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Exhaust help/leak (xforce varex catback)

izkray

izkray

New member
Location
NorCal
I got the xforce catback and it sounds like I have a crazy leak. All connections are tight. After some research on here, I replaced the band clamp that goes between catback and downpipe but that didn't do anything for me. All I can think of is maybe I got a faulty muffler. Maybe the valves don't open all the way but I'm pretty sure it shouldn't sound like this. Here's a little video of what it sounds like. Only happens under heavy throttle
Thanks for your time!
 
D

Desslok

Autocross Champion
Location
PA
Car(s)
2019 Rabbit
Yikes! Last time I heard a sound like that, it came from a bunch of feminist protesters. Got to be something wrong with the muffler.
 
O

Ottawarabbit

New member
Location
Ottawa
I literally just installed my cat back too and have the exact same noise. Did you install the valve control box? I did a home install and need help on how to run the wires.
 
jimlloyd40

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
It's one of those could have had a V8 moments. (V8 vegetable juice I mean) in this case could have a Baun Performance exhaust.
 
O

OrthY

New member
Location
MA
Car(s)
GTI MK7
I have exact same sound. However, there is no leak sign on my exhaust. I think the sound is coming from gap between valve and muffler.
 
GTI Jake

GTI Jake

Autocross Champion
Location
Charlotte, NC
OrthY said:
I have exact same sound. However, there is no leak sign on my exhaust. I think the sound is coming from gap between valve and muffler.
Click to expand...

From what I’ve heard they use a plastic valve, which melts and blocks the gas path.

For every “looking for an X force” thread there’s two about them being junk.
 
xXDavidCXx

xXDavidCXx

Autocross Champion
Location
AZ
Car(s)
2017 GTI SE DSG
The "open" part of the video sounds like mine, but when in the closed position. I find the closed position sound to be awful when under load.

Some times I find the valve becomes un-synced with the control box. I have app controlled extra box. I get an un-synced if I turn off the car and then start my car within a few minutes. Another restart fixes the issue.

@izkray, are you still having the issue, does it happen every time?
 
izkray

izkray

New member
Location
NorCal
I'm really sorry guys! I always forget to check the forum.

I'll try to keep this short and explain my experience.
I got the varex remote valved system (non-bluetooth one)
Apparently I got a faulty valve system from the factory. I purchased the catback from MAPerformance and they contacted Xforce about warranty replacement. Naturally they requested a video of the "weird" sound and I sent the same one I posted. I attached their response below. They sent me a new muffler pretty quick and everything sounded normal after that. Thankfully swapping it out isn't a big deal but still an annoyance. Also was a little annoyed that they seemed to take the angle that it "was my fault". Right after install this is how the car sounded. Not after driving X miles, brand new from the factory.

I'm not bashing them in any way, that's just how I felt about it. Nowhere does it say you can't drive with it full throttle. I also commented on one of their posts about this and got a completely different answer so who knows.

I didn't have any issues with fitment like others mentioned. Ever after all this I decided to run their downpipe as well because I wanted a full system from 1 manufacturer. It sounds great but there was some issues installing the downpipe. (I'll list em if anyone is interested/curious). This is one of those, you get what you pay for scenarios I guess. I've put about 5000 miles on the new catback and it's still working perfectly.

If anyone is interested in a video to hear what the full turboback sounds like, I'll gladly take one for you guys!
Again I'm sorry it took so long to reply, hopefully this helps



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