No lie I paid for 5 E3 Spark Plugs for $3.99 each, now check this out I had one hell of a miss frie in cylinder 4 (secend from the firewall) so I check it out and try and move the plug to cylinder 1. Same now miss fire in #1, so I go and get one more E3 and in the end still one hell of a miss fire. After a little bit of talking with some guys they tell "hey the damn thing comes with Ac dealco so just go to a better plug" and now I'm rolling with Ac Delco Iridium Spark Plugs. To me I fell it just a tab bit better. I like the feel and in the end DON'T get E3 spark plug for the I5 3.7. I'm all about more HP for the T but sad truth is 135hp to the wheel is not good at all. Can anybody point me to the right place for more HP, heres my list of what I already done to my T.

Bully Dog Watchdog,
Ac Delco Iridium Spark Plugs,
K&N Intake System,
Poweraid Throttle Body Spacer,
Stage 2 JET Performance Chip,
Flowmaster Exhaust,

 

I have watched extensive testing with a number of gimmicky spark plugs for other cars... there are half a dozen that claim more HP either with funky designs or incorporating a capacitor (such as a pulse plug). Bottom line is you can't beat a set of iridium plugs from a reputable manufacturer, dyno proven every time.