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Moroso Ultra 40 Race Ignition Wire Sets

4.72 out of 5 stars 130 Customer Reviews

Moroso new Ultra 40 Race ignition wire sets are the most powerful and RFI/EMI-resistant wires available for racing today. Features of these 8.65mm wires include a K
Moroso new Ultra 40 Race ignition wire sets are the most powerful and RFI/EMI-resistant wires available for racing today. Features of these 8.65mm wires include a Kevlar® core that's four times stronger than Aramid cores, a class-leading 40 ohms of resistance per foot, nickel copper alloy conductors for superior spark energy transfer, an extra-thick EPDM layer for greater dielectric strength, high-temperature silicone boots that can withstand heat up to 600 degrees, and locking stainless steel plug terminals. Plus, their closely woven fiberglass, silicone-impregnated insulation provides up to 8,000 extra volts of pro
Moroso new Ultra 40 Race ignition wire sets are the most powerful and RFI/EMI-resistant wires available for racing today. Features of these 8.65mm wires include a Kevlar® core that's four times stronger than Aramid cores, a class-leading 40 ohms of resistance per foot, nickel copper alloy conductors for superior spark energy transfer, an extra-thick EPDM layer for greater dielectric strength, high-temperature silicone boots that can withstand heat up to 600 degrees, and locking stainless steel plug terminals. Plus, their closely woven fiberglass, silicone-impregnated insulation provides up to 8,000 extra volts of protection, and their extra-thick diameter extends wire life by adding additional insulation against heat, chaffing, and contaminants.

Results 1 - 25 of 76

Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 90 Degree Boots, Chevy, Set

Part Number: MOR-73820

5.0 out of 5 stars ( 2 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 135 Degree Boots, Universal V8, Set

Part Number: MOR-73816

4.75 out of 5 stars ( 4 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, Under Header, BBC, HEI, V8, Set

Part Number: MOR-73616

5.0 out of 5 stars ( 21 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, GM, V8, Set

Part Number: MOR-73607

4.29 out of 5 stars ( 17 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 90 Degree Boots, Chevy, Set

Part Number: MOR-73818

5.0 out of 5 stars ( 5 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 90 Degree Boots, Universal V8, Set

Part Number: MOR-73814

Not Yet Reviewed

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 180 Degree Boots, Universal V8, Set

Part Number: MOR-73839

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 135 Degree Boots, Ford, Mercury, 460, Set

Part Number: MOR-73628

5.0 out of 5 stars ( 2 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, GM, V8, Set

Part Number: MOR-73602

4.79 out of 5 stars ( 14 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, Under Header, Chevy, Big Block, Set

Part Number: MOR-73617

5.0 out of 5 stars ( 3 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, Straight Boots, Chevy, GMC, 454, V8, Set

Part Number: MOR-73615

5.0 out of 5 stars ( 5 )

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Spark Plug Wires, Assembled, Spiral Core, 8.65mm, Black, Male/HEI, 135 Degree Plug Boots, Ford, 351W, Set

Part Number: MOR-73822

4.75 out of 5 stars ( 4 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, Chevy, Big Block, Jesel Front Drive Distributor, Set

Part Number: MOR-73843

Not Yet Reviewed

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Spark Plug Wires, Assembled, Spiral Core, 8.65mm, Black, Straight Plug Boots, Chevy, GMC, Big Block, Set

Part Number: MOR-73819

4.0 out of 5 stars ( 2 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 135 Degree Boots, Universal, V8, Set

Part Number: MOR-73802

5.0 out of 5 stars ( 8 )

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 135 Degree Boots, Ford, Mercury, 351W, Set

Part Number: MOR-73626

3.75 out of 5 stars ( 4 )

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Spark Plug Wires, Assembled, Spiral Core, 8.65mm, Black, 90 Degree Plug Boots, Chevy, Big Block, Set

Part Number: MOR-73821

Not Yet Reviewed

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, Straight Boots, Universal, V8, Set

Part Number: MOR-73801

5.0 out of 5 stars ( 2 )

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Spark Plug Wires, Ultra 40 Race, Spiral Core, 8.65mm, Red, 90 Degree Boots, V8, Set

Part Number: MOR-73810

Not Yet Reviewed

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, Chevy, Small Block, Jesel Front Drive Distributor, Set

Part Number: MOR-73842

4.0 out of 5 stars ( 1 )

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Spark Plug Wires, Ultra 40 Race, Spiral Core, 7mm, Black, Sleeved, 45 Degree Boots, Chevy, V8, 6.2L, Set

Part Number: MOR-73848

Not Yet Reviewed

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Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Blue, 90 Degree Boots, GM/Studebaker, V8, Set

Part Number: MOR-73600

Not Yet Reviewed

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Spark Plug Wire Sets, Ultra 40 Race Ignition Wires, Assembled, Coil Pack, Spiral Core, Black, 8.65mm Diameter, Chevrolet, Small Block LS, Set

Part Number: MOR-73845

4.6 out of 5 stars ( 5 )

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Spark Plug Wire Sets, Ultra 40 Race Ignition Wires, Assembled, Male/HEI, Spiral Core, Black, Fits GM HEI Crab-style Cap Only, Chevrolet, GMC, V8, Set

Part Number: MOR-73832

5.0 out of 5 stars ( 1 )

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Spark Plug Wires, Ultra 40 Race, Assembled, Spiral Core, 8.65mm, Black, Chevy, GMC, Small Block, Set

Part Number: MOR-73825

Not Yet Reviewed

Estimated Ship Date: Jul 18, 2025 if ordered today

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Estimated Ship Date: Jul 18, 2025 if ordered today

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