Milltek Sport OPF/GPF-Back Performance Exhaust with GT-115 Polished Trims for BMW M135i xDrive F40 (5-Door, 2019+) – Particulate Filter-Back T304 Stainless Steel

Milltek Sport OPF/GPF-Back Performance Exhaust with GT-115 Polished Trims for BMW M135i xDrive F40 (5-Door, 2019+) – Particulate Filter-Back T304 Stainless Steel

£1,047.98
£1,047.98
Sold out
Tax included. Shipping calculated at checkout.

Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Upgrade your BMW M135i xDrive F40 (2019 onwards, OPF/GPF equipped) with the Milltek Particulate Filter-back exhaust system featuring GT-115 polished trims. This Milltek OPF-back and GPF-back performance exhaust is designed, developed and hand-finished in the UK using aerospace grade type 304 non-magnetic stainless steel for exceptional durability, corrosion resistance and long-lasting shine. It is the ideal M135i exhaust upgrade if you want a deeper, sportier tone and improved gas flow while retaining your factory OPF/GPF.

Crafted by time-served UK craftsmen, every section of pipework and silencer uses high-quality T304 stainless steel. Mandrel bending ensures constant radius bends for optimised gas flow, and carefully enlarged bore diameters over stock help deliver performance gains without sacrificing drivability or mid-range torque. Milltek’s acoustic development produces a crisp, sporty exhaust note with no unwanted NVH, no drone and no intrusive cabin resonance, making it perfect for daily road use and spirited driving.

The GT-115 polished trims complete the rear of the M135i with a premium, motorsport-inspired finish. If you are searching for an M135i F40 exhaust that looks right, sounds right and is built to last, this Milltek particulate filter-back system is the proven choice.

Why choose this Milltek OPF/GPF-back for your BMW M135i xDrive F40

  • UK-made aerospace grade type 304 non-magnetic stainless steel construction
  • OPF-back and GPF-back design retains the factory particulate filter
  • Mandrel-bent pipework for optimised gas flow and response
  • Comprehensive acoustic tuning for a sporty, refined sound with no drone
  • GT-115 polished trims for a high-quality, OEM-plus appearance
  • Durable, corrosion-resistant materials for long service life

Fitment

BMW M135i xDrive 5 Door (F40) with OPF/GPF, 2019 onwards.

Nforcd recommendation

We run Milltek exhausts on our own cars and our customers consistently rate the build quality, fit and sound highly. If you want an M135i F40 exhaust upgrade that enhances tone, looks and flow while keeping everyday refinement, this is the one we recommend.

Professional fitting

Nforcd offers professional installation at our Warwickshire workshop. Request a fitting quote: Sales@nforcd.com.

Popular search terms

Milltek M135i exhaust, BMW M135i xDrive F40 exhaust, M135i OPF back exhaust, M135i GPF back exhaust, particulate filter back exhaust M135i, Milltek GT-115 polished trims, BMW M135i 2019 exhaust upgrade, Milltek Sport M135i F40, stainless steel performance exhaust, M135i F40 OPF GPF exhaust system, BMW M135i tailpipe upgrade, drone-free exhaust M135i, UK-made M135i exhaust.