Stone Exhaust Catless/Decat Downpipe BMW B48 G20 G21 G30 G31 G01 G02 G29 G32 G11 (320i 330i 520i 530i X3/X4 20i 30i xDrive Z4 20i/30i 630i 730i) - A216P

BMW B48 2.0T Race Front Pipe - Fits G20 G21 G30 G31 G01 G02 G29 G32 G11 - Part A216P

Unleash your B48-powered BMW with this Stone Exhaust de-cat front section, part number A216P. Engineered for serious enthusiasts, this straight-through turbo outlet transforms throttle response, reduces back pressure and delivers a sharper, more purposeful soundtrack from your 2.0 turbo. Ideal for drivers seeking a high-flow primary pipe upgrade for road-legal track days and off-road use in the UK.

We have installed this on customer cars and our own builds at MJ Modifications. Fitment is precise, the craftsmanship is superb and feedback on sound and drivability has been consistently excellent. If you want an instant performance feel without compromises in fit, this B48 race pipe is the one to choose.

Why this B48 performance front pipe stands out

• Maximised gas flow for quicker spool, stronger mid-range and a more engaging exhaust note
• One-piece mandrel-bent construction for smooth internal radius and minimal turbulence
• 3D scanning and reverse engineering of OE parts for an OEM-like install
• 7-axis CNC precision bending for exceptional roundness and accuracy
• Reinforced turbo flange with meticulous overlapping welds for durability at high temperatures
• Consistent weld penetration via controlled robotic processes for long-term reliability
• Designed, tested and quality checked by Stone Exhaust for repeatable results

Vehicle fitment - B48 2.0 turbo applications

3 Series

• G20 320i, 330i
• G21 320i, 330i, 330i xDrive

5 Series

• G30 520i, 530i, 530i xDrive
• G31 520i, 530i, 530i xDrive

6 Series

• G32 630i Gran Turismo

7 Series

• G11 730i

X Series

• G01 X3 20i xDrive, 30i xDrive
• G02 X4 20i xDrive, 30i xDrive

Z Series

• G29 Z4 20i, 30i

Engineering highlights

• 3D flow modelling to optimise gas speed, pressure and heat distribution for the B48 turbine
• Reduced weld count and smooth routing to avoid hotspots and flow separation
• Dimensional accuracy targeted to a fine tolerance for repeatable, hassle-free installation
• High-strength weld strategy around the turbo connection for endurance under extreme thermal cycles

Installation and fitting

Professional fitting recommended. MJ Modifications in Warwickshire can install this component and provide a tailored quote. Email info@mjmodifications.co.uk to book or to check availability.

Part number

A216P

Warranty

Stone Exhaust 2 Year Warranty

Usage and emissions notice

This is a de-cat product intended for off-road and track environments where permitted. Regulations differ by region regarding catalytic converter removal or modification. Please verify and comply with local laws before purchase and installation. Engine calibration may be required on some vehicles.

Why buy from MJ Modifications

UK specialists for performance upgrades with in-house fitting, hands-on experience and genuine product knowledge. We have used this Stone Exhaust B48 race front pipe ourselves and our customers rate the fit, finish and results highly. Buy with confidence for your 320i, 330i, 520i, 530i, X3 30i, X4 30i, Z4 30i, 630i or 730i.

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