 Comp M3 CS Saloon OPF\/GPF 19-20\u003c\/a\u003e; the BMW 3 Series G80 M3 \u0026amp; M3 Competition S58 3.0 Turbo (North American\/ROW Non-OPF\/GPF Cars Only), which needs the \u003ca href=\"\/products\/milltek-filter-back-exhaust-bmw-3-series-g80-g81-m3-comp-s58-3-0-turbo-opf-gpf-touring-xdrive-20\"\u003eMilltek Filter-back Exhaust BMW 3 Series G80 G81 M3 Comp S58 3.0 Turbo OPF\/GPF Touring XDrive 20+\u003c\/a\u003e; the BMW 3 Series G20 \u0026amp; G21 M340i XDrive Saloon \u0026amp; Touring Models (OPF\/GPF Models Only) Pre LCI, which needs the \u003ca href=\"\/products\/milltek-cat-back-exhaust-bmw-3-series-g20-g21-m340i-xdrive-saloon-touring-opf-gpf-pre-lci-19-25\"\u003eMilltek Cat-back Exhaust BMW 3 Series G20 \u0026amp; G21 M340i XDrive Saloon \u0026amp; Touring OPF\/GPF Pre LCI 19-25\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eSome versions: EC-Approved. Carbon Tips - OE System requires cutting. Some versions: EC-Approved. Cerakote Black Tips - OE System requires cutting. Some versions: EC-Approved. Polished Tips - OE System requires cutting. Some versions: EC-Approved. Titanium Tips - OE System requires cutting. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.\u003c\/p\u003e\n\u003ch3\u003eUpgrade Further\u003c\/h3\u003e\n\u003cp\u003eAlso available from Milltek for this car: \u003ca href=\"\/products\/milltek-decat-downpipe-bmw-3-series-f80-m3-comp-saloon-non-opf-gpf-14-18\"\u003eMilltek Downpipe \u0026amp; De-cat BMW 3 Series F80 M3 \u0026amp; M3 Comp Saloon Non OPF\/GPF 14-18\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between the resonated and non-resonated versions?\u003c\/h3\u003e\n\u003cp\u003eThe resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive. Race versions are the loudest and are intended for track use.\u003c\/p\u003e\n\u003ch3\u003eWhich tailpipe finishes are available?\u003c\/h3\u003e\n\u003cp\u003eYou can choose from: Carbon Fibre, Cerakote Black, Polished, Titanium, Burnt Titanium. The finish is cosmetic and does not change the sound.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the BMW 4 Series F82\/83 M4 Coupe\/Convertible \u0026amp; M4 Competition Coupé (Non-OPF equipped models only)?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the BMW 4 Series F82\/83 M4 Coupe\/Convertible \u0026amp; M4 Competition Coupé (Non-OPF equipped models only) as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the BMW 3 Series F80 M3, M3 Competition \u0026amp; M3 CS Saloon (OPF\/GPF Models Only)?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-cat-back-exhaust-bmw-3-series-f80-m3-comp-cs-saloon-opf-gpf-19-20\"\u003eMilltek Cat-back Exhaust BMW 3 Series F80 M3, M3 Comp M3 CS Saloon OPF\/GPF 19-20\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs it road legal?\u003c\/h3\u003e\n\u003cp\u003eSome versions are EC approved; check the EC Approved line in the specification for the option you choose.\u003c\/p\u003e\n\u003ch3\u003eDo I need a remap?\u003c\/h3\u003e\n\u003cp\u003eNo. It fits behind the factory catalytic converter, so no software changes are needed.\u003c\/p\u003e\n\u003ch3\u003eDoes it keep the factory catalytic converter?\u003c\/h3\u003e\n\u003cp\u003eYes. It fits behind the factory catalytic converter, which stays in place.\u003c\/p\u003e\n\u003ch3\u003eWhat is it made from?\u003c\/h3\u003e\n\u003cp\u003eT304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.\u003c\/p\u003e\n\u003ch3\u003eIs there a warranty?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.\u003c\/p\u003e","brand":"Milltek","offers":[{"title":"Resonated - EC Approved \/ Carbon Fibre","offer_id":56392774648193,"sku":"MIL-SSXBM1062","price":2267.66,"currency_code":"GBP","in_stock":true},{"title":"Resonated - EC Approved \/ Cerakote Black","offer_id":56392774680961,"sku":"MIL-SSXBM993","price":2216.52,"currency_code":"GBP","in_stock":true},{"title":"Resonated - EC Approved \/ Polished","offer_id":56392774713729,"sku":"MIL-SSXBM992","price":2046.19,"currency_code":"GBP","in_stock":true},{"title":"Resonated - EC Approved \/ Titanium","offer_id":56392774746497,"sku":"MIL-SSXBM994","price":2491.61,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ Burnt Titanium","offer_id":56392774779265,"sku":"MIL-SSXBM1150","price":2652.71,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ Carbon Fibre","offer_id":56392774812033,"sku":"MIL-SSXBM1149","price":2250.39,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ Cerakote Black","offer_id":56392774844801,"sku":"MIL-SSXBM1147","price":2199.25,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ Polished","offer_id":56392774877569,"sku":"MIL-SSXBM1146","price":2028.92,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ Titanium","offer_id":56392774910337,"sku":"MIL-SSXBM1148","price":2474.33,"currency_code":"GBP","in_stock":true},{"title":"Race, Non-Resonated \/ Carbon Fibre","offer_id":56392774943105,"sku":"MIL-SSXBM1063","price":2270.07,"currency_code":"GBP","in_stock":true},{"title":"Race, Non-Resonated \/ Cerakote Black","offer_id":56392774975873,"sku":"MIL-SSXBM996","price":2218.93,"currency_code":"GBP","in_stock":true},{"title":"Race, Non-Resonated \/ Polished","offer_id":56392775008641,"sku":"MIL-SSXBM995","price":2048.61,"currency_code":"GBP","in_stock":true},{"title":"Race, Non-Resonated \/ Titanium","offer_id":56392775041409,"sku":"MIL-SSXBM997","price":2494.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXBM1062_1.jpg?v=1791892345","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-cat-back-exhaust-bmw-4-series-f82-83-m4-comp-coupe-convertible-non-opf-14-18","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}