UF271 Square Ignition Coils and Spark Plugs & 748EE Wires Set

Our review of the UF271 Square Ignition Coils and Spark Plugs & 748EE Wires Set finds it a practical, budget-friendly ignition repair kit for owners of compatible GM V8 trucks and SUVs. The package combines square UF271 coil packs, eight spark plugs and 8mm 748EE spark plug wires so a technician or DIYer can replace a full bank of ignition components in one go. The single biggest reason to buy is the matched set approach: coils and wires designed to work together, which reduces compatibility guesswork when you confirm your vehicle uses the SQUARE coil shape.

Key Features

• Square coil design: Includes UF271/D581 square ignition coils to match vehicles that use that specific coil shape and avoid fitment issues when verified in the engine bay.
• Matched ignition components: The kit ships with coils, 8 spark plugs and 8mm 748EE wires so timing and connection integrity are restored across one bank at once.
• Durable coil construction: Coils are wound with German copper and wrapped in polyester rubber for heat and vibration resistance under typical driving conditions.
• Wide OEM cross-reference: Lists many replacement numbers that help verify compatibility with original equipment part numbers before purchase.
• Broad vehicle coverage: Specified for many Chevrolet, GMC, Hummer, Savana and other GM-family models from late 1990s to mid 2000s, which is useful for older trucks and SUVs.

Who It's For

This kit is aimed at DIY mechanics and independent shops working on GM 4.8L, 5.3L and 6.0L engines that require the square UF271/D581 coil style. It is especially useful when a full-bank ignition service is planned, because it supplies coils, wires and plugs together so components age consistently.

Owners who are unsure about coil shape should not buy without visually confirming the square coils in their engine compartment, and drivers of newer vehicles or non-GM engines should look elsewhere for a direct-fit ignition solution.

Pros & Cons

Pros

• Complete kit approach restores coils, spark plugs and spark plug wires at once for consistent ignition performance.
• Coils built with copper windings and polyester rubber for durability in typical road use.
• Extensive cross-reference list makes it easier to confirm fitment against OEM numbers.

Cons

• Only compatible with the SQUARE UF271/D581 coil shape, so buyers must check their engine before ordering.
• Older vehicle coverage means not suitable for late model or non-GM engines that use different coil designs.

Specifications

Brand	SPARKWHIZ
Coil model	UF271 / D581 (square)
Included components	8 coils?8 spark plugs?8mm 748EE spark plug wires
Compatible engines	4.8L, 5.3L, 6.0L GM V8
Vehicle coverage	Selected Chevrolet, GMC, Hummer, Savana, Mercruiser years (see fitment)
Replacement numbers	12556893, 12558693, C1208 and cross references

Our Verdict

The UF271 Square Coil, Spark Plug and 748EE Wire Set is a sensible value for owners of older GM trucks and SUVs who need a coordinated ignition service. When the square coil shape is confirmed in the engine bay, this matched kit reduces installation guesswork and replaces multiple wear items at once, making it a good buy for DIY repair and routine maintenance.

Frequently Asked Questions

How do I confirm this fits my vehicle?
Open the engine compartment and visually confirm your vehicle uses square UF271/D581 style coils; the listing is specifically for the square variant.

Does the kit include all parts for a full bank replacement?
Yes, the package includes UF271 ignition coils, 8 spark plugs and 8mm 748EE spark plug wires to service a full bank.

Are these OEM parts?
The kit lists many OEM cross-reference numbers to aid fitment, but the components are sold under the SPARKWHIZ brand as aftermarket replacements.