NGK Part # |
Description |
Notes |
PLFR5A-11 |
Original Spark Plug, 5 Heat Range |
Ran these at 467rwhp, 9psi, 100 octane, several thousand miles, no problems. Stock Engine. |
|
Dealer Available 1 Heat Range Cooler |
I have never tried these. |
|
Popular 1 Heat Range Cooler |
Ran these after building the engine. Most people run these. |
LFR7AIX-11 |
Just like above, but 2 ranges cooler |
Wil run these on the new big build. |
R7437-8 |
Racing Plug, I think its a 8 Range, which is 3 cooler. |
I cant recall who gave me this part number. They are expensive. |
Stock gap seems to work up to around 14psi.
