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Old 11-12-2011, 12:36 PM   #1
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Post stock exhaust with magnaflow mufflers

Will you get more ponies and better sound having the Bonneville Gxp stock exhaust and add Magnaflow mufflers.
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Old 11-12-2011, 12:58 PM   #2
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You'll get different sound, but I don't think changing only the mufflers will increase HP any.

GM engineered that exhaust flow pretty good.
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Old 11-12-2011, 08:01 PM   #3
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The only way you'll see any noticeable HP increase is if you do a full exhaust. Even then, it won't be any major increases.

The mufflers should give it a nice sound though.
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Old 12-18-2011, 02:38 AM   #4
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fyi changing out any of the stock exhaust with aftermarket parts, converter, pipe, mufflers etc will lead to an always on check engine light......the exhaust on these puppies is very timid.....and the computer hates you if you change to aftermarket parts
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Old 12-18-2011, 09:55 AM   #5
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Quote:
Originally Posted by rallton View Post
fyi changing out any of the stock exhaust with aftermarket parts, converter, pipe, mufflers etc will lead to an always on check engine light......the exhaust on these puppies is very timid.....and the computer hates you if you change to aftermarket parts
That'* incorrect. We have plenty of members who have changed out exhaust parts with no problems.
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