there are many variations depending on preference. .040 (stock) is fine
Yes, there are 4.
yes
40
.040
NGK BKR5ESA-11 #
It's .040
Just did mine today, they should be gapped at .040".
possible misfires caused by spark plug/coil wires
Spark plugs, spark plug wires, throttle body cleaning / decarbonization and fuel filter would be a complete tune up on your car.
Defective spark plug or plug wire, burnt valve, blown head gasket, fuel injector problem, or broken piston ring.
2001 sl2. 119 exchanged NAPA auto parts
You clean or replace it.