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2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs

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Old Wed, April 11th, 2012, 01:48 PM
idencker idencker is offline
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Question Custom tune needed for minor exhaust upgrade?

I have the Edge Evo now and plan on buying a couple custom tunes in the very short term future. My question is, I have also thought about upgrading the exhaust a bit and wondered if I should wait to do the custom tune until after the exhaust work. The most I would do is a SI/SO exhaust from MBRP or Magnaflow but I have also thought about just swapping the stock muffler for something that has a bit of rumble. Any and all input is greatly appreciated.

I tow 5000 lbs. almost every weekend in the spring/summer/fall. I also know that with my CAI that I am probably running pretty lean right now so I want to remedy that asap too.

2004 F-150 SCREW 5.4 4x4 Lariat 72K Black
Edge Evo
275/70/18 Michelin LTX A/T2
K&N CAI 57-2556 - (plan to sell and go back to Gotts mod)
E-Fan from Mark 8, FAL controller 31165-VSC
2" front leveling lift
2x10" Fosgate subs under back seat
2x amps behind rear seat
6x8's in all doors

Last edited by idencker; Wed, April 11th, 2012 at 02:33 PM.
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Old Wed, April 11th, 2012, 08:53 PM
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Longshot270 Longshot270 is offline
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If you are not changing anything from the "y" forward you don't need an adjustment so go ahead and order.
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Old Wed, April 11th, 2012, 08:58 PM
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As far as I know, any exhaust modification besides a true dual exhaust won't need any modifications to your tunes.
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Old Thu, April 12th, 2012, 10:28 AM
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Quote:
Originally Posted by ticopowell View Post
As far as I know, any exhaust modification besides a true dual exhaust won't need any modifications to your tunes.
Most hi-flow cats need it as well as long tube headers and some short tube headers. Has to do with the flow rate dynamics.
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Old Thu, April 12th, 2012, 11:41 AM
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I forgot to say mods after the cats...., lol oops.
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Old Thu, April 12th, 2012, 12:13 PM
idencker idencker is offline
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Thanks so much for the advice. I got my tunes ordered!
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