YEHERIT UF413 Ignition Coil Kit — 8pc Coils, Wires & Plugs

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GRADE: SEALED — Factory sealed. Original packaging undamaged. Condition: Factory sealed. Original packaging undamaged. This YEHERIT UF413 ignition coil kit is a complete, factory-s ealed 24-piece ignition system overhaul bundle. It includes 8 square UF413 ignition coils, 8 red 8mm spark plug wires, and 8 iridium spark plugs. The kit is designed for GM V8 engines displacing 4.8L, 5.3L, 6.0L, and 6.2L. It delivers a one-stop solution for restoring smooth engine performance and fuel efficiency. The UF413 coils feature a distinctive square body shape. This is a critical detail — the UF413 is square, not round like the UF414. Always verify your existing coil shape before purchasing. Alternate part numbers include C1511, D510C, D513A, 5C1554, E893, 52-1819, 12570616, and 12611424. Each coil arrives in pristine, factory-sealed condition with zero signs of use or handling. The black polymer housing is flawless and connector tabs are perfectly intact. The 8mm copper-core spark plug wires are bright red and generously cut for easy routing. Wire part numbers include 9748UU, 9748HH, 9748RR, M8-48322R, 88862385, 12622553, and 12656210. Copper-core construction provides exceptional electrical conductivity. The wires feature heat-resistant jacketing designed to survive the high-temperature environment near a V8 engine block. Corrosion-resistant terminals ensure a reliable connection at both the coil boot and the spark plug boot for the life of the part. The 41-962 iridium spark plugs (OE part 19299585) round out the kit perfectly. Iridium-tipped electrodes run cooler and fire more consistently than standard copper plugs. Each plug arrived sealed in its individual white box, untouched and factory fresh. The fine-wire iridium tip produces a powerful, focused spark that ignites the air-fuel mixture more completely. This translates directly into stronger throttle response, smoother idle, and improved fuel economy across all operating conditions. Fitment for this ignition coil bundle is broad and well-documented. Compatible vehicles include the Chevy Avalanche, Corvette, Impala, Tahoe, Express, Silverado, and Suburban. GMC fitment covers the Canyon, Envoy, Yukon, Savana, and Sierra. Cadillac CTS and Escalade owners will find this kit directly applicable. Buick LaCrosse and Rainier models are also supported, as are the Hummer H2 and H3. Always cross-reference your engine size and existing coil shape before installation to confirm fitment. Refer to the product photos included with this listing for a detailed compatibility chart. A failing ignition system causes a cascade of drivability problems. Symptoms include rough idle, engine misfires, stumbling acceleration, and reduced fuel economy. Electrical gremlins and even check engine lights often trace back to worn coils or degraded spark plug wires. Replacing the entire ignition set — coils, wires, and plugs together — eliminates all failure points at once. This coil kit resolves those issues while elevating overall engine performance. Learn more about how ignition coils work by visiting the Ignition Coil Wikipedia page. Like-new condition — no scratches, wear, or handling marks visible on any component. The coils, wires, and plugs all arrived in their original factory-sealed state and have been stored properly. This is an ideal buy for the DIY mechanic or shop technician who wants guaranteed-fresh ignition components at a below-retail price. Browse more parts and accessories in our Explore our Automotive Collection. Frequently Asked Questions Question 1: What is the difference between the UF413 and the UF414 ignition coil? Answer 1: The UF413 and UF414 are both GM ignition coils, but they have different body shapes and are not interchangeable. The UF413 features a square body, while the UF414 has a round body. Always inspect your existing coils or consult your vehicle's service manual to confirm which shape your engine uses before ordering. Installing the wrong coil shape will result in a fitment failure and potential damage to the connector harness. Question 2: Will this ignition coil kit fit my Chevy Silverado with a 5.3L engine? Answer 2: This kit is fully compatible with the Chevy Silverado equipped with a 5.3L V8 engine that uses the square UF413-style coils. It also covers Silverado variants with 4.8L, 6.0L, and 6.2L engines that share the same square coil design. Verify the coil shape on your specific truck before purchasing, as some model years used the round UF414 instead. Cross-referencing your current part numbers against the list in the product description is the most reliable confirmation method. Question 3: Why should I replace my spark plug wires at the same time as my ignition coils? Answer 3: Spark plug wires degrade over time just like ignition coils, and worn wires can cause misfires even after new coils are installed. Replacing both simultaneously eliminates all weak links in the ignition circuit at once, saving labor time since you are already accessing the same components. This kit bundles coils, wires, and iridium spark plugs together for exactly this reason — a complete system refresh in a single purchase. Doing the full replacement at once also provides a clean baseline for future diagnostics. Question 4: What are the benefits of iridium spark plugs over standard copper plugs? Answer 4: Iridium spark plugs feature a fine-wire center electrode that concentrates the ignition spark into a smaller, more powerful arc. This focused spark ignites the air-fuel mixture more completely, resulting in more efficient combustion and better throttle response. Iridium is an extremely hard and heat-resistant metal, so these plugs last significantly longer than conventional copper plugs under normal driving conditions. The included 41-962 iridium plugs are OE-spec replacements that meet the exact requirements of GM's 4.8L through 6.2L V8 engines. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is the difference between the UF413 and the UF414 ignition coil?","acceptedAnswer":{"@type":"Answer","text":"The UF413 and UF414 are both GM ignition coils, but they have different body shapes and are not interchangeable. The UF413 features a square body, while the UF414 has a round body. Always inspect your existing coils or consult your vehicle's service manual to confirm which shape your engine uses before ordering. Installing the wrong coil shape will result in a fitment failure and potential damage to the connector harness."}},{"@type":"Question","name":"Will this ignition coil kit fit my Chevy Silverado with a 5.3L engine?","acceptedAnswer":{"@type":"Answer","text":"This kit is fully compatible with the Chevy Silverado equipped with a 5.3L V8 engine that uses the square UF413-style coils. It also covers Silverado variants with 4.8L, 6.0L, and 6.2L engines that share the same square coil design. Verify the coil shape on your specific truck before purchasing, as some model years used the round UF414 instead. Cross-referencing your current part numbers against the list in the product description is the most reliable confirmation method."}},{"@type":"Question","name":"Why should I replace my spark plug wires at the same time as my ignition coils?","acceptedAnswer":{"@type":"Answer","text":"Spark plug wires degrade over time just like ignition coils, and worn wires can cause misfires even after new coils are installed. Replacing both simultaneously eliminates all weak links in the ignition circuit at once, saving labor time since you are already accessing the same components. This kit bundles coils, wires, and iridium spark plugs together for exactly this reason — a complete system refresh in a single purchase. Doing the full replacement at once also provides a clean baseline for future diagnostics."}},{"@type":"Question","name":"What are the benefits of iridium spark plugs over standard copper plugs?","acceptedAnswer":{"@type":"Answer","text":"Iridium spark plugs feature a fine-wire center electrode that concentrates the ignition spark into a smaller, more powerful arc. This focused spark ignites the air-fuel mixture more completely, resulting in more efficient combustion and better throttle response. Iridium is an extremely hard and heat-resistant metal, so these plugs last significantly longer than conventional copper plugs under normal driving conditions. The included 41-962 iridium plugs are OE-spec replacements that meet the exact requirements of GM's 4.8L through 6.2L V8 engines."}}]} Upgrading the full ignition system is one of the most cost-effective performance improvements available for high-mileage GM trucks and SUVs. A fresh set of coils restores peak spark energy to every cylinder simultaneously. Combined with new iridium spark plugs, the engine runs at its factory-tuned efficiency level again. The copper-core wires ensure that energy reaches each plug without resistance loss. Together, this UF413 ignition coil bundle addresses every component in the secondary ignition circuit. This sealed kit ships exactly as it left the factory. All eight square coils are present and accounted for. All eight 8mm spark plug wires are intact. All eight iridium spark plugs are individually boxed and undamaged. Purchasing a complete factory-sealed ignition coil set means no surprises on installation day. There is no need to source individual components from multiple vendors or worry about compatibility between mixed-brand parts. Brand YEHERIT Model UF413 ASIN B0DL9F3CB1 Urban Supply Plus · Every item professionally inspected & graded · SKU LPNO456237730 Show more