Been running the Platinum Bosch 4 with the non-adjustable gap for 6-7 months so far and I'm thinking about changing them for something else.

What do you guys recommend? Also, will I notice any difference in power? The Platinum bosch 4 were GREAT. Just need to change them for something different.

 

First go to www.import-pro.com and check their dyno runs on the Bosch vs the rest. You might just keep them!

 

Well I want to see dyno test of those plugs after they have been used for a while. I know a guy that is in the spark plug biz and he says that the +4's are the best, they are the only plugs that don't lose any horse gainsm unlike everything else, except Delco plugs. which means that the cheep *** delcos are as good as the -6 buck a piece +4's. But there is a plug coming out that is better then +4's.

 

Bosch F-6DP plugs. Part number 4227 are hard to beat for FI hondas, and are cheap as ****. Only fell 1whp short of the Denso Irridiums(sp?)...

 

4227 plugs are regular platinum plugs?
are they available at any parts store or on special order only?

 

My Napa store had them on the shelf.