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1995 Buick Park Ave. Ultra magnaflow Cat

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Old Mar 14, 2007 | 12:15 PM
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Default 1995 Buick Park Ave. Ultra magnaflow Cat

Cany anyone tell me if these are fair prices for these cats? I belive that the 91006 is 2.5" in and out, can anyone confirm...Also, what is with the cat on the bottom? 23223 has a weird bend that I am not familiar with. Thanks,



http://www.autopartswarehouse.com/pe...5&brandid=3414
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Old Mar 14, 2007 | 12:18 PM
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What'* wrong with your cat? Is it plugged?

Have you measured your pipe? If the price is close to www.justmagnaflow.com you'll be ok.

Do you have a rear O2? 95 Buicks MIGHT. I know Riviera'* are OBD2 in 95.
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Old Mar 14, 2007 | 12:23 PM
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It is OBD-I.5, obd II plug but obd I. I have seen posts that the only hold up in the factory exhaust is the cat. I was thinking of putting a high flow cat on the car only. This summer I was going to inspect and repair any cracking in my exhaust manifolds. It should be very close to a 95 bonne exhaust without the y and with only one muffler. WIll a high flow cat do anything positive for me or should I leave it stock. I have a 2.7 pulley on the car...
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Old Mar 14, 2007 | 12:26 PM
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So this is a Performance topic, not a mechanical problem?

What'* a 2.7 pulley and where on earth did you get it?

And what Y do the same Bonnevilles have? That'* a 2k+ thing only. 87-99 have no Y.
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Old Mar 14, 2007 | 12:33 PM
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ZZP: http://www.zzperformance.com/grand_p...=321&catid=111

Sorry about the perfomrance post, can you move it for me...

Do 1994-95 Bonneville’* have 2 mufflers or just one like my Ultra? If they have 2 then the pipe y’* before them.
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Old Mar 14, 2007 | 12:57 PM
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As I stated above, 87-99 Bonnevilles don't have a Y. We run a Camaro/Firebird crossflow muffler with dual outlets. Mounted transversely.

Moving to Performance.
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Old Mar 14, 2007 | 01:14 PM
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Do you have a picture of your rear exhaust section so that I can compare it to my car? That would be great. I could put a nice set of tips on my Ultra to make it look nice.

Does a high flow cat help versus stock cats? I have seen you post that removing a cat will rob power down low...
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Old Mar 14, 2007 | 01:24 PM
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You may or may not notice it. Depends on how old and clogged your cat is. I may be 5-10hp.

Keep in mind you have a C body, not an H body. Muffler hangers may be different. I don't have a pic handy right now, but someone will chime in shortly.
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Old Mar 14, 2007 | 01:25 PM
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I think it would look something like this....

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Correct me if I'm wrong.
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Old Mar 14, 2007 | 01:30 PM
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That'* it. Note that the heatshields in the bumper cutouts are not installed in that pic.

That car is a 92-95. And it has a bad #3 intake valve lifter.
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