NGK ZFR6F-11 / ZFR6F11 / 4291 Standard Spark Plug Replaces FR7LCX OE089 RC9MCC4 KJ20CR-L11 K20TT (4291 ) This is the workhorse, the plug that is at the heart of smooth-running engines around the world. OEM quality Triple-gasket sealing process Consistent performance Plug of choice in millions of vehicles BOX DIMENSIONSHeight (mm): 85 Width (mm): 24 Length (mm): 22 If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.