BCPR7EIX NGK Spark Plug for RB26DETT
REQUIRES 6 per RB26DETT.
The stock Nissan Skyline GT-R is a heat range 6 platnium plug.
* P = Premium platinum
* F = 14, 19mm(3/4") reach, 16mm (5/8") hex
* R = Resistor
* 6 = Heat range 6
* A = Firing end construction
* -11 = 1.1mm gap (0.044")
Heat range for NGK plugs 2 HOT - 11 Cold
A good stock replacement spark plug for an RB26 is a BCPR7EIX. Its an NGK Iridium plug. Heat range is 7 which is one heat range cooler than stock. Its readily available in the US. I would use them up to about 500 horsepower on an RB26. Above that I would look at an 8 for a street car, cooler if its a track car. I have had good luck with NGK plugs, I insist on them in the race cars I work on. One less thing I ever have to worry about.
JIS length - 53 mm from seat to plug tip. STD GT-R plugs are JIS length.
ISO length - 50.5 mm from seat to plug tip
|IRI Series||=||Alphanumeric Part#|
|(Not available in the US. Can use BKR8EIX, which is identical but is ISO length instead of JIS)|
|(Not available in the US. Can use BKR9EIX, which is identical but is ISO length instead of JIS)|