what spark plug should i go with in a 2002 5.3 with these mods? i was looking at e3's and the Bosch Platinum+4's but i figured i'd ask first


also what should i gap them at?


218/224 .550/.550 114lsa cam
tsp pushrods
ls6 springs
ARP rod bolts
ls1 intake
bumpstop mod on the TB
28.8# injectors
1 3/4" LT's

 

Most people on this site run NGK tr55 on n/a motors .That's what I use in my t/a.

 

gapped to what?

 

gapped to .050" works pretty good.

$2 ngk tr5s are hard to beat

 

Both of those plugs are gapped during manufacturing and are not supposed to be gapped by the end user. They're also overpriced junk.