that is really the only one i've seen that can help combat persistant knock. Please share if there are any other products on the market like this. $250 is alot-o-money...
Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim