IS F (2008-2014) Discussion topics related to the IS F model

To keep the stock ISF mufflers or aftermarket

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Old 03-16-15, 11:10 PM
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idoke1
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Default To keep the stock ISF mufflers or aftermarket

I have a custom 2.5 x pipe straight pipe from stock headers to stock mufflers. No secondary cats and no resonator. My question is, should i change the stock mufflers? I like the sound of my custom exhaust set up to stock mufflers as it is quiet but i hate the fact that my inlet to the stock mufflers are smaller then my pipes. I feel there is restriction by the stock mufflers and I'm not getting much hp gain for it. I've seen the pics inside the stock muffler and it really looks restrictive. What can i do to get full exhuast utilization and no drone noise?
Old 03-16-15, 11:59 PM
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F_Throttle
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Let me know if you sell your setup or have a sound clip. I've been thinking about this.
Old 03-17-15, 12:33 AM
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ISF4life
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Joez exhaust and intake will save all your troubles, sounds and performance
Old 03-17-15, 02:42 AM
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Going to be hard to get no drone, best route I can think of is the Borla axleback.. I would avoid custom exhausts, personal opinion, unless you get the work done for dirt cheap
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Old 03-17-15, 03:07 AM
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RichFlair
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i used crosa mufflers
Old 03-17-15, 04:07 AM
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Justind27
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I'll have some joez mufflers available the end of the week, I got a pair of jic magic titanium bullet mufflers in the correct sizes I needed.
Old 03-17-15, 01:20 PM
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idoke1
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Thanks guys. I think i may go borla mufflers and keep my stock mufflers just in case it gets too loud.
Old 03-17-15, 04:03 PM
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PPE Dual mode if you have the funds.

I love mine, nice having a "wife/cruise" mode and an aggressive mode all with the press of a button.
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