Acura & Honda One Step Colder NGK Spark Plug Set of 4 
(Race-Tuned-NA-Turbo)
(please note when using Ebay compatibility chart these plugs are not OEM heat range and is 1 step colder for better performance) 

Quantity 4- ZFR6F11 NGK

Center Electrode Core MaterialCopper Core
Center Electrode Tip MaterialNickel w/ V-groove
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel Core
Ground Electrode Quantity1
Ground Electrode Tip DesignStandard
Hex Size5/8 in
Insulator Height50.50 mm
Manufacturer Heat Range6
Part NumberZFR6F-11
Pre-Gap Size.044 in
Reach.75 in
Resistance5000 Ohms
Seat TypeFlat
Stock Number4291
Thread Diameter14.00 mm