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1G Exhaust help

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Djsniperwolf

10+ Year Contributor
122
2
Jul 31, 2011
Hemet, California
I haven’t driven my eclipse in a while and it’s been bothering me, so I’d like to finally resolve this.

I got my car back after a few years of not having it. Unfortunately the exhaust has been messed with. With the sound laws out here being enforced I want to make it as legal as possible.

For the noise, I will most likely just go with a varex muffler.

The down pipe is 3” and is straight piped to a 2.5” catback. I’ve searched for a 2.5” down pipe to no avail.

What I want to do is put a high flow cat on to eliminate the strong exhaust smell that is obvious and avoid not having a cat.

Would a 2.5” hi-flow cat be adequate between the 3” and 2.5” openings? I would go 3” but it would be glaringly obvious that it is 3”.

The down pipe is flanged and connects to the straight pipe. I will have to put in another flange on the output side of the cat/test pipe as I don’t like it being welded.

I do plan on going e85 once I quiet things down. Maybe that will help with the emissions smell?

any assistance is greatly appreciated as it has been sitting, and I don’t want to drive it with as loud as it is which would ultimately lead to other “issues.”

thanks.
 
Last edited:
My car has the stock DP to a 2.5 in and out glass pack in the middle and a magnaflow muffler on the back with a 2.5 in and a 4 inch tip like a fast and furious ricer LOL. Its decently mellow no drone and would pass any decibel measurements. Squeezing a cat between the driveshaft and floor board will be tough even with just a 2.5 exhaust pipe my cherry bomb is just big enough no interference. Did these cars even have a cat as a 1g early 90s? You only should have to pass emissions for the year of manufacture right?
 
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