Dual ground electrode spark plugs

[mimelio]

Originally Posted by TheSilkySmooth

Usually any car will respond to new plugs unless the heat range is way off or the electrode gap is off. One month down the road will tell a bigger tale. The ford dual-ended coil resonant ignition will spark the bosch plug - the toyota tiny coils will be toast. They NEED an easy to spark plug and the Ir fit the bill. Ir with small electrodes is biggest advance in plug design in 100 years. I racing we MADE our own plugs. Big secret - can't say anymore or Dick Childress will kill me ...

Performance isn't as good with the new Iridium plugs...I have a couple friends one ran his Echo 150,000 miles on +4's and the other over 200,000 on his Tercel with no issues.