BIG-SERT® OVERSIZED SPARK PLUG
THREAD REPAIR KIT M14x1.25
” OVERSIZED HOLES” For Spark plugs that have been previously repaired.
The stripped hole should not be larger than 16.8mm or .660 inches.
Spark plug thread repair kit P/n 5141S
5141S DOES NOT INCLUDE INSERTS
BIG-SERT SPARK PLUG KITS
KIT PART NO.
INSERTS
KITS
P/N
LENGTH
INCHES METRIC
WASHER SEAT P/N
TAPER SEAT P/N
M14x1.25
Short Version
p/n 5141S
does not include inserts.
——————————-
M14x1.25
Extended Version
p/n 5141E
does not include inserts.
Used in recessed holes 6″ inches/152mm or deeper.
.370 9.4mm
.430 11mm
.600 15mm
.660 16.8mm
.905 20mm
.965 24.5mm
51401
51403
51405
51407
51409
——-
51453
51455
51457
——-
51469
KITS THAT INCLUDE INSERTS
QTY.
LENGTH
INCHES METRIC
INSERT PART NO.
INVISIBLE TXT
Qty 1—>
Qty 2—>
Qty 1—>
INVISIBLE TXT
Qty 1 —>
Qty 2—>
Qty 1—>
Inches Metric
.370 9.4mm
.660 16.8mm
.905 23.mm
Total 8 inserts included
.430 11mm
.660 16.8mm
.965 24.5mm
WASHER SEAT P/N
51401
51407
51409
TAPER SEAT P/N
51453
51457
51459
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 spark plug kit
KIT PART NO.
LENGTH
INCHES METRIC
STYLE
TAPER SEAT P/N
Using Ford kit p/n 5553 to repair other vehicles / inserts. click here:
TRIPLE OVERSIZED SPARK PLUG REPAIR KIT M14x1.25
Repairs holes from 17mm to 18.5mm or (.670 inches) to (.730 inches)
( not recommended for virgin holes. ) use 5553 kit above
LAST CHANCE REPAIR FOR THE FORD 4.6 / 5.4 heads.
All the tools are included to repair the spark plug hole.
The kit will repair holes as large as .730 inches or 18.5mm by installing a special oversized insert
that will accept our 3/4 reach TAPER SEAT M14x1.25 BIG-SERT insert 51457.
M14x1.25
REDUCER
FORD HEADS
KIT PART NO.
LENGTH
INCHES METRIC
STYLE
5600
.550 16.8mm
REDUCER
We can now repair holes as large as .730 inches or 18.5mm by installing an insert inside an insert.