Thread: what plugs and gap should be used?

2002 gtp. 3.4 pulley, stage 1 intense cam, cold air intake, 105 springs, headers, 3" down pipe, 2.5 borla catback, cat delete, u-bend del, custom pcm tune. ((soon to be a 3.2 pulley.))

currently im running autolite 104's but im getting alot of mixed signals from alot of people. HELPPPPPPP!!!!!!!!!!!!!!

I say you're good right now with the 104's, but you should definitely use 103's when you drop to a 3.2 pulley. I have my 104's at .053" with my 3.4 pulley.

I would keep the 104's gapped @ .060" if you can...if you have no knock with them then your good to go...most people don't put in 103's until your under the 3.1"/3.0" mark as they are very cold plugs and only last MAYBE 10K miles tops.

Originally Posted by bluegtp91

I would keep the 104's gapped @ .060" if you can...if you have no knock with them then your good to go...most people don't put in 103's until your under the 3.1"/3.0" mark as they are very cold plugs and only last MAYBE 10K miles tops.

im putting on a 3.1 this weekend. ive got a stage one intense cam, headers, no cat, 2.5 all the way back, 160 stat, ect. will i need anything more for a 3.1?? and if i need 103's what gap do i need?

I would run the 104's in your car should give you the right heat range.