Milltek Non-Resonated GPF-Back Exhaust - Ineos Grenadier B58 - Polished Tips - SSXINE101

Milltek Non-Resonated Gasoline Particulate Filter-Back Exhaust System for Ineos Grenadier with B58 engine. OEM particulate filter requires cutting for installation.

The Grenadier is engineered for off-road capability and utility, but the factory exhaust dampens both engine note and road performance. This non-resonated system unlocks the B58's potential, delivering a purposeful tone while improving throttle response and driving dynamics. Hand-finished T304L stainless steel construction with mandrel-bent piping and polished exit tips.

Particulate filters (GPF/OPF) have been standard on many Euro-spec engines since late 2018 to meet emissions regulations. These filters significantly reduce exhaust sound and restrict flow. Milltek's GPF-back design compensates for this acoustic suppression, restoring full-throttle character while maintaining OEM emissions compliance for street use.

• Direct fitment: Ineos Grenadier (all B58-equipped models)
• T304L stainless steel, hand-finished construction
• Mandrel-bent piping for optimal flow dynamics
• Polished stainless tips
• Non-resonated design for open-track character (street legal where permitted)
• OEM hangers used; no modification required except particulate filter removal

Milltek exhausts are manufactured to exacting standards using precision stainless steel engineering, not mass-produced universal systems.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 76.2mm (3.00")
• Fitting time: 1.5 to 2 hours, including removing the factory system

Fitment

• INEOS > Grenadier > B58 3.0 I6 Turbo Petrol > 2023 and Later

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.