YEHERIT ignition kit for Chevy/GMC V8s — 8 UF414 round coils, 10.4mm silicone wires & 41-110 iridium plugs (4.8L–6.0L)

If your V8 is showing misfires, rough idling, or reduced fuel efficiency, this YEHERIT kit brings the main ignition components together in one package so you can replace aging coils, brittle wires and worn spark plugs at once. The set is built to OE-style fit and specifies the UF414 round coil shape — confirm your vehicle uses round coils (UF414) rather than the square UF413 style before ordering. Included part numbers and broad compatibility make this a convenient, wallet-friendly solution for commonly seen ignition issues on GM trucks and SUVs.

How do these parts restore engine performance?

Worn coils, degraded plug wires and old spark plugs can cause weak sparks and incomplete combustion. Replacing all three at the same time helps re-establish consistent spark energy across cylinders, easing misfires and smoothing acceleration. The iridium plugs provide a long-life electrode, while silicone wires and copper-core construction deliver stable conductivity under heat.

• UF414 round coils engineered for direct replacement and consistent spark output
• 10.4mm silicone spark plug wires with copper core for heat resistance and conductivity
• 41-110 iridium spark plugs for prolonged life and reliable ignition
• Restores more complete combustion, reducing rough idle and improving driveability

Which vehicles and part numbers does this kit fit?

This kit targets a wide range of GM V8 applications — double-check your engine size and coil shape before purchase. It lists fitment for Chevy trucks and SUVs, GMC models, Cadillac CTS and select Buick/Hummer applications; the product page images show model examples and coil shape for verification.

• Common compatible models: Silverado, Suburban, Tahoe, Avalanche, Camaro, Impala, Express
• GMC: Sierra, Yukon, Envoy, Canyon, Savana; Cadillac CTS; Buick LaCrosse, Rainier; Hummer H3
• Included part numbers: UF414, C1512, D514A, 5C1555, E894 and OEM cross references
• Confirm engine displacement (4.8L, 5.3L, 6.0L) and coil is ROUND UF414 prior to ordering

What are the build and durability details to expect?

YEHERIT emphasizes materials and assembly to handle under-hood temperatures and corrosive conditions. The silicone-insulated wires shield the copper core from heat and moisture, while the coils are manufactured to OE-style dimensions. Iridium plugs offer a hard-wearing electrode that resists erosion longer than conventional plugs.

• Silicone insulation for thermal and environmental resistance
• Copper-core conductors for improved electrical conductivity
• Precision coil fit and mounting for secure installation
• Iridium electrodes designed for extended service life

How difficult is installation and what should I check first?

Installation is a straightforward bolt-and-plug swap for technicians and competent DIYers, but correct coil shape and connector match are essential. Inspect your current coils to verify the round UF414 style; if your vehicle uses the square UF413 design, this kit will not fit. Tighten to torque specs and ensure plug gaps are correct for your engine.

• Verify coil shape (round UF414) before removing old components
• Replace one coil/wire at a time to avoid cylinder mislabeling
• Use a torque wrench for spark plug installation and proper sealing
• Refer to vehicle service manual for exact plug gap and torque values

Who this is for: This kit suits owners and mechanics working on GM 4.8L–6.0L V8 engines who want a full ignition refresh in one purchase. It’s ideal when diagnosing intermittent misfires, rough running, or when preventative maintenance calls for replacing coils, wires and plugs together. If your vehicle requires round UF414 coils and the listed cross-references match, this bundle saves time versus sourcing each item separately.