i blew up my motor a week ago and im about to put in a new motor, ill be going from my 6# lower pulley to stock pulley while the motor breaks in (2,000 miles) i just wanted to know if what i had been running, the tr6's would be too cold a plug for stock boost. any input would be great. im leaving the intake and catback on and going back to factory tune on my preditor.

 

You'll be fine with the TR6's. If you're planning on running high boost (15+psi), you may need a colder plug and can try the NGK TR8IX.

As for not installing your 6# pulley, a little self control and it really doesn't matter what lower pulley you have.

 

For stock boost levels the stock motorcraft plug is about the best you can get.

But yeah, a tr6 will work too.

Rich

 

Those are fine for a stock truck keep the gap around .036-.038"

JimIII@JDM

 

thanks guys thats a big help