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Wow just reading this Colin, I got iridium in mine payed about bloody nearly 40 quid for mine and your telling me the ngk ones at 12 quid will just do a good of a job aswell? Anything under 1bar? Just for future reference?

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BKR7e will handle quite a bit of boost - I run them in most of the engine setups I build and have seen 20+psi with them without any issues as long as the tune is good. Have run 8's on higher boost setups. As mentioned above, just check them every now and then. Its good practice to read the plugs anyway


Edited by Stu
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Wow just reading this Colin, I got iridium in mine payed about bloody nearly 40 quid for mine and your telling me the ngk ones at 12 quid will just do a good of a job aswell? Anything under 1bar? Just for future reference?

the copper plugs handle high boost...way more than 1 bar

i have seen ngk bkr7e and bkr8e used in excess 1 bar and up to 20/22psi without any problems in 4e/5e engines

save some money...just get copper next time

in a different car, i've seen them handle 2+ bar with meth and race gas

Edited by gorganl2000
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