PREDATOR-Z

Please,
Thanks

sonic snake

iTrader: (11)

I believe the part # is 4091 (R5671A-7).

sprydncamd ta

iTrader: (4)

its not actually called a tr7 which is why you wont find it if you look at the top of the nitrous page there is a sticky on the spark plug heat ranges and part numbers its a br7-something

TwoFast4Lv

iTrader: (8)

if you really need to go that cold I would HIGHLY recomend looking at the Autolites

sprydncamd ta

iTrader: (4)

i run the 7 series ngk with no problems why do you recomend the autolites

TwoFast4Lv

iTrader: (8)

Because the plug will sacrafice it self to save the engine the strap and electrode will start to melt and not just blow off like a street plug.

Yes I am Biased. I recently had a set of autolite plugs save my engine I can not tell you how many times I have seen NGK street plugs with blown off strap's