We are almost finished installing a 100 shot of nitrous on my brothers 99 Sierra. We have the NGK TR6s sparks plugs ready to install but we don't know what to gap them at. What do you guys recommend? Here are the truck's mods:

UPD intake
Borla true duals w/o cats
Thorley LT headers
HPtunning
ASP UD pulley
Ls1 fans
4.10 gears
Fully built 4l60e w/ 3400 PI stall
and TNT 100 shot

Thanks in advance

 

if i remember correctly, .035"

 

hell i run my plugs at .40 stock gap for 03 and up trucks

 

.035 sounds good. .040 sounds good too. It shouldn't make much of a difference with just a 100 shot.

I think they come close to 35 anyways. I'd just double check them and get them to 35 if it were me.

 

Okay... thanks for the help guys. .35 it is.

 

No ... not .35 .035! BIIIIG difference.

 

Whoops. That is a big difference. Thanks for clearing that up flyer.