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Modular Spark Plug List


Discussing Modular Spark Plug List in the 99-04 Forum. Here is a list of part numbers and heat ranges for plugs on our cars ...

       

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Old June 22nd, 2008, 05:03 PM   #1
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Modular Spark Plug List

Here is a list of part numbers and heat ranges for plugs on our cars

MOTORCRAFT

PART# / HEAT RANGE
AWSF-32C / stock heat range - copper plug
AWSF-22C / 1 Heat range colder - copper plug
AWSFA-12C / 2 Hea range cooler - copper plug
AGSF-32C/ Recommended for FRPP heads(not sure on heat range)

NGK

PART# / HEAT RANGE
TR-55/ 3951/ Stock Heat Range
TR-6/ 4177/ 1 Step Colder
BP7EFS (PN - 3526) BR7EF (PN - 3346) two steps
R5724-8 (PN - 7317) two and a half steps
R5724-9 (PN - 7891) three steps
R5724-10 (PN - 7993) four steps

AUTOLITE

PART# / HEAT RANGE
764s / Stock
103s / 1 heat range cooler
AR94 / 2 heat range cooler
AR93 / 3 heat range cooler
AR92 / 4 heat range cooler

CHAMPION

PART# / HEAT RANGE
YS-59C / -3 or -4 below stock heat range

DENSO

PART# / HEAT RANGE
IT16 / stock heat
IT20 / -1 heat range
IT22 / -2 heat range
IT24 / -3 heat range
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99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k
06 Dodge MegaCab. Cummins diesel power. Smarty jr. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip
 
Old June 22nd, 2008, 05:07 PM   #2
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Nice!!!!!
 
Old June 22nd, 2008, 05:17 PM   #3
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ppl will still ask lol
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Old June 22nd, 2008, 05:32 PM   #4
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this is a good thread, +rep for ya white.
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Old June 22nd, 2008, 11:42 PM   #5
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champion:
304's 1 stage colder
344's 2 stages colder
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Old June 22nd, 2008, 11:51 PM   #6
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Cool now I don't have to wonder lol.
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Old June 23rd, 2008, 12:46 AM   #7
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good stuff man!
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Old June 23rd, 2008, 12:53 AM   #8
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good info man! much appreciated!
 
Old June 23rd, 2008, 08:45 AM   #9
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Are they in order from best to last or are all the brands good
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now that i can drive, hope to break my crappy 14.4
 
Old June 23rd, 2008, 08:46 AM   #10
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they are just put up there man, no specific order.
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99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k
06 Dodge MegaCab. Cummins diesel power. Smarty jr. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip
 
Old June 24th, 2008, 10:41 AM   #11
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this is great info!!!

would it be possible to add the reasons behind the heat range differences? Thanks!
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Old June 25th, 2008, 11:16 PM   #12
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thanks a lot white!
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Old June 25th, 2008, 11:55 PM   #13
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all and all unless spraying or boosted no need to get anything in the colder heat range.
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99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k
06 Dodge MegaCab. Cummins diesel power. Smarty jr. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip
 
Old June 28th, 2008, 09:13 AM   #14
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what do you have to gap the spark plugs to?

and how the hell do you remove them without taking the fuel rail off?
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Last edited by energiesource : June 28th, 2008 at 09:18 AM.
 
Old June 28th, 2008, 10:18 PM   #15
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I'll be the first to say that I don't know shit about spark plugs and this list is much appreciated.

Tim, do I need to worry about going colder with my setup? I figure I need to change my plugs soon.
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For sale: piano, boost gauge, F150 muffler, vending machines, windshield wiper assembly, record/8 track player, z28 tail/corner lights, head unit for Nissan Frontier
 
Old June 29th, 2008, 12:48 PM   #16
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brenden read post #13
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99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k
06 Dodge MegaCab. Cummins diesel power. Smarty jr. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip
 
Old June 29th, 2008, 02:55 PM   #17
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Originally Posted by White99stang View Post
brenden read post #13
I saw that, was just wondering if one needs to go colder with a built engine.
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'99 Mustang GT [318 rwhp N/A]
2004 F-150 XLT SuperCab (FOR SALE)



For sale: piano, boost gauge, F150 muffler, vending machines, windshield wiper assembly, record/8 track player, z28 tail/corner lights, head unit for Nissan Frontier
 
Old June 29th, 2008, 02:55 PM   #18
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nope.
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Old June 29th, 2008, 08:29 PM   #19
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again brenden read post #13 lol.
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99 Mustang GT VT 302 Stroker (race car) 11.13@123 for sale 9k
06 Dodge MegaCab. Cummins diesel power. Smarty jr. Diablosport Powerpuck, Silencer ring removed, intake baffling mia, Isspro pyro, boost, and tranny gauges, 6inch chrome tip
 
Old July 11th, 2008, 10:23 AM   #20
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How do your determine what heat range you want with boost?
 
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