Milltek Sport Large-Bore Downpipe & Hi-Flow Sports Cat for BMW i8 1.5T Hybrid (20142021) - T304 Stainless - Adds Active Sound V2 to OE Sound Generator - Performance Exhaust Upgrade - SSXBM1151

SSXBM1151 Milltek Sport Front Section with Performance Catalytic Converter for BMW i8 1.5T Hybrid 2014 to 2021

Transform the way your BMW i8 responds and sounds with Milltek Sport’s T304 stainless front section and high-flow catalytic converter, part number SSXBM1151. Purpose built for the 2014 to 2021 1.5 turbo hybrid, this performance-focused assembly improves exhaust gas velocity, sharpens throttle feel and delivers a deeper, richer soundtrack. It also enables Active Sound V2 through the factory sound generator for a more immersive in-cabin experience.

Key reasons enthusiasts choose SSXBM1151

• Made in the UK from premium 304-grade stainless steel for long-term durability and corrosion resistance.
• Enlarged diameter, mandrel-formed tubing to reduce back pressure and support better turbo efficiency.
• High-flow performance catalyst to increase efficiency while preserving drivability and refinement.
• Acoustically developed for a mature, sporty tone without intrusive drone on the motorway.
• Integrates Active Sound V2 via the original sound module for an enhanced cabin note.

What you will notice

• More urgent response from low rpm and improved mid-range pull.
• A cleaner, more motorsport-inspired note under load with a refined character at cruise.
• Confidence-inspiring build quality and a fit that feels truly OEM plus.

Construction and engineering

• T304 stainless steel throughout for strength and heat resistance.
• Mandrel bends maintain consistent internal diameter for optimised gas flow.
• Precision welds and a design that pairs seamlessly with the factory system.

Fitment and details

• Vehicle compatibility: BMW i8 1.5T Hybrid 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021.
• Product type: Front exhaust section with performance catalytic converter and Active Sound V2 integration.
• Material: T304 stainless steel.
• Part number: SSXBM1151.

Proven by us and loved by our customers

We have installed this Milltek Sport setup on our own builds and client cars. Feedback is consistently positive, with owners praising the sharper response, premium tone and superb finish. It is a go-to upgrade for BMW i8 enthusiasts who want quality, sound and performance in one package.

Professional installation available

For fitting and setup, book with MJ Modifications in Warwickshire. Our team knows the i8 platform and Milltek hardware inside out. Request a fitting quote at info@mjmodifications.co.uk.

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