Before Changing Your Spark Plugs Read This TSB - Power Hungry Performance Forum

		Power Hungry Performance Forum > Ford F-150, Expedition, Navigator, Blackwood, Mark-LT, SVT Lightning and H-D Editions (Disabled) > 2004 to 2008 F-150 and Mark-LT
Before Changing Your Spark Plugs Read This TSB

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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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#10

Fri, December 11th, 2009, 01:59 PM

Ideal150

Whopper

Join Date: Oct 2009

Location: El Paso, TX

Posts: 16

ok sounds good. did u replace with stock ones or upgraded to something different? I know its a different topic but just curious if they make a big difference.

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2.5 HBS Level Kit, Magnaflow SI/DO, PHP Gryphon, AEM BruteForce

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