If your vehicle is listed on the fitment table below, the product will fit your car - we guarantee it. All you need to do is to ensure that the vehicle's Year, Make, Model, Trim, and any other notes specified inside the fitment table are respected.
Included warranty:
For warranty coverage information, please see our
Warranty Policy.
ThunderSpark Coil Boots and Coil Boot Kits are OE Replacement components designed to restore critical spark isolation and electrical connection in modern ignition systems. In coil-on-plug (COP) or coil-near-plug (CNP) configurations, coil boots serve as the insulative path between the ignition coil and the spark plug. Over time, these boots can degrade due to heat, vibration, or chemical exposure—leading to arc-through, misfires, or hard starting. Walker coil boots are engineered to match OE specifications for dielectric strength, length, and terminal fitment, ensuring proper high-voltage insulation and secure coil-to-plug contact. Each boot is constructed from premium silicone and other high-temperature materials to withstand engine bay conditions. Coil Boot Kits include all necessary components—boots, springs, and insulators—for full-cylinder service, making them ideal for ignition tune-ups or preventative maintenance. Whether replacing a single boot or servicing an entire engine set, Walker Coil Boots and Kits help restore ignition reliability, engine smoothness, and emissions performance.
Characteristics include:
OE Replacement Quality: Engineered to match OE dielectric strength, boot length, and connector geometry for consistent performance.
Restores Ignition Insulation: Replaces worn or cracked boots to ensure proper spark isolation and prevent voltage loss.
Complete Kit Coverage: Coil Boot Kits include boots, springs, and insulators needed for full cylinder replacement—ideal for tune-ups and repairs.
Heat & Chemical Resistant: Constructed from high-temp silicone and reinforced materials to resist oil, fuel, and under-hood heat.
Exact OE Fit: Designed for 100% compatibility with factory ignition coils and spark plugs for coil-on-plug and coil-near-plug systems.
Some of the interchangeable part numbers are:
CPBK230 | 128042
Customer Video Reviews
Watch genuine customer videos showing their upgrades and honest results of similar products
Fitment Table
This product is compatible with these vehicles:
Year
Make
Model
Notes
Position
2015
Ford
Mustang
5.0L
V engine
8 cylinders
3.63" bore
3.65" stroke
2014
Ford
Mustang
5.0L
V engine
8 cylinders
3.63" bore
3.65" stroke
2014
Ford
Mustang
5.8L
V engine
8 cylinders
3.68" bore
4.17" stroke
2013
Ford
Mustang
5.0L
V engine
8 cylinders
3.63" bore
3.65" stroke
2013
Ford
Mustang
5.8L
V engine
8 cylinders
3.68" bore
4.17" stroke
2012
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2011
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2010
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2009
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2008
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2007
Ford
Mustang
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2007
Ford
Mustang
Shelby GT
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2006
Ford
GT
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2005
Ford
GT
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2005
Lincoln
Aviator
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2004
Ford
Mustang
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
Engine VIN code R
2004
Ford
Mustang
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
Engine VIN code Y
2004
Lincoln
Aviator
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2004
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2004
Mercury
Marauder
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2003
Ford
Mustang
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
Engine VIN code R
2003
Lincoln
Aviator
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2003
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2003
Mercury
Marauder
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2002
Lincoln
Blackwood
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2002
Lincoln
Continental
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2002
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2001
Ford
Mustang
SVT Cobra
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2001
Lincoln
Continental
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2001
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
2000
Lincoln
Continental
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
2000
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
1999
Ford
Mustang
SVT Cobra
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
1999
Lincoln
Continental
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
1999
Lincoln
Navigator
5.4L
V engine
8 cylinders
3.55" bore
4.17" stroke
Cylinder head: DOHC
1998
Lincoln
Mark VIII
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
1997
Lincoln
Mark VIII
4.6L
V engine
8 cylinders
3.55" bore
3.54" stroke
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