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BIG-SERT ® M14x1.25 SPARK PLUG
   

" OVERSIZED HOLES" For Sparkplugs that have been previously repaired.

The outside thread of the BIG-SERT is M18x1.5, the stripped hole should not be larger than 16.3mm or .640 inches.

SPARK PLUG KITS DO NOT INCLUDE INSERTS

 

 

 

p/n 5141 repair instructions
 
KIT SIZE
BIG-SERT
KIT PART NO.
LENGTH
WASHER SEAT P/N
TAPER SEAT P/N
INCHES
METRIC

M14x1.25
--------
M14x1.25
Extended
Version
5141
-------
5141E
NOTES
.370
9.4mm
51401
n/a
.430
11mm
51403
51453
.600
15mm
51405
51455
.660
16.8mm
51407
51457
.905
23mm
51409
-------
M14x1.25 Inserts are also available in aluminum click here: normally used in racing applications, where Nitromethane is used as a fuel. Steel inserts typically have a higher tensile strength than aluminum.
Ford
KIT PART NO.
LENGTH
Style
TAPER SEAT
P/n
INCHES
METRIC
Ford Style inserts
.660
16.8mm
Triton style
51459
.965
24.5mm
Z-tech style
51460
Using Ford kit p/n 5553 to repair other vehicles / inserts. click here:
" FORD TRIPLE OVERSIZED REDUCER TO M14x1.25" For 3/4 reach Sparkplug's
:ADD ON KIT: LAST CHANCE REPAIR FOR THE FORD 4.6 / 5.4 heads.
This is a special kit that is used in conjunction with the p/n 5553, 5141 or 5141E.
You must have 1 of these kits above to finish this repair.

The kit will repair holes as large as .720 inches by installing a special M18x1.5
insert that will accept our 3/4 reach M14x1.25 inserts p/n 51459, 51407 or 51457.
REDUCER
FORD HEADS ONLY
NOTES
KIT PART NO.
LENGTH
Style
Insert P/N
INCHES
METRIC
5588
.590
15mm
REDUCER
55522
We can now repair a hole as large as .720 inches by putting an insert inside an insert.

 

 

 

 

 

 
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