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Moroso

Moroso GM LS Ignition Wire Set - Ultra 40 - Sleeved - 12in - Blue

$193.99

SKU: M00R 73536

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Moroso Ultra 40 Race ignition wire set is a high-performance ignition component designed for racing applications. These 7mm wires feature a spiral core conductor for superior spark energy transfer and RFI suppression. The set includes eight 180-degree straight boots with silicone construction for durability and heat resistance up to 600 degrees.
Show original supplier description

Part #: 73536

Spark Plug Wire Set - Ultra 40 - Spiral Core - 7 mm - Sleeved - Blue - Factory Style Boots / Terminals - 12 in Wire Long - GM LS-Series - Kit

Vehicle Symptoms
  • Engine misfire under load
  • Rough idle at high RPM
  • Loss of power during acceleration
  • Hesitation or stumbling on throttle
  • Spark plug wire arcing visible at night
Diagnostic Codes
  • P0300 – Random or multiple cylinder misfire Det
  • P0301 – Cylinder 1 misfire Det
  • P0302 – Cylinder 2 misfire Det
  • P0303 – Cylinder 3 misfire Det
  • P0304 – Cylinder 4 misfire Det
  • P0305 – Cylinder 5 misfire Det
  • P0306 – Cylinder 6 misfire Det
  • P0307 – Cylinder 7 misfire Det
  • P0308 – Cylinder 8 misfire Det
Relevant Conversations
  • Moroso Ultra 40 spark plug wires review
  • Best ignition wires for LS1 engine
  • LS swap misfire after new cam
  • P0300 on LS engine fix
  • 7mm spiral core vs 8.5mm race wires
  • How to install Moroso 73536 wires
  • Moroso Ultra 40 vs MSD Super Conductor
  • Rough idle after cold start LS
  • High RPM misfire on track day
  • Moroso ignition wire set for LS3

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMoroso
Part NumberM00R 73536
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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