Milltek Large Bore Downpipe and Hi-Flow Sports Cat for BMW i8 1.5T Hybrid 2014 to 2021 — SSXBM1151
Unlock the performance and sound your BMW i8 deserves with the Milltek Large Bore Downpipe and Hi-Flow Sports Cat, part number SSXBM1151. Engineered specifically for the BMW i8 1.5T Hybrid model years 2014 to 2021, this premium performance exhaust upgrade delivers improved gas flow, sharper throttle response and a deeper, sportier tone. It also adds Milltek Sport Active Sound V2 to the OE sound generator for a richer, more engaging soundtrack inside the cabin.
Why choose Milltek for your BMW i8 downpipe and sports cat
- Designed, developed and hand finished in the UK by time-served craftsmen.
- Aerospace grade type 304 stainless steel throughout — non-magnetic, highly resistant to corrosion and discolouration.
- Large bore, mandrel-bent pipework for optimised gas flow and reduced back pressure.
- Hi-flow sports catalyst for improved exhaust efficiency while maintaining drivability.
- Comprehensive acoustic development for a crisp, sporty exhaust note without unwanted drone or cabin resonance.
Key benefits and search-friendly highlights
- BMW i8 downpipe upgrade for 2014, 2015, 2016, 2017, 2018, 2019, 2020 and 2021 1.5T Hybrid models.
- Milltek Large Bore Downpipe and High Flow Sports Cat for BMW i8.
- Performance exhaust upgrade for BMW i8 turbo — improved flow and response.
- Stainless steel T304 BMW i8 sports cat and downpipe — durable, UK made.
- Adds Milltek Sport Active Sound V2 to OE sound generator for enhanced cabin sound.
- Mandrel bent i8 down pipe with enlarged bore for maximum efficiency.
- Direct performance enhancement potential with a refined, motorsport inspired tone.
- Milltek part number SSXBM1151 — exact fitment for BMW i8 1.5T Hybrid.
What you will feel and hear
This Milltek downpipe and hi-flow sports catalyst combination frees up the i8’s turbocharged 1.5T engine, reducing restriction to help the car breathe more efficiently. Expect a keener throttle response, stronger pull through the revs and a more characterful, performance-oriented soundtrack. Inside the cabin, the integration that adds Milltek Sport Active Sound V2 to the OE sound generator provides a deeper, more engaging note that complements the upgraded hardware.
Craftsmanship you can trust
Milltek’s use of type 304 stainless steel, precise mandrel bending and careful enlargement over stock diameters ensure optimised flow without sacrificing mid-range torque. The system undergoes rigorous acoustic development to deliver a tone that is sporty and crisp, without NVH, drone or unwanted resonance — exactly what you want from a premium BMW i8 exhaust upgrade.
Fitment and part details
- Vehicle: BMW i8 1.5T Hybrid
- Years: 2014 to 2021
- Product: Milltek Large Bore Downpipe and Hi-Flow Sports Cat
- Integration: Adds Milltek Sport Active Sound V2 to OE sound generator
- Material: Type 304 stainless steel
- Part Number: SSXBM1151
Proven by us and loved by our customers
We have fitted and used Milltek BMW i8 downpipes and sports cats for our own builds and customer cars, and feedback has been consistently positive. Customers praise the improved response, refined sound quality and long-term durability — exactly what you want from a performance exhaust upgrade for the i8.
Professional fitting available
For expert installation and advice, we recommend having this kit fitted by us at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com and our team will be happy to help.
Upgrade your BMW i8 with the Milltek Large Bore Downpipe and Hi-Flow Sports Cat SSXBM1151 — the performance exhaust solution for improved flow, sound and driving excitement.
Note: This is a performance part. Please check local regulations for road use in your region.