Question to those with Invidia Midpipe!

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Aug 21, 2011 | 12:50 AM

chi123

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Question to those with Invidia Midpipe!

Finally got my midpipe installed two days ago. Took a lot of work and time and I ended up having a shop blow torch a bolt and both O2 sensors off since they were rusted and tightened like crazy. When I started my car up for the first time, it scared the crap out of me how loud it was, especially since I was in my garage!

After inspecting, I found the bolts after the cats and at the axle were still a bit loose. Right after tightening them, it got much quieter. Almost like stock except it sounds nasty when revving. I looked under the car and noticed hot air around the cats, there's a slight 1-2mm gap between the cat flange and midpipe connection. I tightened the bolts completely though.

Is it normal to have a gap between the cat and midpipe flanges? I'm guessing it's cause of the gasket but not sure.

Aug 21, 2011 | 01:53 AM

ApokC

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You will have a small gap that the rubber gasket will seal it though.

Do you have an exhaust or stock exhaust with invidia mid?

Aug 21, 2011 | 02:15 AM

lilenday

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That should be good. I was curious about this too since I have the invidia and megan drift spec combo and couldnt find a reason why my setup sounds quieter than some other memebers'. I lifted my car up and saw that there was a small gap between the exhaust and the midpipe. It is sealed by the rubber gasket however. You should be alright

Aug 21, 2011 | 04:32 PM

chi123

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From: Chicago, IL

Quote:

Originally Posted by ApokC

You will have a small gap that the rubber gasket will seal it though.

Do you have an exhaust or stock exhaust with invidia mid?

I looked at the stock pipe and noticed how the flange for the connection to the cat is cut in a bit for the gasket while the Invidia isn't so I guess a gap is normal because of that. However, it feels and sounds like there is a leak somewhere but not sure where. I feel warm air around the cats but not enough to be sure if it's normal or if it's leaking there. Everything is tightened.

For now, I got a stock axle-back. I drove around a bit with the midpipe not connected to the mufflers and it's quite loud. So I decided I'm going to do straight-trough mufflers with dual tips each for quads sometime within the next two months or so.

Aug 24, 2011 | 06:16 PM

Sole350kid

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Quote:

Originally Posted by chi123

Did you car have any backfire when riding without your stock exhaust

Aug 25, 2011 | 02:53 PM

chi123

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Quote:

Originally Posted by Sole350kid

Did you car have any backfire when riding without your stock exhaust

You point out something interesting, when driving to school this week, I was stopping at a light and heard something. I thought something fell off my car, maybe my roof spoiler or something perhaps, but nothing did. I turned off my music and when I was coming to a stop at the next light, after going back into first gear, I heard a muffled popping sound. I tried to replicate it again and it did the same thing. This happened with the stock exhaust connected BTW. So yeah, it does a quiet backfire when changing back to first gear. It doesn't sound good though and I can't tell if smoke/fire comes out since I'm driving but I highly doubt that.