Home / Shop / MSD 8.5mm Super Conductor Spark Plug Wire Sets 31229 Wires, Conductor, Spiral Core, 8.5mm, Red, 90 Degree Boots, Universal, L8/V8, Set

MSD 8.5mm Super Conductor Spark Plug Wire Sets 31229 Wires, Conductor, Spiral Core, 8.5mm, Red, 90 Degree Boots, Universal, L8/V8, Set

SKU: MSD31229

Spark Plug Wire Sets

Msd Ignition

MSD 8.5mm Super Conductor Spark Plug Wire Sets 31229 Wires, Conductor, Spiral Core, 8.5mm, Red, 90 Degree Boots, Universal, L8/V8, Set

SKU: MSD31229

Spark Plug Wire Sets

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

MSD 8.5mm Super Conductor spark plug wire sets feature a special helically wound core that has just 40-50 ohms of resistance per foot—but with an RFI suppression equal to a 1,500 ohm wire. In fact, each foot of finished wire includes 40 ft. of tightly wound copper for superior conductivity. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference "choke." This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle.

A tough, 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps the current guided to the plugs. Underneath the high-temperature boots, dual crimp stainless steel terminals feature snap-locks to ensure a secure fit. Each set comes with clip-on cylinder markers for easy identification. MSD's 8.5mm Super Conductor wire sets are available in custom or universal-fit applications, assembled or not, with a variety of terminal and boot end options.

Part Type

8 Cyl Plug Wires

Data: v4.2 - Upd: 2026-10-15 03:13:17

Specifications

Product Attributes - Brand: MSD Ignition
Product Attributes - Manufacturer's Part Number: 31229
Product Attributes - Part Type: Spark Plug Wire Sets
Product Attributes - Product Line: MSD 8.5mm Super Conductor Spark Plug Wire Sets
Product Attributes - UPC: 085132312290
Product Attributes - Assembled: No
Product Attributes - Distributor Terminal Type: Male/HEI
Product Attributes - Distributor Boot Color: Gray
Product Attributes - Distributor Boot Material: Silicone
Product Attributes - Spark Plug Boot Ends: Eight 90 degree
Product Attributes - Spark Plug Boot Color: Gray
Product Attributes - Spark Plug Boot Material: Silicone
Product Attributes - Diameter (mm): 8.50mm
Product Attributes - Wire Color: Red
Product Attributes - RFI Suppression: Yes
Product Attributes - Coil Wire Included: Yes
Product Attributes - Conductor Style: Spiral core
Product Attributes - Spark Plug Wire Resistance: 50 ohms/ft.
Product Attributes - Quantity: Sold as a set.
Product Attributes - Notes: Includes vice mount wire crimping tool.

Reference Information

Brand Name/s	Msd Ignition
StreetFX SKU	msd31229
SFX Item ID	4974426
Supplier Item Code	4974426
Manufacturer SKU	31229
Manufacturer UPC	85132312290
Alternative References	8.5mm, L8/V8

Compatibility

Application Data

Engine Type L8
Universal Yes
Engine Type V8
Universal Yes

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CID	260
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	4.3L/260
Engine Type	V8
Engine VIN Code	F
Liter	4.3
Make	BUICK
Model	APOLLO
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	H
Liter	5.7
Make	BUICK
Model	APOLLO
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	J
Liter	5.7
Make	BUICK
Model	APOLLO
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CID	260
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	4.3L/260
Engine Type	V8
Engine VIN Code	F
Liter	4.3
Make	BUICK
Model	APOLLO
Region	USA
Submodel	SR

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	H
Liter	5.7
Make	BUICK
Model	APOLLO
Region	USA
Submodel	SR

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1975
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	J
Liter	5.7
Make	BUICK
Model	APOLLO
Region	USA
Submodel	SR

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	H
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	J
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	305
Ending Year	1977
Engine Family	Chevy small block Gen I
Engine Size	5.0L/305
Engine Type	V8
Engine VIN Code	U
Liter	5.0
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CC	5733
CID	350
Ending Year	1977
Engine Family	Chevy small block Gen I
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	L
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	R
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	350
Ending Year	1977
Engine Family	Chevy small block Gen I
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	L
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	R
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1980
CID	301
Ending Year	1980
Engine Family	PONTIAC V8 GAS
Engine Size	4.9L/301
Engine Type	V8
Engine VIN Code	W
Liter	4.9
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1980
CID	305
Ending Year	1980
Engine Family	Chevy small block Gen I
Engine Size	5.0L/305
Engine Type	V8
Engine VIN Code	H
Liter	5.0
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1980
CID	265
Ending Year	1981
Engine Family	PONTIAC V8 GAS
Engine Size	4.3L/265
Engine Type	V8
Engine VIN Code	S
Liter	4.3
Make	BUICK
Model	CENTURY
Region	USA
Submodel	BASE

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	H
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1975
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	J
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CC	5733
CID	350
Ending Year	1977
Engine Family	Chevy small block Gen I
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	L
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CC	5733
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	R
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	350
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	5.7L/350
Engine Type	V8
Engine VIN Code	R
Liter	5.7
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	403
Ending Year	1977
Engine Family	OLDSMOBILE V8 GAS
Engine Size	6.6L/403
Engine Type	V8
Engine VIN Code	K
Liter	6.6
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

Application Notes	Universal Spark Plug Wire Set; Red Super Conductor 8.5mm; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals;
Beginning Year	1977
CID	305
Ending Year	1978
Engine Family	Chevy small block Gen I
Engine Size	5.0L/305
Engine Type	V8
Engine VIN Code	U
Liter	5.0
Make	BUICK
Model	CENTURY
Region	USA
Submodel	CUSTOM

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MSD 8.5mm Super Conductor Spark Plug Wire Sets 31229 Wires, Conductor, Spiral Core, 8.5mm, Red, 90 Degree Boots, Universal, L8/V8, Set

MSD 8.5mm Super Conductor Spark Plug Wire Sets 31229 Wires, Conductor, Spiral Core, 8.5mm, Red, 90 Degree Boots, Universal, L8/V8, Set

Description

Part Type

Specifications

Reference Information

Compatibility

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