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Old 01-04-2013, 01:42 PM   #1 (permalink)
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"CTI over-the-axle piece" still available?

Have looked and looked (and looked!) and can't find any recent info on this. Am I looking in the wrong place? I haven't been under my new-to-me RL yet... is this piece simply a weld in 2.5" U bend or something that can be found elsewhere? Thanks!

Jay
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Old 01-04-2013, 05:11 PM   #2 (permalink)
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Looks like CTI went out of business. The stock exhaust shrinks from 2.5 to 2.25 where it goes over the rear axle so a lot of people have simply replaced that piece with a mandrel-bent 2.5-inch piece. You can try a place like this for the tubing: 04-07 SATURN ION EXHAUST TUBING KIT
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Old 01-04-2013, 05:28 PM   #3 (permalink)
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Chip to the rescue again! I'll have to crawl under there and look one of these days... like when I install that header Lol. Thanks buddy!
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Old 01-04-2013, 05:41 PM   #4 (permalink)
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No problem! Let me know how you like that header when you get it installed.
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Old 01-04-2013, 10:20 PM   #5 (permalink)
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Looks like my cti header back system is now a rare item lol.
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Old 01-04-2013, 10:33 PM   #6 (permalink)
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Most exhaust shops should be able to make a similar part. On my old car (1994 Acura Integra), I had an over-the-axle exhaust piece. Later on down the road, I had a local exhaust shop weld in some more pipes to make it a full cat-back.
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Old 01-05-2013, 08:43 PM   #7 (permalink)
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The stock resonator is very small though. Under a 2.25 opening just fyi
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Old 01-05-2013, 09:00 PM   #8 (permalink)
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Originally Posted by BULLIT View Post
The stock resonator is very small though. Under a 2.25 opening just fyi
Was my understanding that the crimped bend over the axle was the worst restriction in the stock exhaust?
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Old 01-06-2013, 10:55 AM   #9 (permalink)
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I've heard that the stock downpipe is also very restrictive, particularly where it tapers down around the 02 bung. However, with the ZZP LT you shouldn't have to worry about that.
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Old 01-07-2013, 08:47 AM   #10 (permalink)
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Quote:
Originally Posted by BULLIT View Post
The stock resonator is very small though. Under a 2.25 opening just fyi
Quote:
Originally Posted by ygetv8 View Post
Was my understanding that the crimped bend over the axle was the worst restriction in the stock exhaust?
No. The outlet of the stock DP and the inlet of the resonator are like 2 3/16" wide.

Ion Redline Exhuast Options Thread 2.0

I think Powell measured the openings with digital caliper and found them to be even slightly smaller...

And keep in mind that when building an exhaust it is better to free up restrictions closest to the engine and then work you way back. The reduced size over the axle is probably the last thing I would worry about when building a cat-back. If I was trying to improve the stock exhaust system on a budget this is how I would do it.

1. Port the stock exhaust manifold. I have done this a few times and it is pretty simple. Don't worry only about the outlet. A lot of material can be removed inside where the runners meet.

2. Buy two 2.5" flanges and replace the stock DP and resonator flange. That is a big restriction close to the engine. Or install a 2.5" V-band connection. I would go with the V-bands.

V Band Clamps

http://www.siliconeintakes.com/produ...e1d4952f0367cb

3. Replace the stock muffler with a 2.25" muffler of your choice. I know most people say to get a 2.5" and there is nothing wrong with that. For a highly modified LSJ a 2.5" is a minimum size you would want. But more most Stage 2 LSJs and even a little higher a 2.25" will work just fine and help keep the noise down.
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