MagnaFlow 19390 vs 19131: Cat-Back Sound Comparison
By MagnaFlow Exhaust, Mufflers & Cat Converters - Quality | Published: 2026-10-25
Category: Comparisons
Compare the MagnaFlow 19390 for the Audi A5 Sportback and the 19131 Street Series for the Mazda 6. Learn how each cat-back exhaust system delivers a distinct performance tone and fit.
Quick answer
Choose the MagnaFlow 19390 for a more aggressive, sporty tone on your 2018-2019 Audi A5 Sportback 2.0L, or the 19131 Street Series for a powerful, resonant sound on your 2014-2017 Mazda 6 2.5L. Your vehicle determines the best fit.
Why the sound character differs
Both systems use mandrel-bent tubing and straight-through mufflers to improve flow and volume, but the engine and chassis they're designed for change the final note. The 19390 for the Audi A5 Sportback uses 3-inch main piping, which supports a deeper, more aggressive exhaust note that complements the turbocharged 2.0L engine. The 19131 Street Series for the Mazda 6 uses 2.5-inch piping and two straight-through mufflers to produce MagnaFlow's signature resonant, powerful tone without being overwhelming.
What you give up with each choice
The 19390's larger 3-inch piping and aggressive character may be too loud or droning for daily commuters who prefer a quieter cabin. The 19131 Street Series, while still noticeably louder than stock, is tuned for a balanced sound that suits the Mazda 6's four-cylinder character but won't satisfy those seeking a raw, race-inspired note. Neither system is a direct swap; each is vehicle-specific, so your car model decides the available options.
How to choose between the 19390 and 19131
- Sound profile: The 19390 delivers an aggressive, sporty tone suited to the Audi A5 Sportback's turbo 2.0L. The 19131 Street Series offers a resonant, powerful sound that's more refined for the Mazda 6's 2.5L.
- Exhaust volume: The 19390's 3-inch piping creates a louder, more pronounced exhaust note. The 19131's 2.5-inch piping provides a noticeable upgrade over stock without being overwhelming.
- Vehicle fitment: The 19390 fits 2018-2019 Audi A5 Sportback 2.0L models only. The 19131 fits 2014-2017 Mazda 6 2.5L models only. There is no cross-compatibility. Confirm your vehicle's year and engine before purchasing.
Product facts at a glance
- MagnaFlow 2014-2017 Mazda 6 2.5L Street Series Cat-Back Performance Exhaust System 19131: The MagnaFlow Mazda 6 Street Series Cat-Back uses 2.5-inch mandrel-bent main piping and two straight-through mufflers with dual 4.5-inch polished tips. This combination delivers a resonant, powerful tone that enhances the 2.5L engine's personality without being overly loud.
MagnaFlow 2014-2017 Mazda 6 2.5L Street Series Cat-Back Performance Exhaust System 19131 - MagnaFlow 2018-2019 Audi A5 Sportback 2.0L Sport Series Cat-Back Performance Exhaust System 19390: The MagnaFlow Audi A5 Sportback Sport Series Cat-Back uses 3-inch mandrel-bent main piping and two straight-through mufflers with dual 4.5-inch polished tips. The larger piping and straight-through design produce a more aggressive, sporty exhaust note that helps the Audi stand out.
MagnaFlow 2018-2019 Audi A5 Sportback 2.0L Sport Series Cat-Back Performance Exhaust System 19390
Which exhaust is right for you?
Best for
- Audi A5 Sportback owners wanting an aggressive, sporty exhaust note
- Mazda 6 owners seeking a resonant, powerful tone without excessive volume
Not ideal for
- Drivers of other vehicle models or years not listed
- Those wanting a completely quiet exhaust or a raw race-car sound
