{"title":"Milltek","description":"\u003cp\u003eMilltek Sport is the UK's leading manufacturer of performance exhaust systems, producing every system at their Derby factory to the highest quality standards. With over 40 years of motorsport heritage and ISO 9001 certification, Milltek Sport exhausts are trusted by enthusiasts and professional race teams worldwide.\u003c\/p\u003e\u003cp\u003eAt String Theory Garage, we stock the full Milltek Sport range for some of the most exciting performance cars available today — including the \u003cstrong\u003eToyota GR Yaris\u003c\/strong\u003e (Gen 1 \u0026amp; Gen 2), \u003cstrong\u003eBMW M3 \u0026amp; M4\u003c\/strong\u003e (F80\/F82 and G8X generation), \u003cstrong\u003eBMW M2\u003c\/strong\u003e (F87 \u0026amp; G87), \u003cstrong\u003eBMW M135i \u0026amp; M140i\u003c\/strong\u003e, and \u003cstrong\u003ePorsche 911\u003c\/strong\u003e (991, 992, GT3), \u003cstrong\u003ePorsche 718\u003c\/strong\u003e Cayman \u0026amp; Boxster, \u003cstrong\u003ePorsche Cayenne\u003c\/strong\u003e, and \u003cstrong\u003ePorsche Macan\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eEvery Milltek Sport system is crafted from 304L aircraft-grade stainless steel, ensuring exceptional durability and corrosion resistance that will last the life of your car. Whether you're looking for an ECE-approved road-legal system, an electronically controlled valved exhaust, a high-flow sports catalyst, or a track-focused race system, Milltek Sport has the solution.\u003c\/p\u003e\u003cp\u003eAll Milltek Sport exhausts are designed as direct OEM replacements — straightforward to fit, with no modifications required. Systems are available in a range of tip finishes including polished, brushed titanium, burnt titanium, Cerakote black, and carbon fibre, allowing you to personalise the look of your car's exhaust.\u003c\/p\u003e","products":[{"product_id":"milltek-3-resonated-exhaust-system-for-toyota-gr-yaris-opf-gpf-filter-back","title":"Milltek 3\" Resonated Exhaust System for Toyota GR Yaris Gen 1 – OPF\/GPF Filter Back","description":"\u003cp\u003eTransform the exhaust note of your Toyota GR Yaris Gen 1 with this Milltek Sport Resonated OPF\/GPF Filter-Back System. Engineered specifically for the 1.6T turbocharged three-cylinder, this ECE-approved system replaces the factory particulate filter-back section with a free-flowing 76mm (3\") stainless steel system that delivers a noticeably improved exhaust note whilst retaining everyday refinement.\u003c\/p\u003e\u003cp\u003eThe resonated design uses an internal baffle to smooth out drone and harshness at motorway speeds, making this the ideal daily driver upgrade. You get all the character and improved sound of a performance exhaust without the discomfort of a non-resonated system on longer journeys. Available in five tip finishes to suit your GR Yaris's colour and style.\u003c\/p\u003e\u003cp\u003eDesigned as a direct bolt-on replacement for the OEM exhaust — no cutting, welding, or modifications required. ECU remapping is not required for this system, though it can complement a Stage 1 tune. 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Removing the factory resonator gives this system a louder, more aggressive exhaust note that truly reflects the GR Yaris's motorsport DNA. Constructed from 76mm (3\") diameter stainless steel tubing, this system significantly reduces back pressure through the OPF\/GPF section for improved exhaust gas evacuation.\u003c\/p\u003e\u003cp\u003eThe non-resonated design produces a full, characterful exhaust tone that's particularly impressive under acceleration. For enthusiast drivers who want the most dramatic sound improvement without touching the OPF\/GPF itself, this is the definitive choice. Available in five tip finishes to perfectly complement your GR Yaris.\u003c\/p\u003e\u003cp\u003eA direct bolt-on replacement for the factory exhaust — no cutting, welding, or ECU remapping required. An optional remap will further maximise performance, but this system transforms the sound and feel of the car straight out of the box. Manufactured from 304L aircraft-grade stainless steel at Milltek Sport's UK factory.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFitment: Toyota GR Yaris \u0026amp; GR Yaris Circuit Pack 1.6T (OPF\/GPF Models Only) 2020–2024\u003c\/li\u003e\n\u003cli\u003ePipe diameter: 76.20mm (3\")\u003c\/li\u003e\n\u003cli\u003eTip options: Polished, Brushed Titanium, Burnt Titanium, Cerakote Black, Carbon Fibre\u003c\/li\u003e\n\u003cli\u003eE-marked: Yes (ECE approved)\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement — no modifications required\u003c\/li\u003e\n\u003cli\u003eMade in the UK\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Burnt Titanium","offer_id":56740925636992,"sku":"SSXTY130","price":1499.84,"currency_code":"GBP","in_stock":true},{"title":"Cerakote Black","offer_id":56740925669760,"sku":"SSXTY128","price":1304.47,"currency_code":"GBP","in_stock":true},{"title":"Polished","offer_id":56740925702528,"sku":"SSXTY127","price":1149.82,"currency_code":"GBP","in_stock":true},{"title":"Titanium","offer_id":56740925735296,"sku":"SSXTY129","price":1432.37,"currency_code":"GBP","in_stock":true},{"title":"Carbon","offer_id":56740925768064,"sku":"SSXTY131","price":1463.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/7557\/5573\/files\/Milltek_3_Non-Resonated_Exhaust_System_for_Toyota_GR_Yaris_OPF_GPF_Filter_Back_-_Burnt_Titanium_-_SSXTY130.jpg?v=1761138838"},{"product_id":"milltek-3-resonated-exhaust-system-for-toyota-gr-yaris-gen-1-opf-gpf-filter-back-copy","title":"Milltek 3\" Resonated Exhaust System for Toyota GR Yaris Gen 2 – OPF\/GPF Filter Back","description":"\u003cp\u003eElevate the exhaust note of your Toyota GR Yaris Gen 2 (2024 and later) with this Milltek Sport Resonated OPF\/GPF Filter-Back System. Built for the updated GR Yaris platform, this 76mm (3\") stainless steel system is designed as a direct replacement for the factory particulate filter-back section, delivering a richer, more composed exhaust note whilst remaining fully road-legal and ECE approved.\u003c\/p\u003e\u003cp\u003eThe resonated internals smooth out any drone or resonance at cruising speeds, making this system as comfortable on the motorway as it is exciting on a B-road. You'll immediately notice an improved bark on acceleration and a more satisfying induction-to-exhaust soundtrack — all without compromising day-to-day usability. Available in five tip finishes, including the new Brushed Titanium and Burnt Blue Titanium options exclusive to the Gen 2 range.\u003c\/p\u003e\u003cp\u003eEngineered as a bolt-on fitment with no modifications required. No ECU remap is needed, although a Stage 1 tune will further enhance performance. 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Engineered for the updated 2024-onwards GR Yaris, this 76mm (3\") stainless steel system bypasses the factory resonator for a louder, more uninhibited exhaust sound that makes the 1.6T feel every bit as dramatic as it looks.\u003c\/p\u003e\u003cp\u003eThe non-resonated configuration delivers a raw, characterful tone on acceleration with a satisfying bark on each upshift. This is the choice for drivers who want the maximum acoustic transformation from a filter-back system — a proper performance exhaust sound without the need for a full system replacement. Available in five tip finishes, including Brushed Titanium and Burnt Blue Titanium options available exclusively for the Gen 2.\u003c\/p\u003e\u003cp\u003eA bolt-on replacement for the factory exhaust system with no cutting, welding, or remapping required. 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Designed for non-OPF\/GPF F80 M3 models, this EC-approved system replaces the full cat-back section with high-quality 304L stainless steel pipework, delivering a refined yet noticeably more intense exhaust note across the entire rev range of the S55 twin-turbocharged inline-six.\u003c\/p\u003e\u003cp\u003eThe system is engineered to work with the OEM catalysts and downpipe, making it a genuine performance upgrade without requiring any additional modifications. A direct bolt-on fitment with no cutting or welding. Available in four tip finish options. No ECU remap required, though this system works perfectly in conjunction with a Stage 2 tune. Made at Milltek Sport's UK factory.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFitment: BMW M3 F80 (Non-OPF\/GPF models) 2014–2018\u003c\/li\u003e\n\u003cli\u003eE-marked: Yes (EC approved)\u003c\/li\u003e\n\u003cli\u003eTip options: Polished, Cerakote Black, Titanium, Carbon Fibre\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement — no remap required\u003c\/li\u003e\n\u003cli\u003eMade in the UK\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Carbon","offer_id":56776726806912,"sku":"SSXBM1062","price":2422.7,"currency_code":"GBP","in_stock":true},{"title":"Cerakote Black","offer_id":56776726839680,"sku":"SSXBM993","price":2368.07,"currency_code":"GBP","in_stock":true},{"title":"Polished","offer_id":56776726872448,"sku":"SSXBM992","price":2186.1,"currency_code":"GBP","in_stock":true},{"title":"Titanium","offer_id":56776726905216,"sku":"SSXBM994","price":2661.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/7557\/5573\/files\/Milltek_Cat_Back_Exhaust_System_for_BMW_F80_M3_-_Non_OPF_GPF_Model_-_Carbon_Tips_-_SSXBM1062.jpg?v=1761659991"},{"product_id":"milltek-cat-back-equal-length-loudest-exhaust-system-for-bmw-f80-m3-non-opf-gpf-model-copy","title":"Milltek Cat Back Equal Length (Loudest) Exhaust System for BMW F80 M3 - Non OPF\/GPF Model","description":"\u003cp\u003eExperience the raw sound of the BMW F80 M3 at its most dramatic with this Milltek Sport Equal Length Cat-Back Exhaust System. 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The non-resonated race configuration removes the factory resonator from the OPF\/GPF-back section, allowing a more dramatic, uninhibited exhaust note that suits spirited driving and track use.\u003c\/p\u003e\u003cp\u003eRetains the factory OPF\/GPF for emissions compliance, but maximises sound character from that point rearwards. A direct bolt-on replacement — no cutting or modifications required. Available in five tip finishes. 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This non-EC-approved race silencer is designed for performance driving and track use, producing a more uninhibited, aggressive exhaust note than the road variant — best suited to track days or spirited road use where volume is welcomed.\u003c\/p\u003e\u003cp\u003eA direct bolt-on replacement for the OEM rear box, the race rear silencer works with your existing front exhaust sections and catalysts. 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