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EXHAUST help please

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Old 01-29-2009, 06:54 AM
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EXHAUST help please

Hi, my CEL light came on few weeks back, just got a call from mazda and they say it is because the cat has gone. Would you reccomend changing just the cat (cheapest option) or the cat back?, as there will be bits blowing around in the rest of the exhaust from the old cat, and i am not sure if that will damage anything in anyways?

Cheers
Old 01-29-2009, 08:55 AM
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if your car is still under warranty, take it to the dealer and have them change the converter.
Old 01-29-2009, 09:04 AM
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unfortunatly the warranty has ran out it is 2004 model.
Old 01-29-2009, 10:21 AM
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No NO NO

Warrenty for emmissions are good for 80,ooo miles
Old 01-29-2009, 12:26 PM
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^yes....80k miles or 8 yrs I believe no maybe it's 6yrs can't remember but either way if ur not to 80k it's covered!
Old 01-29-2009, 12:36 PM
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Im in the uk, does the warranty still apply??not sure if its same as it is in US, car only has 40k on...
cheers guys
Old 01-29-2009, 12:40 PM
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US mandates 80,000 on emissions items, in the UK it might be different.

Replacing with a catback will not help because it would not replace the catalytic. OEM cats are expensive, maybe get the RP Supercat? (although, not sure what it would cost to ship to you)
Old 01-29-2009, 12:41 PM
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http://www.rx7.com/store/rx8/rx8exhaust.html
Old 01-29-2009, 12:43 PM
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No sorry, i was going to replace either just Cat, or the cat + cat back not sure weather its worth getting the lot done??
Old 01-29-2009, 12:43 PM
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Rp Super cat is good and has alot of users for feedback.
Old 01-29-2009, 12:45 PM
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how much is a cat in UK? Can you find any used ones from people that have put midpipe or turbos on?
If you cannot, try getting that RP Supercat, I've had it for a year and it works very well.
If you feel like changing the exhaust note of your car, I recommend a catback. Not much hp difference but the look / sound is worth it to me.
Old 01-29-2009, 12:53 PM
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the RP cat is good enough.

Save your money. you don't need a new muffler.
Old 01-29-2009, 01:05 PM
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Cheapest cat i have found is £280 on ebay, and cat back is £260. just a little worried that if i replace just the cat all the loose bits from my old cat will blast and damage the exhaust??
Old 01-29-2009, 01:15 PM
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if the cat is broken up into pieces, they'll fall out when you take the cat out. No need to replace the catback just for that.

The RP Supercat is $395 US Dollars, how much is that after conversion?
Old 01-29-2009, 01:18 PM
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it is £277 so cheaper than other one...
Old 01-29-2009, 01:20 PM
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send them an email to see what it would cost to ship.
Old 01-29-2009, 01:36 PM
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Sometimes you can find a used RP super cat in the for sale section.
Old 01-29-2009, 01:42 PM
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yes, but sometimes they're the earlier models that dont have the right mounting points. (plus, the later models had a heat shield put on)
Old 01-30-2009, 07:18 PM
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I also say supercat!
Old 01-30-2009, 07:20 PM
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Originally Posted by 04RX8man
I also say supercat!

Old 01-30-2009, 07:35 PM
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LMAO
Old 02-01-2009, 03:01 PM
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would i have to replace the mid pipe as well??
cheers
Old 02-01-2009, 03:07 PM
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You would normally replace a cat with a midpipe. Did you install a midpipe on your car? If you did it will throw a CEL for a failed cat and Mazda will want to replace it.
Old 02-01-2009, 03:13 PM
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The cat IS the mid-pipe. The header connects to the (shin-bone!) cat which has a resonator behind, then joins to the 'cat-back'. An aftermarket midpipe replaces the cat and resonator.

A 'dead' cat is usually stucturally sound, just dead catalytically and no longer working. They don't usually break into chunks.

Does the MoT do emissions testing? Do you 'need' the cat? An empty cat-shell will give a tiny boost to performance, mileage and sound great.....

S
Old 02-01-2009, 03:24 PM
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mazda told me i need to replace the cat,it is completely stock at the moment. so i was looking at the RP ‘Supercat’ Mid Pipe, would i need to order anything else?? will it pass the MOT for emisions also?


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