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Old 06-29-2009, 10:35 PM   #1
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Default Magnaflow cat with Flowmaster 40s

I am getting the flowmasters 40s and deleting the resonator and replacing it with 2.5 pipe, do you guys think this cat will work good with these mufflers, or will it take away the sound of the flowmasters, I do like the magnaflow mufflers, just my opion, or would you go with a different cat, let me know your thoughts. Will this sounds pretty good, let me know.
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Old 06-29-2009, 10:42 PM   #2
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All I know from experience is that what your going to get is one loud Bonneville with a LOT of interior drone.

Other than that it will def turn heads.

What year make and model Bonneville do you have?
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Old 06-29-2009, 10:44 PM   #3
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What year is your car? Removing the resonator can cause the exhaust to become raspy. A free flow cat will deepen the tone a bit.
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Old 06-29-2009, 10:57 PM   #4
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just put a straight pipe in lol
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Old 06-30-2009, 01:11 AM   #5
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Depending on the year of your car, some after market cats can throw codes. I went with a Goerlich because it was recommended at the muffler shop as guaranteed not to throw a code on my 2000 SSEi.
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Old 06-30-2009, 01:12 AM   #6
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I had a 96 SSEi with a High Flow 'Magnaflow' Cat 3" that threw codes all the time.......
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Old 06-30-2009, 08:03 AM   #7
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3" Magnaflow here, and no codes ever.
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Old 06-30-2009, 04:34 PM   #8
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its a 03 ssei,
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Old 06-30-2009, 04:38 PM   #9
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For a 03 you will need the cat purplehazier mentioned.
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