Milltek GPF/OPF Bypass - Ineos Grenadier B58 - SSXINE145

Milltek GPF/OPF Bypass for the Ineos Grenadier B58

Replaces the particulate filter section on the Grenadier B58 with a straight T304L bypass, removing its restriction and sharpening the exhaust note. Fits the OE or Milltek downpipe and any OE or Milltek cat-back or OPF/GPF-back.

Key Features

• Straight Bypass: 3.54in (90.00mm) T304L bypass pipe plus connecting pipe.
• Fits OE and Milltek: works with OE or Milltek downpipes and cat-back or OPF/GPF-back systems.
• Tune Required: Stage 2 ECU tune required.
• For closed-course and competition use only.

Technical Specifications

• Pipe Diameter: 3.54in (90.00mm)
• Material: T304L Stainless Steel
• Parts: GPF/OPF bypass pipe, bypass connecting pipe
• Requires: Stage 2 ECU tune
• Fitting Time: 1.50 to 2.00 hours

Compatibility

• 2023 and later Ineos Grenadier B58 3.0 I6 Turbo Petrol

Why Choose Milltek?

Engineered for the Emotion.

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

Specifications

• Pipe diameter: 90mm (3.54")
• Fitting time: 1.5 to 2 hours, including removing the factory system
• Off-road / competition use only. Not legal for use on public roads in the US.

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.