{"product_id":"hkstudie-exhaust-system-bmw-m3-m4-g80-g81-g82-comp","title":"HKSTUDIE Exhaust System - BMW M3\/M4 G80\/G81\/G82 Competition","description":"\u003cp\u003eUpgrade your G80\/G81\/G82 M3\/M4 Competition with the HKSTUDIE EX001 — Japanese-crafted stainless steel exhaust system that blends refined cruiser tone with real performance gains. Compatible with S58B30A engine (2021-on) for 2WD and 4WD models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment \u0026amp; Application\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned exclusively for the BMW M3\/M4 G80, G81, G82 Competition models (engine S58B30A, from 2021 onwards).\u003c\/li\u003e\n\u003cli\u003eCode: HKSTUDIE-EX001. \u003c\/li\u003e\n\u003cli\u003eQuad-exit tail tips, SUS304 construction, minimum ground clearance ~135 mm at mid-pipe. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePerformance \u0026amp; Engineering Highlights\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExhaust flow resistance is claimed to be \u003cem\u003eup to 35% lower\u003c\/em\u003e compared with OEM layout thanks to optimized pipe routing and the removal of the centre-resonator. \u003c\/li\u003e\n\u003cli\u003eIn internal testing on a stock vehicle, HKSTUDIE measured a gain of up to +5 kW (≈+6.7 hp) and +15 Nm torque over OEM when the system is fitted. \u003c\/li\u003e\n\u003cli\u003eSound tuning is grounded in frequency-analysis: unwanted low-frequency drone (below ~100 Hz) is suppressed, while the more sporty mid-frequency (200 Hz+) exhaust tone is emphasised.\u003c\/li\u003e\n\u003cli\u003eDespite the aggressive design, the system is certified under UN-ECE R51.03 Phase 2 noise regulation (Japan) — making it suitable for everyday driving and compliant with inspection regimes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eDesign \u0026amp; Visuals\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTail tip styling takes cues from the legendary BMW 3.0 CSL – thick-walled slash-cut quad tips with blasted finish and internal sound-insulating slits for premium aesthetic and acoustics. \u003c\/li\u003e\n\u003cli\u003eFull system manufactured in-house in Japan, with precise TIG welding by experienced “takumi” craftsmen for durability and fit\/finish excellence. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Warranty\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBolt-on installation (no structural modifications implied) – though you may wish to check compatibility with local regulations and any ECU tune interplay.\u003c\/li\u003e\n\u003cli\u003e2-year \/ 30,000 km product warranty from date of purchase. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy choose HKSTUDIE EX001 for your M3\/M4 Competition?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eReal measurable performance improvement without major engine changes — ideal for both road-use and spirited driving.\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePremium build quality using SUS304 stainless steel, extensive development and Japanese craftsmanship.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThoughtful acoustical tuning: you get the aggressive sporty note when you want it, yet avoid unwanted cabin drone during cruising.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVisual upgrade at the rear — quad tips and premium finish elevate your M’s aesthetics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRegulatory compliance for many markets (including Japan) means peace of mind for daily use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMaterial: SUS304 stainless steel \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTail tip outer diameter: Ø101.6 mm (quad exit) \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlow improvement: up to ~35% lower exhaust resistance vs OEM. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower gain: up to +5 kW; torque +15 Nm (per manufacturer internal testing).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGround clearance (lowest part): approx. 135 mm at #2 mid-pipe. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNoise level (near-field): HKSTUDIE system ~97 dB vs OEM ~94 dB in testing. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eImportant notes \u0026amp; fitment tips\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure you specify your exact model, engine code and drivetrain (2WD vs 4WD) when ordering — this system is engineered for the Competition variant (375 kW \/ 510 PS) of the G80\/G81\/G82. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSome markets may have additional noise\/emissions regulations. While R51.03 Phase 2 compliant in Japan, please check local compliance requirements, especially for registration\/inspection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIf you run additional tuning (flash, downpipes, etc) or aftermarket mid-pipes, you may amplify performance gains beyond the quoted figures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUpon installation, check for clearance (especially if you’ve lowered the vehicle) and monitor for any difference in cabin levels or drone — though HKSTUDIE have engineered to minimise drone.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePeriodically inspect welds and tail tips for finish, especially if in harsh environments (salt, high humidity) — though SUS304 helps with corrosion resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HKSTUDIE","offers":[{"title":"Default Title","offer_id":47048681783522,"sku":"HKSTUDIE-EX001","price":11499.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/6550\/8578\/files\/HKSTUDIE-EX001-4-1024x683.jpg?v=1763512098","url":"https:\/\/shop.revzone.com.au\/products\/hkstudie-exhaust-system-bmw-m3-m4-g80-g81-g82-comp","provider":"Revzone Store","version":"1.0","type":"link"}