![Epsilon+ Diffuser V1C+ for 17-20 Honda Civic Si Coupe [FC3]](http://www.twostepperformance.com/cdn/shop/files/FC3-01_ac00c9b8-48b8-4234-a3bf-ecb3813194c9.jpg?v=1765463395&width=1920)
![Epsilon+ Diffuser V1C+ for 17-20 Honda Civic Si Coupe [FC3]](http://www.twostepperformance.com/cdn/shop/files/FC3-01_ac00c9b8-48b8-4234-a3bf-ecb3813194c9_1024x.jpg?v=1765463395)
It’s round, it’s red, it’s got a cute face. Even Honda man would let it get to second base.
Install is pretty straightforward
Both the quality and fitment of the part are on par with what you would expect from this company.
NVH increase over the oem mount is barely noticeable, there is a very minor vibration that is felt at idle but once driving you dont feel it at all.
The engine feels much more stable under wot now and to top it off the part looks good too
Opting for the 2-step performance shipping protection was an absolute no-brainer. When investing in high-end components, the transit phase can often introduce unnecessary anxiety. This service effectively mitigates that risk, offering complete peace of mind and transforming what is usually a stressful waiting period into a seamless, secure experience.
I ordered the red one for the 11th gen Civic SI. Well packaged and came with a Wunderladen sticker. This is a big upgrade over the cheap plastic orange dipstick that came with the car. Its worth the money to be able to reliably read your oil level, especially on a direct injected turbo car.