opel

What plugs are people running in the vortec heads?

Dave

bogus

can't go wrong with NGK.

opel

I was hoping to get part numbers. But thanks anyway.
Dave

opel

ttt

cplonner

I have accel header plugs in mine. With those heads and the hooker headers there is a pretty tight fit for the plugs and the boots.

Slalom4me

opel - here are some possible choices. Do your own research to
confirm suitability.

Physical dimensions: 14 mm thread, ¾-inch reach, 5/8" socket
tapered seat, projected nose

NGK - The larger the number. the colder the plug is
TR5 (Stock)
TR55 (Colder)
TR6 (Coldest)

AC/Delco - Indentification
R42LTS
R43LTS
R44LTS

ACCEL (.708" reach) 524 and 526 also available with short insulators
514 (Cold)
516
524 & 524S
526 & 526S (Hot) Stock equivalent for '96-98

Autolite - Tech Info
AR103 (Racing)
AR104 (Racing)
605, AP605 (Plat), APP605 (Double Plat), XP605 (Xtreme Perf)

Bosch (only 0.69" reach - 17.5mm)
HR9DC
HR8DPX
4305
4458
4205

.

opel

Thanks Slalom4me, good info this is a higher compression engine so I was thinking of the Delco R42LTS. I was running the R45LTS with the other vortec heads on a lower compression engine. I'm hoping to finnish it this week end.
Dave