2.2L L61 Performance Tech 16 valve 145 hp EcoTec with 155 lb-ft of torque

Cat-less or High flow?????

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Old 05-28-2009, 12:02 PM
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i am catless and it doesn't sound bad at all now that i have a muffler on
Old 05-28-2009, 12:05 PM
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Originally Posted by G85 SS
Mmk, I have the stock manifold, 3" CTI catless DP into a Magnaflow catback exhaust. At idle or at RPM's under 3 grand it sounds effing amazing. But, if I whomp on it it is obnoxiously loud.

I also lost about 2 pounds of boost. Guess my stock downpipe had a clogged cat. Car runs a lot better now too. It feels like it pulls a little bit harder up top.
nice man lol my s/c loud already i got megan def getting catless cant wait :P
Old 05-28-2009, 12:08 PM
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^
i can't hear the supercharger at ALL, only at idle i can hear it whistle

i have vibrant 4-2-1 header, 2.5 inch catless downpipe and 3 inch cat back.
Old 05-28-2009, 12:23 PM
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i have a pacesetter header with 2.25 catless-2.25 cherry bomb resonator...carbon fibor Muffler and it sounds great..its def louder without the cat and u def need a resonator cuz then yes it will sound like ass...i found out the expensive way haha...if you get the pacesetter you need a downpipe made so i just told the guy to hack out the cat and straight pipe it...110 for install of the header and downpipe then another 150 for the rest of the pipiing and welding...very pleased
Old 05-28-2009, 12:23 PM
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Originally Posted by stoon_cobalt_colby
nice man lol my s/c loud already i got megan def getting catless cant wait :P
My buddy had catless on the megan and it was stupid loud. That's a quick way to get tickets. lol
Old 05-28-2009, 01:49 PM
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lol cops around here dont car unless u go just ripping past them and its loud as **** lol but oh well i will find out i guesss ahhaa

Originally Posted by Preston
^
i can't hear the supercharger at ALL, only at idle i can hear it whistle

i have vibrant 4-2-1 header, 2.5 inch catless downpipe and 3 inch cat back.
im going with the zzp setup i think so cheapest route

Last edited by stoon_cobalt_colby; 05-28-2009 at 01:49 PM. Reason: Automerged Doublepost
Old 05-29-2009, 01:21 PM
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these guys got the right idea...I got a magnaflow hi-flo cat...looks and sounds good....most balts I've heard that are catless sound pretty raspy
Old 05-29-2009, 01:31 PM
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Originally Posted by stoon_cobalt_colby
im going with the zzp setup i think so cheapest route
order your downpipe through OTT. I got my CTI through them and the craftsmanship on them is great. ZZP Downpipe tend to break quite often. Haven't seen a CTI fail yet.
Old 05-29-2009, 05:10 PM
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well i think what im gonna do for now is but the zzp header and leave the satock down pipe and order the 2.2 HO intake mani. and hopefully that will help her breath better
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