The most powerful wire ever!
Highest spark energy transfer. Highest EMI/RFI suppression. Highest horsepower gain. The Ultra 40 Race Spark Plug Wire's extra insulation extends spark plug wire life against exhaust header heat, chaffing and contaminants. Closely woven fiberglass, impregnated with high-voltage-leak resistant silicone adds up to 8,000 volts of extra insulation. At 40 ohms of resistance per foot, Moroso Ultra 40 Race Spark Plug Wire incorporates a spiral wound nickel/copper alloy conductor wrapped at the optimum ratio to produce the highest level of spark energy while producing the lowest level of electromagnetic and radio frequency interference. The Kevlar core is four times stronger than other aramid fibers cores, allowing an increase in the tensile strength of the wire while reducing the center diameter and at the same time increasing the surrounding insulation resulting in greater dielectric strength. Features:The standard in high performance ignition wire Optimiized EMI/RFI resistance Used in the highest level of racing applications ranging from dual mag Top Fuel Cars thru NASCAR Sprint Cup Series 7mm or 8.65mm diameter wire with 40 ohms of resistance per foot Incorporates a highly engineered spiral wound conductor Maximizes energy transfer and minimizes electro magnetic interference (EMI) and radio frequency (RF) interference noise Note: Straight plug boot kits are bendable to 45 Degrees.
Highest spark energy transfer. Highest EMI/RFI suppression. Highest horsepower gain. The Ultra 40 Race Spark Plug Wire's extra insulation extends spark plug wire life against exhaust header heat, chaffing and contaminants. Closely woven fiberglass, impregnated with high-voltage-leak resistant silicone adds up to 8,000 volts of extra insulation. At 40 ohms of resistance per foot, Moroso Ultra 40 Race Spark Plug Wire incorporates a spiral wound nickel/copper alloy conductor wrapped at the optimum ratio to produce the highest level of spark energy while producing the lowest level of electromagnetic and radio frequency interference. The Kevlar core is four times stronger than other aramid fibers cores, allowing an increase in the tensile strength of the wire while reducing the center diameter and at the same time increasing the surrounding insulation resulting in greater dielectric strength. Features:
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Small Block Chevy
$158.99
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Ultra 40 Race Spark Plug Wire SetSmall Block Chevy Sleeved Wire Set Non-HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Over Valve Cover 8.65mm
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$158.99
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$157.99
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Ultra 40 Race Spark Plug Wire SetSmall Block Chevy Sleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Over Valve Cover 8.65mm
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Ultra 40 Race Spark Plug Wire SetSmall Block Chevy Sleeved Wire Set Non-HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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Ultra 40 Race Spark Plug Wire SetSmall Block Chevy Sleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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$186.99
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Ultra 40 Sleeved Spark Plug Wire Set Small Block Chevy Jesel Front Drive Distributor 90° HEI Spark Plug Boots Black 8.65mm
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$186.99
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$172.99
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Ultra 40 Sleeved Spark Plug Wire Set Small Block Chevy (Over The Valve Cover) HEI Distributor Cap (Male Post) 90° Spark Plug Boots Black 8.65mm
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$172.99
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$188.99
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Ultra 40 Sleeved Spark Plug Wire SetSmall Block Chevy (Over The Valve Cover) Points Style Distributor Cap (Female Socket) 90° Spark Plug Boots Black 8.65mm
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$188.99
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$172.99
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Ultra 40 Sleeved Spark Plug Wire Set Small Block Chevy (Under The Header) HEI Distributor Cap (Male Post) 90° Spark Plug Boots Black 8.65mm
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$172.99
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$73.99
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Ultra 40 Sprint Car Spark Plug Wire SetSmall Block Chevy Unsleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Blue 8.65mm
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$73.99
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$73.99
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Ultra 40 Sprint Car Spark Plug Wire SetSmall Block Chevy Unsleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Red 8.65mm
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$73.99
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$73.99
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Ultra 40 Sprint Car Spark Plug Wire SetSmall Block Chevy Unsleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Black 8.65mm
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$73.99
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GM LS Series
$72.99
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Ultra 40 Race Spark Plug Wire SetGM LS Series With Aluminum Shields Non-Sleeved Wires Fits Moroso Tall Valve Covers or OEM Valve Covers, OEM and Aftermarket Coils 9.75" Wire Length 7mm Black
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$72.99
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$73.99
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Ultra 40 Race Spark Plug Wire SetGM LS Series With Aluminum Shields Non-Sleeved Wires Fits Moroso Tall Valve Covers or OEM Valve Covers, OEM and Aftermarket Coils 9.75" Wire Length 7mm Red
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$73.99
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$141.99
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Ultra 40 Race Spark Plug Wire SetGM LS Series Sleeved Wire Set Fits Stock or Moroso tall Valve Covers 8" Wire Length 7mm
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$141.99
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$141.99
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Ultra 40 Race Spark Plug Wire SetGM LS Series Sleeved Wire Set Fits Stock or Moroso tall Valve Covers 12" Wire Length 7mm
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$141.99
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$136.99
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Ultra 40 Race Spark Plug Wire SetGM LS Series Sleeved Wire Set Fits Stock or Moroso tall Valve Covers 9.75" Wire Length 7mm
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$136.99
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$116.99
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Ultra 40 Race Spark Plug Wire SetGM LS-Series Engines Universal Wire Kit Unsleeved Wire Set 48'' Wire Lengths 7mm
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$116.99
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$138.99
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$138.99
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$138.99
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$138.99
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$134.99
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Ultra 40 Sleeved Spark Plug Wire SetGM LS Series (Coil On Plug) Short Length Wires (8") Straight Plug Boots Black 7mm
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$134.99
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$138.99
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Ultra 40 Sleeved Spark Plug Wire SetGM LS Series (Coil On Plug) Medium Length Wires (9.75") Straight Plug Boots Black 7mm
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$138.99
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$106.99
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Ultra 40 Sleeved Spark Plug Wire SetGM LS Series (Coil On Plug) 48" Wires Straight Plug Boots Black 7mm
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$106.99
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GM LT Series
$82.99
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Ultra 40 Sleeved Spark Plug Wire Set GM LT Series (Coil On Plug) Matching Plug & Coil Boots Black 7mm
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$82.99
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Big Block Chevy
$158.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set Non-HEI Style Distributor Cap Straight Spark Plug Boot Wires Run Over Valve Cover 8.65mm
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$153.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set HEI Style Distributor Cap Straight Spark Plug Boot Wires Run Over Valve Cover 8.65mm
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$153.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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$158.99
Ships directly from the manufacturer on 05/01/19
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set Non-HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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$158.99
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$179.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set HEI Crab-Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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$179.99
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$172.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set HEI Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers 8.65mm
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$172.99
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$172.99
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Ultra 40 Race Spark Plug Wire SetBig Block Chevy Sleeved Wire Set Non-HEI Crab-Style Distributor Cap 90° Spark Plug Boot Wires Run Under Headers Black/Black boots 8.65mm
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$172.99
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