Moroso Ultra 350 8mm Multi-Angle Boot Spark Plug Wire Set – Red (GM Big Block Chevy 366-454 HEI-Style w/o Coil In Cap)
The Moroso Ultra 350 8mm Spark Plug Wire Set in Red is a premium ignition upgrade for GM Big Block Chevy (BBC) 366-454 engines equipped with HEI-style distributors without a coil-in-cap. These high-performance wires feature an 8mm silicone jacket with multi-angle boots for easy routing and a secure fit in tight engine bays. The Ultra 350 wires deliver excellent conductivity, superior spark energy, and maximum resistance to heat, abrasion, and electrical interference.
The vibrant red finish adds a bold, performance-oriented appearance while the high-quality construction ensures reliable performance under high RPM and high-heat conditions. Ideal for classic muscle cars, street rods, or high-horsepower BBC builds where dependable ignition and striking looks are desired.
Key Features
- 8mm Ultra 350 Construction – High-conductivity core with excellent spark delivery
- Multi-Angle Boots – Allows flexible routing and secure connection for HEI-style caps without coil-in-cap
- Heavy-Duty Silicone Jacket – Superior heat and abrasion resistance
- Red Finish – Bold, performance-oriented appearance
- GM BBC HEI-Specific – Direct fit for 366-454 Big Block Chevy with HEI-style distributor (no coil-in-cap)
| Spec | Detail |
|---|---|
| Part Number | 52039 |
| Brand | Moroso |
| Type | Ultra 350 8mm Spark Plug Wire Set |
| Compatibility | GM Big Block Chevy 366-454 with HEI-Style Distributor (no coil-in-cap) |
| Wire Diameter | 8mm |
| Boot Style | Multi-Angle |
| Color | Red |
| Country of Origin | United States |
| Warranty | Moroso Limited Warranty |
Whats Included
- Complete Set of 8 Spark Plug Wires
- Multi-angle boots for easy installation
Product Notes
- Designed for GM Big Block Chevy 366-454 engines with HEI-style distributor (no coil-in-cap)
- Provides improved spark energy and resistance to heat and interference
- Professional installation recommended for proper routing and connection
Installation Notes
- Direct replacement for factory spark plug wires
- Route wires away from heat sources and secure properly
- Estimated time: 30–60 minutes
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| Various | Chevrolet | Big Block Chevy Applications | 366-454 BBC with HEI-Style Distributor (no coil-in-cap) | 8mm Ultra 350 Spark Plug Wire Set (Red) |
Why Choose Moroso Ultra 350 Spark Plug Wires?
- High-conductivity 8mm wires with multi-angle boots for reliable spark delivery
- Superior heat and abrasion resistance for high-performance applications
- Vibrant red finish that adds a performance look to the engine bay
Frequently Asked Questions
-
Q: Will this wire set fit my 1970 Chevrolet Chevelle with a 454 BBC and HEI distributor without coil-in-cap?
A: Yes, it is designed for GM Big Block Chevy 366-454 engines with HEI-style distributor (no coil-in-cap). -
Q: Are these wires pre-cut or universal?
A: They are a pre-terminated set specifically for GM BBC HEI applications with multi-angle boots. -
Q: Is professional installation recommended?
A: Recommended for proper routing and to avoid cross-firing or heat damage.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure Moroso retail packaging
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine Products
Ignition
Upgrade your vehicle with high-quality ignition parts from Black Ops Auto Works. This collection features premium spark plugs, ignition coils, ignition wire sets, distributors, sensors, and ignition components designed to improve engine performance, reliability, and efficiency across a wide range of vehicles. Ignition Parts from Top Performance Brands Browse trusted brands known for performance and reliability, including: NGK spark plugs HKS spark plugs MSD ignition components Granatelli ignition wires and coils Ford Performance ignition parts Moroso ignition wire sets Mishimoto ignition coils Cobb tuning ignition and sensor components These brands are engineered for street, performance, racing, and high-horsepower applications. Complete Ignition System Components Find everything you need to maintain or upgrade your ignition system, including: Spark plugs (iridium, platinum, and performance options) Ignition coils and coil packs Spark plug wire sets Distributors and distributor c...
View Ignition Products
Moroso
Shop Moroso performance parts at Black Ops Auto Works, your trusted source for Moroso oil pans, oiling system components, oil pumps, oil pump pickups, breather tanks, catch cans, valve covers, racing oil filters, radiator caps, and cooling accessories. Moroso is one of the most recognized names in motorsports and high-performance automotive parts, trusted by racers and builders for durability, precision, and race-proven performance. Whether you are building a drag car, road race car, street performance vehicle, LS swap, Coyote build, or custom engine setup, Moroso products deliver the oil control, crankcase ventilation, and engine support serious enthusiasts demand. Shop Moroso Oil Pans, Catch Cans & Racing Parts At Black Ops Auto Works, we carry a wide selection of Moroso racing and performance parts for oiling, cooling, and engine bay upgrades. Popular Moroso Product Categories: Moroso Oil Pans – Wet sump and dry sump oil pans for drag racing, road racing, and performance st...
View Moroso Products
Spark Plug Wire Sets
Welcome to our Spark Plug Wire Sets collection, where quality meets performance! A reliable set of spark plug wires is essential for optimal engine efficiency, ensuring that your vehicle runs smoothly and effectively. Discover our carefully curated selection of top-performing spark plug wire sets that cater to various models and makes. Why Choose Our Spark Plug Wire Sets? Durability: Our wires are built to withstand high temperatures and resist wear and tear, ensuring longevity. Enhanced Performance: Experience improved ignition efficiency and engine performance with our high-quality wire sets. Easy Installation: Designed for a hassle-free fit, our spark plug wire sets offer straightforward installation. Compatibility: Choose from a wide range of spark plug wire sets compatible with various vehicle makes and models. Explore Our Products Browse through our collection of Spark Plug Wire Sets to find the perfect match for your vehicle: Standard Spark Plug Wire Sets High-Perfor...
View Spark Plug Wire Sets Products


