Engine Kits

8.5mm HEI/Point Style 90- at Plug Universal Sets
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MSD Ignition

8.5mm HEI/Point Style 90- at Plug Universal Sets

Part #: 31239
List Price: $199.82
Our Price: $99.91
You Save: $99.91

Availability: In Stock

Set includes terminals for engines with early type (socket) and late type (HEI “spark plug top”) distributor caps. 90° boots and terminals factory installed on one end.

Universal Kits
MSD Universal Kits have the spark plug terminal and boot installed with the other end of the wire open. This way, you can route the wires the way you like and cut them for a custom fit! A special Mini-Stripper-Crimper Tool is supplied to strip and crimp the wire together.

The MSD 8.5mm Super Conductor Wire is "The" Performance Wire. Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference! In a single 12 inch length of Super Conductor Wire there is only 40 - 50 ohms of resistance! That is the lowest resistance of any helically wound wire. To accomplish this, MSD use's a copper alloy conductor due to its great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) "choke".

Heli-Core Wires
The MSD Heli-Core Ignition Wires are perfect for passenger cars, tow vehicles and performance cars. The wires are 8mm and can be relied on to deliver all the high voltage your engine needs! Heli-Core wires feature a stainless steel conductor that is wound around a special glass core. The stainless conductor provides a low resistance path for high voltage to flow while keeping Electro Magnetic Interference (EMI) to a minimum. By winding the conductor around a special glass inner core, the EMI is suppressed inside the wire where it cannot interfere with other electronic devices on your vehicle.

Heli-Core Wires also prevent a phenomenon known as Inductive crossfire. When two wires are routed close to each other and happen to follow the firing order of the engine, the spark from one wire could be induced into the other wire. This would cause the other cylinder to ignite far advanced and will cause detonation. For example, the firing order of a small block Chevrolet is 1-8-4-3-6-5-7-2. Notice that cylinders 5 and 7 are next to each in both the firing order and the in their position in the block. If the spark from the number 5 plug wire is induced into the number 7 wire, a spark will occur in the cylinder causing detonation. Sooner or later engine damage will occur.

MSD Spark Plug Wires prevent inductive crossfire with MSD's special winding procedure and center core material. The EMI and voltage is held within the wire and is transferred only to the plug!

Assembled No
Brand MSD Ignition
Coil Wire Included Yes
Diameter (mm) 8.50mm
Distributor Boot Color Gray
Distributor Boot Material Silicone
Distributor Terminal Ends Male/HEI and Female/Socket
Part Type Spark Plug Wire Sets
Product Line MSD 8.5mm Super Conductor Spark Plug Wire Sets
Quantity Sold as a set.
RFI Suppression Yes
Spark Plug Boot Color Gray
Spark Plug Boot Ends Eight 90 degree
Spark Plug Boot Material Silicone
Wire Color Red

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