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Old 19-12-2010, 04:20 PM   #1
canuk7
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Default 100cpsi cat

Hi all,
Did a search on catalytic converters but could'nt find exactly what I want. I have 2.5 redback exhaust system with a resonator fitted now but still run the stock cat. I'd like replace the cat with a 100cpsi one but am worried about any extra noise. Can anyone running a 100 tell me if they make the exhaust system much louder. I dont want the boys in blue looking at me.!!!!

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Old 19-12-2010, 04:27 PM   #2
madmelon
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I bought two off this site a year ago for a mates SS Ute. Made it a bit louder, definitely more crackly on the overrun and slightly more of an old school sound I suppose.
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Old 19-12-2010, 04:55 PM   #3
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Thanks madmelon.!!!!
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Old 19-12-2010, 05:01 PM   #4
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Won't necessarily make the note louder, but it will make it a tiny bit deeper.
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Old 19-12-2010, 05:05 PM   #5
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mine seemed a bit louder when i put it onto my system. defs deeper tho as mentioned above.
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Old 19-12-2010, 08:31 PM   #6
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Mine was always loud, so didnt notice anything get louder.
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Old 20-12-2010, 01:26 PM   #7
347 mont
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Hi Canuk7, I had two 100 CPI 3"cats fitted last Thursday. The week before I had some Pacies 4 into 1's fitted into the old 2 1/2 inch Redback exhaust system into the stock cats. There was an improvement in power and torque and sounded a bit different. Anyways when I went to have the cats fitted we found the old system to resembled something like swiss cheese so a new 2 1/2 Mantra system was fitted along with the 3"cats which are 100 CPI Metal Matrix. Well I got a call to pick the Fairmont up and the exhaust guy said your car is ready mate and it sounds friggin awesome. I am very happy with the note which sounds like an old school v8 especially at idle, start up and when cruising at 2000RPM and below, over 2500RPM its "barky" then sounds different again over 3500 RPM. I am also happy in the power and torque gain however wouldnt say it was good bang for buck but at least I'm set up for future mods now, hope this helps. Oh and yeah its pretty loud now thats for sure
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Old 20-12-2010, 09:18 PM   #8
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i had a kenobi fitted few months now mate sounds deaper and tiny bit louder but no enough to attract attention.

works wonders with fuel consumption to (driven in correct manner.)
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Old 21-12-2010, 12:26 PM   #9
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Thanks for all the replies guys, think I'll get the 100
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Old 23-12-2010, 12:06 AM   #10
347 mont
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I dont know about I6 but I can speak for the V8, sound awesome, all positive comments from mate and work mates
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