MAS Ignition Coil Kit UF271 with 8 ACDelco Platinum Spark Plugs & 8.5mm Wires — Chevy/GMC V8 Tune-Up Kit

MAS offers a complete 8-coil replacement kit (UF271 square coils) bundled with eight ACDelco platinum spark plugs and an 8.5mm wire set to restore ignition performance on compatible Chevy, GMC and Hummer V8 models.

If your V8 is showing misfires, rough idle, or diagnostic trouble codes related to coils or ignition circuits, this MAS kit gives you the typical parts fleet technicians replace together: matched ignition coils, quality OEM-style ACDelco platinum plugs, and an 8.5mm spark plug wire set. The package is designed as a one-stop swap for model years and engine applications listed in the fitment details; however, you must verify the coil style (square UF271 vs round UF262) and part interchange numbers before ordering to ensure proper fit.

Which vehicles and engines will these MAS UF271 coils and parts fit?

This kit is intended for a range of late-1990s to mid-2000s Chevrolet, GMC and Hummer V8 applications. It covers many 4.8L, 5.3L and 6.0L naturally aspirated engines across Silverado, Sierra, Tahoe, Suburban, Yukon, Avalanche, Escalade and H2 platforms.

• Commonly compatible years: late 1990s through 2007 models (see fitment list).
• Engine sizes: primarily 4.8L, 5.3L, 6.0L V8 NA engines.
• Replaceable part numbers included: UF271, 52-1618, 5C1083 and many OEM cross-references.
• Important: confirm VIN, engine code or coil shape to avoid ordering the wrong coil style.

How will replacing all eight coils, plugs and wires help my truck?

Changing coils, plugs and wires together minimizes layered ignition issues and ensures even performance across cylinders. New coils restore reliable spark delivery, ACDelco platinum plugs provide consistent electrode life, and matched 8.5mm wires ensure clean electrical transfer between components.

• Reduces misfires and rough idle caused by failing coils or worn plugs.
• Improves throttle response and smoothness when cylinders fire consistently.
• Prevents diagnostic confusion by replacing all ignition components at once.
• Saves labor time compared with piecemeal replacements.

What exactly comes in the MAS replacement kit and what warranty is included?

The package contains eight MAS UF271 square ignition coils, eight ACDelco 6-series platinum spark plugs, and an 8.5mm spark plug wire set—enough to service an entire V8 ignition system. MAS backs the set with a one-year limited warranty against manufacturing defects.

• Complete hardware for an 8-cylinder ignition refresh.
• Platinum spark plugs modeled after OEM spec for durability.
• One-year limited warranty from MAS for covered defects.
• Detailed part cross-reference list included to verify fitment.

How do I confirm these parts will fit my vehicle before ordering?

Use the interchangeable part numbers and your vehicle’s year, make, model, engine size and VIN to cross-check fitment. Manufacturers sometimes switched coil styles mid-year, so verify whether your vehicle requires the square UF271 coils or the round UF262 design.

• Check the listed compatible part numbers against your OEM part.
• Confirm coil shape (square UF271 vs round UF262) on your engine.
• Match vehicle year, engine displacement and VIN where possible.
• Contact the seller with VIN or photos if uncertain before purchase.

Who this kit is for: This MAS ignition kit is aimed at owners and technicians maintaining late-90s to mid-2000s GM V8 trucks and SUVs who want a full-system ignition refresh—especially when resolving misfires or performing preventative maintenance. It’s suitable for DIY mechanics comfortable verifying fitment details, aftermarket installers replacing all ignition components at once, and fleet operators standardizing parts for common Chevy/GMC/Hummer V8 applications. Always verify compatibility with your vehicle’s specific part numbers and coil shape before buying to ensure a correct fit.