Milltek Sport BMW M135i F70 - GPF/OPF Bypass - Fits Milltek OPF Back System (SSXBM1421)

As the GPF/OPF almost acts as a secondary catalyst, we have provided the option to remove this component, similar to a Decat system. This bypass deletes the GPF/OPF, removing it from the exhaust system to better improve performance.

All our performance exhaust systems are designed with you in mind, and we cater to an ever-expanding range of vehicles. We believe in continuous evolution, and our research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements. All of our products are made in the UK and distributed to more than 90 countries worldwide, making Milltek Sport one of the most accessible performance aftermarket brands on the market.

Vehicle fitment (Milltek Sport)

• BMW 1 Series M135i X Drive 5 Door (F70 OPF/GPF Equipped)

TÜV / ABE available upon request

We currently ship within Europe only.

If a part is not available, we will contact you with an estimated wait time.

If you wish to return a product after receiving it, we offer a 14-day returns policy. Custom-made products are not eligible for return, and return shipping is at the customer's expense. Full delivery and returns terms are on the “Delivery Information” page — the link is at the bottom of the page.

Products come with a warranty, detailed in a certificate included in the box.

To make a valid claim, you must prove the damage was not caused by you and that the warranty certificate is valid.

Full terms are on the “Terms & Conditions” page — the link is at the bottom of the page.