I've heard good things about the NGK TR55's and am currently running them now but I need to change them out. Here are my current mods:

'95 T/A M6 (used to be an A4)
Stock thermostat
Stock injectors
No Air pump system
Moroso cold air induction kit
AS&M 52 mm throttle body
No CAT (straight pipe)
TPIS 1 3/4 shortie headers
LT4 knock module
Ported/polished MAF (removed screen)
Flowmaster Muffler
LT4 HotCam
Ported LT1 heads
2.00/1.56 Manley race flow valves
Crower Springs, Chromemoly locks and retainers Good to .580 lift
Comp Cams screw in studs and guide plates
1.6 GM Rocker Rollers
Flow as follows:

.100 71/62
.200 133/112
.300 187/157
.400 219/185
.500 248/192
.550 258.5/193.5


Should I stick with the NGK TR55's gapped at .50 or look at another plug or gap setting?

Thanks in advance!

 

As long as your not spraying the TR 55 will work fine.

That's what I use.

 

Thanks for the reply!

 

I use TR-55s too and will be sticking with them for my heads cam swap as well.

 

Tr55s gapped to .50