Spark plug BRISK or OEM Subaru

I just did mine not too long ago, replaced with Brisk ER12S. Didn’t need a coil puller tool, just had to be careful getting them out. Warming up the engine is helpful too. Otherwise an easy job.

Ive been using the Brisk USA Premium Racing Spark Plug 14mm... yeah I get it they are kinda expensive when it comes to spark plugs at little over 13 dollars a piece but trust me they are worth it, ive never had good luck with any of the spark plugs listed for the 2.5l, specially not with what I've done to it, iridium plugs, platinum, copper, Nicole, even ruthenium plugs.... but these Brisk plugs are killers, ive never had my car run this well before, even my throttle response is better and the heat range is correct as well..

I got mine from ECS: drop-in replacement and no issues even with my Burger unit on map 2.

I currently run the Brisk er12s and have been happy with them...I'm mpi running full e85 and the car responds well. It's also what my tuner recommended.

I got a set of APR coils and Brisk Silver Racing ER12s plugs for around 200

My 2002 had a similar issue. In my case it was the spark plugs, $250 fix.

I run 0.024 but I’m running Brisk plugs in my car on a custom tune. They’re pre-gapped to 0.026 and anywhere between those two would work fine for my specific plugs.

I'm getting some knocks in all cylinders in the first revision, more than I did with the Cobb OTS map and stock spark plugs. Hopefully it gets sorted out in the next couple of revisions and if not, I'll have to check the spark plug gaps or maybe re-run with the Cobb OTS and see if the knocks are due to the tune or spark plugs.

Overall, the power delivery is great.