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Old 09-13-2012, 02:17 AM   #1
frank1557
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Axle back need a tune?

Ordering the Flowmaster axle back setup and I'm gonna keep my resonator on my 12 l99. Will I need to tune my car?
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Old 09-13-2012, 03:27 AM   #2
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No need
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2011 2SS/RS L99
GMPP Exhaust

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Old 09-13-2012, 03:27 AM   #3
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From what i understand no unless you do long tube headers. I put on a Borla cat back exhaust and haven't thrown a cel and it runs fine. No tune needed.
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Old 09-13-2012, 05:25 AM   #4
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No need
While an axle back changes the sound of the exhaust it has no real impact on air flow.
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Old 09-13-2012, 09:48 AM   #5
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Originally Posted by frank1557 View Post
Ordering the Flowmaster axle back setup and I'm gonna keep my resonator on my 12 l99. Will I need to tune my car?
No, while tuning would add more power, you don't need to tune your car from adding axle-backs.

Let me know if I can help you with anything.
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Old 09-13-2012, 10:01 AM   #6
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Thanks!
I heard the reason why people are tuning theirs is to shut off that AFM.
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Old 09-13-2012, 10:07 AM   #7
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No you don't need a tune but since you have the L99 you will get drone with the Flowmasters.
Get an axle back exhaust like the Solo J-pipe or any J-pipe set up or you may be sorry.
Do a search here on camaro5 befor buying imo.
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Old 09-13-2012, 08:35 PM   #8
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Originally Posted by myold88 View Post
No you don't need a tune but since you have the L99 you will get drone with the Flowmasters.
Get an axle back exhaust like the Solo J-pipe or any J-pipe set up or you may be sorry.
Do a search here on camaro5 befor buying imo.

I agree. I have a Flowmaster AT catback on my 12 L99 - the drone is horrible, especially in 1500-1800 rpm range.
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