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What is the best performing exhaust and intake?

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Old Oct 18, 2015 | 08:07 PM
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Default What is the best performing exhaust and intake?

Just bought a 2015 jeep grand cherokee, limited, 4 x 4.

What is the best performing exhaust and intake for the 3.6 liter motor?

Thank you.

Regards, Alberto
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Old Oct 18, 2015 | 10:54 PM
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I'd have to say a 67 mm turbo would be the best choice to cover both
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Old Oct 18, 2015 | 11:38 PM
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Originally Posted by s346k
I'd have to say a 67 mm turbo would be the best choice to cover both
Thank you, but I am not very clear on what you are recommending.

Regards, Alberto
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Old Oct 19, 2015 | 07:44 AM
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I think he's reccomending a turbo.
Are you asking about a full exhaust or just a muffler? Are you looking for performance or just looking to add parts? CAI ("cold air intake", not reccomended) or snorkel?
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Old Oct 19, 2015 | 08:42 AM
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Maybe return the 3.6 and look into the SRT possibly
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Old Oct 19, 2015 | 11:21 AM
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THe SRT, is brilliant, but out of my $ league.

If the turbo is strictly a bolt-on, trouble free kit, I am interested. If it were to require extensive mods, then not. If a full exhaust is practical, then I would be interested.
What I am looking for, bottom line, is a tried and true, trouble free system.

CAI, what is the negative?

Regards, Alberto
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Old Oct 19, 2015 | 11:26 AM
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The negative to a cold air intake is that they are a waste of money and do very little.
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Old Oct 19, 2015 | 11:28 AM
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Would a KN replacement filter be a better choice?
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Old Oct 19, 2015 | 11:36 AM
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Originally Posted by swift53
Would a KN replacement filter be a better choice?
No. Leaving the factory filter is the best option. Kn filters don't filter.
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Old Oct 19, 2015 | 12:21 PM
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Google showed me that the new 3.6 has some funky singular style exhaust manifold, can't even see where a header would go, or if one is made specifically for the GC.



That leaves the muffler. You can replace with an aftermarket unit, which may "perform" better than stock meaning less restrictive, but don't misinterpret that as meaning it will give any more performance.
As stated, CAI are 100% BS 99% of the time. Manufacturers actually put quite a bit of research when designing the entire intake system these days, it's not just a matter of putting plastic where it fits.
K&N will get different opinions. I ran them for years, now I typically just make sure I have a clean OEM filter in there.
A turbo may be bolt on, but may require retuning, larger injectors, etc. Trouble free? Well you will be increasing compression, in turn putting more stress on the internals, so take that into consideration. If you wanted more power you should have had a V8, but you didn't. I'd say just be content with the power output you have for now and keep power differences in mind for the next vehicle purchase.
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Old Oct 19, 2015 | 12:24 PM
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Originally Posted by s346k
I'd have to say a 67 mm turbo would be the best choice to cover both
I LOL'd
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Old Oct 19, 2015 | 12:42 PM
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Originally Posted by jay_sco
Google showed me that the new 3.6 has some funky singular style exhaust manifold, can't even see where a header would go, or if one is made specifically for the GC.



That leaves the muffler. You can replace with an aftermarket unit, which may "perform" better than stock meaning less restrictive, but don't misinterpret that as meaning it will give any more performance.
As stated, CAI are 100% BS 99% of the time. Manufacturers actually put quite a bit of research when designing the entire intake system these days, it's not just a matter of putting plastic where it fits.
K&N will get different opinions. I ran them for years, now I typically just make sure I have a clean OEM filter in there.
A turbo may be bolt on, but may require retuning, larger injectors, etc. Trouble free? Well you will be increasing compression, in turn putting more stress on the internals, so take that into consideration. If you wanted more power you should have had a V8, but you didn't. I'd say just be content with the power output you have for now and keep power differences in mind for the next vehicle purchase.

Thank you. Your reasoning is spot-on.
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Old Oct 19, 2015 | 12:55 PM
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Exhaust for a sound change.

Maybe a tuner can squeeze some performance out of it.

Leave the intake alone.

Look into a re-gear if you want a butt-dyno increase. This will be expensive and likely require the tuner to recalibrate systems. It will also affect mpg. Could gain, could lose some.

There really isn't a lot of bolt on power that is worth the investment beyond the ego boost "look what I have".

Jmho.
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Old Oct 19, 2015 | 01:11 PM
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Originally Posted by Tsaani97xj
Exhaust for a sound change.

Maybe a tuner can squeeze some performance out of it.

Leave the intake alone.

Look into a re-gear if you want a butt-dyno increase. This will be expensive and likely require the tuner to recalibrate systems. It will also affect mpg. Could gain, could lose some.

There really isn't a lot of bolt on power that is worth the investment beyond the ego boost "look what I have".

Jmho.
I know in the 3.6 wrangler a tune for 92 octane fuel can get quite a bit extra out of the engine.
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Old Oct 19, 2015 | 01:29 PM
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Originally Posted by toasterknight
I know in the 3.6 wrangler a tune for 92 octane fuel can get quite a bit extra out of the engine.
That is the best idea...
How do you tune for 92 octane? Just fill it up with it?

Thank you all for the great opinions.
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