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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. |
| View Poll Results: What engine do you have? | |||
| 4.2 |
   
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0 | 0% |
| 4.6 |
  
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56 | 26.17% |
| 5.4 |
  
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157 | 73.36% |
| Other |
  
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1 | 0.47% |
| Voters: 214. You may not vote on this poll | |||
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#14
Sat, December 5th, 2009, 02:53 AM
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If at all possible, use the manufacturers website to determine the "Rev per Mile" rating of the tire. Then to convert to millimeters, use this formula...
1609344 / Rev per Mile = Tire Circumference in mm That helps eliminate any guesswork. 
__________________
Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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