BANG4BUCK 8Pcs Ignition Coils Pack UF271 + 8 Spark Plug Wires - Whole

In this review the reviewer looks at the BANG4BUCK complete ignition coil and spark plug wire kit, built as a one-stop replacement for 8 cylinders. The bottom line: this kit is ideal for owners who need a full, direct-fit swap to restore engine smoothness and solve idle jitter without sourcing parts individually. The pack includes eight D581 UF271 square ignition coils plus an 8-piece spark plug wire set and a wire separator loom, and the most compelling reason to buy is the immediate improvement in throttle response and reduced misfire when compared to aging coils.

Key Features

• Complete replacement: The kit contains 8 D581 UF271 ignition coils, a full 8-piece spark plug wire set and a wire separator loom so a whole-engine replacement is possible in one job.
• High voltage output: UF271 coils are designed to provide an instantaneous voltage rise to more than 45,000 volts, which helps reduce idle speed issues and engine jitter caused by worn coils.
• Materials and construction: Square ignition coils use pure copper windings and epoxy for thermal stability, intended to improve throttle response and gas mileage over degraded factory coils.
• Spark wire design: Spark plug wires use fiberglass braid and a carbon impregnated fiberglass core to deliver strength and consistent conductivity for stable ignition.
• Fitment clarity: The pack lists multiple replacement part numbers (12556893, 12558693, 12570553, 3859078 and others) to help buyers confirm direct fit before purchase.
• Warranty support: A 12 month warranty offers free replacement or refund if any item is defective, giving extra assurance for a full set purchase.

Who It's For

The kit is aimed at owners of compatible Cadillac, Chevrolet and GMC trucks and SUVs who need to replace all eight coils and wires at once, or anyone repairing a misfire that could be caused by multiple failing coils. It is useful for DIY mechanics who prefer a single-package solution and for fleet managers who want consistent parts across multiple vehicles.

Shoppers who require OE branded parts with long proven lifespans, or who need a single coil replacement rather than a full set, should look elsewhere; some users reported variable longevity and occasional early failures, so those seeking an extended OEM-backed lifetime may prefer dealer parts.

Pros & Cons

Pros

• Full eight-coil and eight-wire kit simplifies installation and eliminates mismatched parts.
• High voltage UF271 design aims to restore idle stability and reduce misfire for better engine performance.
• Materials like copper windings and epoxy help with improved throttle response and fuel economy.
• Comes with a 12 month warranty to replace defective items at no extra cost.

Cons

• Build quality is mixed in real-world reports, with some buyers experiencing premature failures within months.
• Wire length and fit may require verification for some applications, so careful fitment checking is necessary before purchase.

Specifications

Brand	B4B BANG 4 BUCK
Contents	8 D581 UF271 ignition coils, 8 spark plug wires, wire separator loom
Replacement part numbers	12556893, 12558693, 12570553, 3859078, 38590782, 392889925, D581, UF271
Wire replacements	Direct replacement for 748UU, 12622553, 12656210
Warranty	12 months free replacement or refund for defective items
Coil construction	Pure copper coils with epoxy

Our Verdict

The BANG4BUCK full 8-coil and wire kit is a practical, cost-effective option for replacing all ignition components at once and can noticeably improve idle smoothness and throttle response. It offers good value for drivers who need a bulk replacement and want immediate gains in engine performance, but buyers should confirm fitment and be aware that real-world longevity reports vary, so keep the 12 month warranty in mind.

Frequently Asked Questions

Will this kit fit my vehicle?
Check the listed replacement part numbers against your vehicle coils before buying to ensure direct fitment.

Does the kit include a warranty?
Yes, the kit includes a 12 month warranty for free replacement or refund on defective items.

Are the spark plug wires OE quality?
Wires use fiberglass braid and carbon impregnated fiberglass core for improved strength and conductivity but may differ from original factory branded wires.