What is the main benefit of under-header spark plug wires?

Under-header spark plug wires are designed to route cables away from hot exhaust manifolds or headers. This helps prevent the wires from melting or degrading due to heat, ensuring a consistent spark and preventing misfires.

Why do these wires have a 135-degree boot?

The 135-degree boot on the spark plug end provides a different angle for connecting the wire. This can be very helpful in tight engine compartments or when routing wires around obstructions like headers, making installation and removal simpler.

What type of distributor do these wires fit?

This specific wire set is designed for Small Block Chevy (SBC) engines that use an HEI (High Energy Ignition) distributor. It's important to match the distributor type for proper fitment and electrical connection.

Moroso SBC Under Header 135 Deg Plug HEI Ultra Spark Plug Wire Set - Red

Specifications

Brand: Moroso
Part #: 52030
UPC: 84663520303

Moroso SBC Under Header 135 Deg Plug HEI Ultra Spark Plug Wire Set - Red

Name: Moroso SBC Under Header 135 Deg Plug HEI Ultra Spark Plug Wire Set - Red
Brand: Moroso
SKU: moroso-moroso-sbc-under-header-135-deg-plug-hei-ultra-spark-plug-wire-set-red-t14-498233
Price: 50.99 USD
Availability: InStock

$50.99

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits Small Block Chevy (SBC) engines with HEI distributors.
135-degree spark plug boots for easier connection and routing.
Designed to route wires away from hot exhaust headers.
Durable silicone jacket handles engine heat.
Red color for a custom appearance.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This is the Moroso SBC Under Header 135 Degree Plug HEI Ultra Spark Plug Wire Set in red, designed for Small Block Chevy engines with HEI distributors and headers. These wires help route spark plug cables cleanly away from hot exhaust headers, preventing damage and ensuring a reliable spark. The 135-degree boot on the spark plug end makes them easier to connect and disconnect, especially in tight engine bays.

Moroso uses a high-quality conductor and a durable silicone jacket to handle the heat and electrical demands of your engine. The red color adds a custom look under the hood. This set is built to fit SBC engines with HEI distributors, offering a practical solution for managing spark plug wires around exhaust headers.