Upgrading from NGK BPR9ES from BPR6ES.

[Halon]

I'd say hell no to 9's. With those mods, i'd stick with 6's or 7's.

[blackrosenova400]

Try running non projected spark plugs, they help prevent pre-detonation as the ground electrode is shorter and is less likely to get hot and pre-ignite the fuel.

Id go with BR7ES's at .026 gap

[mdost03]

Originally Posted by blackrosenova400

Try running non projected spark plugs, they help prevent pre-detonation as the ground electrode is shorter and is less likely to get hot and pre-ignite the fuel.

Id go with BR7ES's at .026 gap

This.

When I had my DSM, I ran that plug and it worked great to help with a little knock I was receiving.