Product Specifications
| Parameter | Details |
|---|
| Part Name | Spark Plug |
| Part Number (OEM Reference) | 4955850, 4937472, 5473010 |
| Brand Compatibility | Cummins |
| Machine Model Fitment | C GAS PLUS CM556, C8.3 G, ISB5.9G CM2180, ISC8.3 G CM2180, ISC8.3 G CM2180 C101, ISL G CM2180, L GAS PLUS CM556, L9N CM2380 L124B, QSL9 G CM558 |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual anti-static box + protective foam + sturdy export carton |
Compatible Models
| Brand | Applicable Models |
|---|
| Cummins | C GAS PLUS CM556, C8.3 G, ISB5.9G CM2180, ISC8.3 G CM2180, ISC8.3 G CM2180 C101, ISL G CM2180, L GAS PLUS CM556, L9N CM2380 L124B, QSL9 G CM558 |
Tired of Misfiring Gas Engines? Get the Right Cummins Spark Plug for ISL G and QSL9 G CM558
Gas-powered construction equipment—especially Cummins ISL G and QSL9 G CM558 engines—shuts down fast with weak or inconsistent spark. A single faulty plug causes rough idle, power loss, and unburned fuel that damages catalytic systems. OEM replacements take weeks to arrive, while low-grade aftermarket plugs fail within 500 operating hours—costing fleets thousands in downtime and rework.
OEM-Equivalent Quality, Ready to Ship
This Cummins spark plug meets original torque, heat range, and electrode gap specifications for reliable ignition across high-load gas engine cycles. Built by ISO-certified factories and tested pre-shipment for resistance, thermal stability, and dielectric strength. Used by fleet operators maintaining excavators, articulated haulers, and stationary generators where consistent combustion is non-negotiable.
Where This Part Works
These spark plugs operate under demanding conditions: landfill compactors running on natural gas, quarry haul trucks with frequent load cycling, port material handlers exposed to salt air, and municipal refuse collection vehicles with stop-start duty cycles. In all cases, precise ignition timing prevents pre-ignition and misfire-induced cylinder washdown—critical for maintaining oil integrity and emission compliance in Cummins C8.3 G and ISL G platforms.
Engineering Details That Matter
The iridium-enhanced center electrode ensures stable arc initiation at low cranking speeds and resists erosion over 12,000+ miles of operation. The nickel-alloy ground electrode maintains exact gap tolerance (0.028–0.031 in / 0.7–0.8 mm) even after thermal cycling. Ceramic insulator composition meets SAE J551 standards for dielectric strength above 40 kV. Hex size and thread pitch (14 mm × 1.25 mm) match OEM dimensions for direct interchange—no adapter or torque adjustment needed. Triple-seal design prevents combustion gas leakage into the spark plug well, protecting coil boots from carbon tracking.
The Real Cost of Wrong Parts
A $3.50 counterfeit spark plug may save upfront—but leads to lean misfires, elevated NOx emissions, and premature catalyst failure. Industry data shows incorrect heat range selection increases unplanned maintenance frequency by 3.2×. Cummins service bulletins require spark plugs meeting CM558/CM2180 ignition system impedance specs; non-compliant parts void emission warranty coverage. Total cost of ownership drops when you invest in verified replacement parts backed by real-world performance testing—not just catalog numbers.
Why Customers Trust XUNPO
- Only partner with ISO 9001-certified manufacturers; incoming raw materials inspected per AQL 1.0
- 100% functional spark test performed before shipment: voltage hold, resistance, and gap verification
- 3–12 month warranty covering manufacturing defects—no questions asked for verified claims
- 10 years exporting to 120+ countries, including repeat orders from U.S. rental fleets and EU municipal repair centers
- 20+ technical staff trained in Cummins gas engine service manuals; part verification response within 2 hours
- Guangzhou warehouse holds 10,000+ SKUs—including this Cummins spark plug—ready for same-day dispatch
Packaging & Shipping
- Each spark plug sealed in anti-static blister pack with foam insert inside a reinforced corrugated box
- In-stock items ship within 2–5 working days after payment confirmation
- Flexible logistics: DHL/FedEx/UPS express (3–7 days), air freight (7–12 days), sea freight (25–40 days)
- Real-time tracking number provided upon dispatch via email and WhatsApp
- MOQ is 1 piece—ideal for urgent field repairs or diagnostic validation
Get Your Cummins Spark Plugs Now
Your ISL G or QSL9 G CM558 engine shouldn’t wait weeks for ignition reliability. Send us your part number (4955850 / 4937472 / 5473010), machine model, and required quantity—we’ll email a competitive quote within 24 hours. First-time buyers can request a sample for bench testing before bulk order. Every hour your engine sits idle costs money; act now to restore uptime.
Frequently Asked Questions
Q: Is this an original Cummins part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket spark plug, manufactured by ISO 9001-certified facilities to meet Cummins ignition system specifications for heat range, gap, and dielectric performance.
Q: How do I confirm if this spark plug fits my specific engine?
A: Provide your full engine model and control module number (e.g., ISL G CM2180 or QSL9 G CM558)—our technical team will verify compatibility and reply within 2 hours.
Q: What is the warranty period?
A: 3–12 months from date of delivery, covering defects in materials or workmanship. Claims require photo evidence and brief operational context.
Q: What is the minimum order quantity?
A: 1 piece—no exceptions. We support urgent maintenance needs without forcing bulk purchases.
Q: How long does shipping take?
A: In-stock items ship within 2–5 working days. Express courier delivery takes 3–7 days to most destinations; air and sea options available upon request.
Q: Can I receive a sample before placing a large order?
A: Yes—first-time customers are eligible for sample testing. Contact us via WhatsApp or email to arrange.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 187 2205 7128 | Email: talos@xunpojx.com
