Upgrade ignition performance with this set of 4 NGK 6637 BPR6EIX Iridium IX spark plugs. Designed with a fine iridium center electrode and tapered ground electrode, these premium spark plugs support reliable starts, consistent combustion, and smooth engine operation. The durable construction helps resist wear while delivering dependable ignition for everyday driving.

Each plug features an M14 x 1.25 thread, 0.8 mm gap, and heat range 6. Ideal for drivers seeking NGK spark plugs, iridium spark plugs, or replacement engine ignition parts. Please verify the BPR6EIX part number and vehicle fitment before ordering, as compatibility can vary by year, model, and engine.