Valvetronic Designs X-Pipe Question

[cooll_m3]

Originally Posted by Andreweatstacos

Honestly with test pipes and modded oem muffler on my E90 I don't smell anything. I am also recommending just test pipes. They add to the volume, but keep the smell at bay.

I'm looking at the Bomiz 304 Valved Axleback just so I have an option to make it quieter. OP does your Bomiz system have vacuum or electronic valves?

They are electronic valves and I really enjoy being able to quiet it down. Even when I had the full catless system the noise difference was insane. I could very comfortably drive the car at midnight through neighborhood areas without attracting attention. I will say though, I don't know if this has changed, but my Bomiz system took 6 months to come and was 3 months late, so just throwing it out there.

[Tragiclil]

Trying to give Valvetronic HFC x-pipe a chance mentally. But this keeps putting me off…

https://urldefense.proofpoint.com/v2...0TvYNBDNxgA&e=

[Trinh_7]

I would stay away from those Chinese cats, as they don't work. Someone sold me that xpipe couple years back. Best option is to build your own xpipe using Gesi cats, if you can swing it, go with HJS cats (very hard to source). The cheapest Gesi 10025 would get rid of 80% of the smell and they flow very well.

https://www.m3post.com/forums/showthread.php?t=2125465

[Tragiclil]

Originally Posted by Trinh_7

I would stay away from those Chinese cats, as they don't work. Someone sold me that xpipe couple years back. Best option is to build your own xpipe using Gesi cats, if you can swing it, go with HJS cats (very hard to source). The cheapest Gesi 10025 would get rid of 80% of the smell and they flow very well.

https://www.m3post.com/forums/showthread.php?t=2125465

Oh man, can we reverse time where you sell me your old x-pipe?!? JK. Ya, it’s a pain going that route for the extra work of welding.