Stone Exhaust BMW S55 F80 F82 OEM Integrated Valve Catback Exhaust System for M3 and M4 - Part Number AP507
Upgrade your BMW M3 M4 with the Stone Exhaust OEM Integrated Valve Catback Exhaust System for the S55 engine. This catback exhaust is engineered specifically for the F80 M3 and F82 M4, delivering a deep, motorsport-inspired sound with the convenience of OEM valve control. If you are searching for BMW M3 exhaust, BMW M4 exhaust, S55 exhaust, F80 exhaust, F82 exhaust, valved catback exhaust, BMW M3 M4 performance exhaust, or OEM valve cat-back system, this is the premium solution that combines precise fitment, power gains and everyday usability.
Designed through 3D scanning and reverse engineering of the factory system, the Stone cat-back ensures 100 percent OEM fitment, seamless installation and no compromise on quality. The OEM Integrated Valves mean your factory ECU controls the valves automatically, keeping cold start, comfort and sport modes exactly as BMW intended while unleashing a more aggressive tone when you want it.
At Nforcd we have fitted and tested this Stone Exhaust on S55 cars and the results speak for themselves. Customers love the sound quality, no-drone cruising, the flawless fit and the noticeable performance improvement.
Why choose the Stone Exhaust M3 M4 S55 catback
- BMW M3 M4 S55 catback exhaust - valved, OEM integrated valve control, ECU operated
- Enhanced tone - deep, refined and aggressive under load with excellent daily drivability
- Eliminates the drone commonly found on standard systems
- One piece design with machine welding for strength and durability
- Developed with 3D scanning and reverse engineering for true OEM fitment
- Dyno developed in house for real performance gains
- Optional Stone Valvetronic System available for remote valve control via plug and play OBDII controller
- In house R and D, precision manufacturing and premium finish
Proven performance
- Power gain: +12.2 PS at 6800 rpm
- Torque gain: +9.8 Nm plus 7.2 ft lb at 2500 rpm
OPF delete ready
Running an OPF car. Stone offers an OPF delete function that can be included free of charge. This allows you to install the Stone cat-back on OPF equipped vehicles without triggering error codes, so ECU coding for OPF is not required.
Engineering that makes a difference
Stone Exhaust engineers begin with 3D scanning of OEM parts to analyse pipe diameter, routing and bend angles, then refine flow with advanced simulation to optimise gas velocity, thermal management and backpressure. The 7 axis CNC bending process achieves up to 98 percent roundness and exceptional accuracy to reduce turbulence and prevent weld stress. Crisscross and overlapping welding increases penetration at high temperature joints for long term reliability, while direct spot welding by mechanical arms delivers consistent, precise welds.
Popular pairing - unleash full S55 potential
This catback exhaust is often purchased with the Stone Exhaust BMW S55 F80 F82 F87 Catless Downpipe for M2 Competition, M3 and M4. Add the optional Stone Valvetronic System to control valves remotely via the Stone controller for maximum flexibility.
Required additional parts for installation
Please note: you will require the following additional parts to fit this exhaust:
- 2x Genuine BMW S55 Downpipe Gasket - Exhaust Side for M2 Competition, M3 and M4
- 4x Genuine BMW F10 F80 F87 G15 Catalytic Exhaust Centre Collar Nut - M8 including M550iX, 760i, M850iX and M6
Compatibility
S55 engine - BMW M Series:
- F80 M3 Saloon 2012 to 2015
- F80 LCI M3 Saloon 2015 to 2018
- F82 M4 Coupe 2013 to 2017
- F82 LCI M4 Coupe 2016 to 2018
Fitting and installation
For professional fitting we recommend Nforcd in Warwickshire. Request an installation quote via Sales@nforcd.com and our team will be happy to help.
Part number
AP507
Manufacturer and warranty
Manufactured by Stone Exhaust with a 2 year Stone Exhaust warranty.
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