Denso Spark Plugs SK20R11 Pack of 4 — OEM-fit replacement, pre-gapped for reliable ignition

If your vehicle requires the Denso 3297 (SK20R11) plug, this factory-original four-pack offers the same design, materials, and packaging used by OEM suppliers. These plugs are sold as direct-replacement components intended to fit applications calling for the SK20R11 specification; the set includes original DENSO packaging and mounting hardware where applicable. Always verify fitment with your vehicle by using the retailer's confirmed-fit tool before installation.

How do these Denso plugs match my vehicle's original equipment?

Each SK20R11 in this four-pack is manufactured to the dimensional and material standards DENSO supplies to automakers, so thread reach, heat range, and electrode design align with factory expectations. That means straightforward swap-in replacement without modifying the ignition system. Use the vehicle fitment checker to confirm compatibility with your engine code and model year.

• Exact SK20R11 thread size and reach as OEM specification
• Factory-grade electrode chemistry for consistent spark
• Sold in original DENSO packaging with included hardware

What practical benefits will I notice after installing these spark plugs?

Installing fresh DENSO SK20R11 plugs can lead to more consistent ignition from cylinder to cylinder, smoother starts, and steadier idle compared with worn plugs. Results vary by vehicle condition, but replacing old, fouled, or gap-worn plugs commonly improves drivability. These plugs are intended for standard replacement intervals rather than performance tuning.

• Smoother engine idle and reduced misfire risk
• Reliable starting across temperatures when properly gapped
• Consistent fit and torque thanks to OEM-style threads

How should I install and maintain Denso SK20R11 spark plugs?

Installation follows normal spark-plug service steps: confirm gap, hand-start threads to avoid cross-threading, torque to the vehicle maker's specification, and replace ignition boots as needed. Check gaps only if the vehicle manufacturer recommends it—many DENSO plugs come pre-gapped for specific applications. Inspect and replace at intervals recommended by your owner’s manual or during routine tune-ups.

• Hand-start threads, then torque to factory spec with a calibrated wrench
• Verify or set gap per vehicle manufacturer guidance
• Replace ignition boots/coil seals if aged or damaged

Who is this product for?

This DENSO SK20R11 (3297) pack of four is meant for drivers, independent mechanics, and fleet technicians seeking a genuine OEM-spec replacement for vehicles that list SK20R11 as the required plug. It suits anyone replacing worn or fouled plugs during routine maintenance, performing engine tune-ups, or restoring factory ignition characteristics. If you’re unsure whether SK20R11 fits your car, use the seller’s fitment confirmation tool or consult a service manual before ordering.