BMW 335i/135i Catless Downpipes 2007-2010 (N54 E90) | WSTN Performance

More flow, more sound, a true bolt-on for your N54.Catless downpipes are the single highest-impact exhaust upgrade on the N54. Removing the factory catalytic converters clears the biggest restriction in the system, frees up flow off both turbos, and lets the twin-turbo straight-six breathe the way it was meant to. Built to order, quality checked in Perth, dispatched worldwide.Made from T304 stainless steel with mandrel-bent piping and factory-spec flanges, it is a direct bolt-on for both RHD and LHD cars. No cutting, no welding, fits first time.Why upgrade?Clears the biggest restriction: removing the OEM cats is the most effective exhaust change you can make on the N54.Sharper throttle response: less backpressure off the turbos for a more immediate, free-revving feel.Unmistakable turbo note: opens up the N54's true exhaust character without restriction.Tune-ready: pairs with an ECU tune to let your software deliver its full potential.Built to last: mandrel-bent T304 stainless steel, made to handle sustained heat.RHD and LHD compatible: a direct fit for both right- and left-hand-drive cars.Fitment and compatibilityFits both RHD and LHD vehicles. Compatible BMW N54 models:BMW 1 Series: 135i E82 / 135i E88BMW 3 Series: 335i E90 Sedan / 335i E92 Coupe / 335i E93 ConvertibleEngine: BMW N54, 3.0L twin-turbo inline-6Not sure if this fits your build? Send us your year, model and engine code before ordering and we'll confirm fitment.What's in the box2 x N54 catless downpipes2 x gasketsAll mounting hardwareInstallationDifficulty: 3/5, direct OEM replacement onto factory mounting points.Time estimate: 1-2 hours with basic tools.Mounting: no cutting, welding or custom fabrication required.We recommend a professional install or an experienced home mechanic.Warranty / ShippingDISCLAIMERWSTN Performance components are designed for track and competition use. To protect your build and ensure a perfect finish, we recommend professional installation by a certified specialist/workshop. It is the buyer's responsibility to ensure modifications comply with local regulations.WARRANTYWe stand behind every product we sell. All WSTN Performance products carry a 1 year WSTN Performance warranty as standard. This covers any manufacturing defects, giving you total peace of mind that your upgrade is built to last. View our full Warranty policy page here.SHIPPINGWe offer tracked worldwide shipping on our entire catalogue. Most of our products are built to order, personally quality-checked in Perth WA, and dispatched worldwide. In-stock items dispatch within 2-4 days. All items arrive with full tracking. View our full Shipping policy page here.RETURNSWe offer returns on all products if items are damaged or there is something wrong. If we ever make a mistake, we'll cover the return shipping to make it right. View our full Return policy page here.SUPPORTNeed a hand with fitment, shipping, or a return? Our Perth-based team is here to help you get your build perfect. Email: contact@wstnperformance.comSound Clip