Stone Exhaust BMW N13 F20 F30 Catless Downpipes for 116i, 118i, 120i and 316i
Unlock faster spool, stronger mid-range and a sharper exhaust note with the Stone Exhaust BMW N13 catless downpipe upgrade. Engineered for the 1 Series F20 F21 116i 118i 120i and 3 Series F30 F31 316i, this de-cat downpipe is a direct-fit, OEM-spec solution designed to reduce back pressure and maximise exhaust gas flow on the N13 turbo engine. If you are searching for BMW N13 downpipe, BMW 116i downpipe, 118i decat, 120i catless downpipe or 316i F30 downpipe, this is the performance exhaust upgrade enthusiasts choose.
Why choose the Stone Exhaust N13 catless downpipe
- Catless downpipe for BMW N13 1 Series and 3 Series models including 116i, 118i, 120i and 316i
- Unique flex section helps manage thermal stress and reduces risk of cracking
- Crisscross welding strengthens the turbo flange for durability under heat cycles
- One-piece bend design for smooth, uninterrupted exhaust flow
- Machine welding for consistent penetration and clean internal finishes
- 3D scanning and reverse engineering for precision fit and optimised routing
- Direct spot welding by mechanical arms for accuracy and strength
- 100% OEM fitment for straightforward, bolt-on installation to the N13 turbo system
Engineered for flow, reliability and fitment
Stone Exhaust develops each BMW N13 downpipe using reverse-engineered OEM data captured via 3D scanning. Engineers analyse pipe diameter, routing and bend angles, then simulate exhaust gas flow, temperature and pressure zones to refine performance. Production uses a 7 axis CNC bending machine to achieve an industry-leading 98% roundness and control outer bore wear to only 25% at 180°. Combined with crisscross and overlapping weld techniques at the turbo flange and precise direct spot welding, the result is a high-flow de-cat downpipe with excellent durability and repeatable fit.
Real-world results our customers love
We have fitted these Stone Exhaust N13 catless downpipes on customer cars and our own builds. Feedback has been consistently positive on fitment quality, throttle response and the more purposeful exhaust tone. If you want a BMW F20 F21 F30 F31 N13 downpipe that installs cleanly and delivers the response you are after, this is a proven upgrade.
Compatibility
Engine: BMW N13
BMW 1 Series
- F20 116i / 118i / 120i (2010+)
- F21 116i (2011+) / 118i / 120i (2012+)
BMW 3 Series
- F30 316i (2012+)
- F30 LCI 316i (2015+)
- F31 316i (2011+)
Part number
A213P
Manufacturer and warranty
Manufactured by: Stone Exhaust
Warranty: Stone Exhaust 2 Year Warranty
Professional fitting
We offer professional fitting at Nforcd in Warwickshire. For an installation quote on your BMW N13 F20 F21 F30 F31 116i 118i 120i 316i catless downpipe, email Sales@nforcd.com.
Important note
Catless downpipes are intended for off-road or motorsport use where permitted. Check local laws before purchase and installation.
Search-friendly terms
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