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Lt's and stock catback

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Old Aug 6, 2008 | 03:04 PM
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Default Lt's and stock catback

I have a 98 formula. The owner before me had it setup as a sleeper. So its got kooks lt's ory and the stock catback. Is the stock catback choking the car?
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Old Aug 6, 2008 | 03:06 PM
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I don't think it would be too bad. I always get a bullet style muffler on the end of the y-pipe dumped.
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Old Aug 6, 2008 | 03:31 PM
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How bad would my setup be with a borla xr-1 dumped?
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Old Aug 6, 2008 | 03:33 PM
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Originally Posted by SlwBirdy
How bad would my setup be with a borla xr-1 dumped?
Not as loud as my Dynomax Bullet..hah

check out www.ls1sounds.com
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Old Aug 6, 2008 | 03:44 PM
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With long tube headers, what Y pipe would let me mate to the stock cat back? I have a cutout on right now, is always open, so the flow wont be too bad.
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Old Aug 6, 2008 | 04:06 PM
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Originally Posted by AznMuscle
With long tube headers, what Y pipe would let me mate to the stock cat back? I have a cutout on right now, is always open, so the flow wont be too bad.
I'm pretty sure most Y-pipes come with a narrowed end so they slip into the stock or aftermarket catback.
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Old Aug 6, 2008 | 04:10 PM
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Ok thanks. I think Thats the route I'll go with...for now. H pipe later down the road. Sorry for the thread hijack. Put a cutout on the stock I pipe, and I think you will free up enough power.
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Old Aug 6, 2008 | 06:25 PM
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I also have LT's ORY and a stock catback but I do have a cutout. And i'll be the first one to say I think the car is just as fast with the cutout capped as it is open.
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Old Aug 7, 2008 | 12:46 AM
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Ok the guy had the i pipe narrowed to 2 3/4 pipe. i cut it at that point. and now have 3 in pipe to the xr-1 and have it dumped in front of the axle. not quite as loud as id like but great sound. I needed something anyway since vernon is coming up and im going to do bottle and stall before I finish back bumper and skirt conversion.
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Old Aug 7, 2008 | 12:51 AM
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Got any sound clips?


After I get the new stall I'm definitely changing my exhaust...the Pacesetter Y pipe is pathetic. I'll be getting the flowmaster merge collector.
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Old Aug 8, 2008 | 01:00 AM
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No sound clip yet. Got a nasty belt sqeak lol. I like it tho. Didnt want way loud because im going to stall soon. Would be a little much i think for a dd. Im real happy with it tho. Will probable switch to a true dual down the road but this is just fine for now. Vernon cruise is tomorrow i might get a clip then.
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Old Aug 8, 2008 | 01:16 AM
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i had lt's ory and stock catback with a cutout.....just slap a cutout in there
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Old Aug 8, 2008 | 01:30 AM
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Cutout on the stock exhaust would be a pretty sweet setup.
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Old Aug 8, 2008 | 06:31 AM
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Originally Posted by krazy4
Cutout on the stock exhaust would be a pretty sweet setup.
I rocked that for a long time.
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Old Aug 8, 2008 | 07:01 AM
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my buddy has a lid long tube 01 b4c. he had an orx and true duals with 4x9 magnaflows dumped at the axle - trapped 109. removed the orx and added the stock catback + ory, the car trapped 107 in much worse conditions. i don't think the stock catback is hurting power much at all with stockish power levels.
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Old Aug 8, 2008 | 10:40 AM
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I didnt get a before an after dyno or time. And with sound hard to really say it's really any faster.
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Old Aug 8, 2008 | 12:21 PM
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http://media.putfile.com/Cutout-closed

Here is my car with stock cat back and the cutout closed. It now sounds even better than that because it has a few leaks in that clip. Plus I have C6 tips on there now. I cant get a good cutout open clip because the camera just distorts the sound because its so loud haha
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