Karlyn STI® 673 - Spark Plug Wire Set

00 reviews / Item # mpn1813216
Karlyn STI® - Spark Plug Wire Set
Karlyn STI® - Spark Plug Wire SetInstallation Instruction! Karlyn STI® - Spark Plug Wire SetKarlyn STI Authorized Dealer
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Fits Following Model(s):
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  • Requires 1 per Vehicle
  • Requires Coil Pack P/N 5098
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Product Details

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Karlyn STI

Spark Plug Wire Set (673) by Karlyn STI®. The purpose of good wire insulation is to protect the cable from voltage leaks. The single most important factor for rating insulation performance is the type of material used and not the diameter of the wire.


  • Requires 1 per Vehicle
  • Requires Coil Pack P/N 5098

Karlyn STI


  • Spiral Core
  • Stainless Steel Magnetic Conductive Winding
  • Improves Gas Mileage and Engine Performance
  • Superior Voltage Protection
  • Includes Specially Designed Durable Boots
  • Corrosion-Resistant / Oversized Clip-Lock Terminals
  • Limited Lifetime Warranty

Karlyn STI is recognized worldwide as one of the most proven and reliable manufacturers of ignition and suspension parts in the automotive aftermarket. The brand's history traces back to 1971 when German engineer Hans Bierdumpfel founded Karlyn STI, after working on leading positions in several respected companies in the USA. At first the company produced VW ball joints and tie rod ends, and further expanded into manufacturing suspension parts and high-performance spark plug ignition cable sets for a range of vehicle applications. Today, Karlyn STI product lines are admired by automotive fans for their unmatched performance and superior durability.

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Warranty Information

Find out everything you need to know about the product warranty

Karlyn Industries/STI distributes high qu ality COP components. We utilize independent engineers to monitor our coils and test warranties. Most coils that are returned DO NOT have a proble m. Rough running engines that set misfire codes can have multiple causes. It is t he responsibility of the dealer/installer of our products to verify that the following items of inspec tion have been performed, in order to compl y with warranty replacement. General misfire codes are most likely due to an intake vacuum l eak or fuel delivery problem. Misfire codes identifying a parti cular cylinder are usually due to a fouled spark plug; dirty or dead fuel injector or loss of compression in the cylinder (burned or bent valve, w eak or broken valve spring or leaky head gasket.)If the crankshaft position sensor fails, the loss of the basic timing signal will prevent the syst em from generating a spark and the engine will not start or run. A failed driver circuit within the power train control module (PCM) can kill an ind ividual coil and prevent that cylinder from firing. Replacing the coil without addr essing the cause will only result in another damaged coil. Misfire codes can also be triggered from a damaged wire harness due to poor grounds. Inspect the wire harness carefully. You may have to cut back the insulation to verify that there is no corrosion or melt ing of the wire harness due to poor grounds. A faulty harness can cause the coil to fail. If you simply install a new COP it may seem like you have corrected the problem but, merely replacing the coil without r epairing the grounding problem may result in future coil failures. In summary, it is important to re member that ignition misfire can also be caused by other factors such as worn or fouled spark plugs, loose or damaged coil connectors or terminals, dirty fuel injectors, low fu el pressure, intake vacuum lea ks, loss of compression in a cy linder, even a tank full of "bad" gas contaminated with water. These other possibiliti es should all be ruled out before a COP unit is replaced. (N ote: A fouled spark plug can damage the COP. We recommend that you always replace the spark plugs when you replace the COP units and that all the ig nition coils be replaced at the same time. As a form of preventiv e maintenance we suggest this be done every 60,000 miles) We will do our job to monitor and test the integrity of our coils. We hope that this information will help you to enhance the re liability and credibility of your repair while complementing our product. The main goal here is a real solution to your ignition problem which will result in happy customers. Temporary solutions will only result in the return of non-def ective parts and unhappy customers who will continue to have the s ame problem.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is compatible with 28 vehicle(s)
Year Make Model Fitment Notes:
2006 Subaru Baja
2005 Subaru Baja
2004 Subaru Baja
2004 Subaru Forester
2004 Subaru Impreza
2004 Subaru Legacy
  • Manufactured Before February
2004 Subaru Outback
  • Base / Limited Manufactured Before February
2004 Subaru WRX STI
  • 2.5L
2003 Subaru Baja
2003 Subaru Forester
2003 Subaru Impreza
2003 Subaru Legacy
2003 Subaru Outback
  • Base / Limited
2002 Subaru Forester
2002 Subaru Impreza
  • Manufactured Before April
2002 Subaru Legacy
2002 Subaru Outback
  • Base / Limited
2001 Subaru Forester
2001 Subaru Impreza
2001 Subaru Legacy
2001 Subaru Outback
  • Base / Limited
2000 Subaru Forester
2000 Subaru Impreza
2000 Subaru Legacy
2000 Subaru Outback
1999 Subaru Forester
1999 Subaru Impreza
1999 Subaru Legacy
  • 2.2L
Karlyn STI® - Spark Plug Wire SetKarlyn STI® 673 - Spark Plug Wire Set    $29.80
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