when should i see a difference.? new magnaflow 2.5'' catco - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-08-2007, 12:54 PM   #1
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Default when should i see a difference.? new magnaflow 2.5'' catco

i have recieved my new magnaflow catco today after measuring my exhaust and so i will be going on thursday or friday to get it welded on at meinike ( think i spelled it wrong)
and i want to know when should i expect to see a difference in my mpg and also my performance as well... and is it going to sound different with a magnaflow catco instead of the old stock one..? im just very curious... also should i put a new muffler as well. would it be worth it besides just sounding better
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Old 10-08-2007, 05:12 PM   #2
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At this point a Muffy won't make a big difference if at all.. You shouldn't be outflowing it at this point..

The Cat may help and will give you a different tone... But how much it will help also depends on how plugged your stock unit may be..

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