Downpipe with a sports catalyst from HJS dedicated to: BMW M135i F20/F21, 335i F30/F31
This product is made of stainless steel and is perfectly matched to your vehicle.
By installing this downpipe, a noticeable increase in performance and improved throttle response can be observed.
The crucial significance of this product also lies in reducing exhaust gas temperatures and relieving the turbocharger.
