The plug they sent me (Bosch #4417 FGR7DQP Platinum +4) runs absolutely fine on my engine, actually it feels better then before, but I just worried if it is indeed not the correct plug, will it do harm to my engine?
The Bosch side fires are an AAN plug that has a removable top. I will probably use those, they worked great with my B5 S4.
I've been using bosch FD5POR aka rs2 plugs. I'm quite pleased with them.
Bosch F5DP0R on a T3/T4 50 trim at 25psi daily. Love it.
I've been running BOSH+ and it feels great!!
I've used Bosch plugs for many years all types and never ever had one single issue.
Bosch FR8DC+ perform well and you won't have to worry about seized plugs. You might have to change them sooner.
Bought Bosch platinum's and red bremi wires. swap everything all out, the misfires alot worse.
Personally I've never had any luck with ngk's in any of my vr's always just run Bosch plugs and wires....
a spark plug job on an STI can be a 6+ hour job :thumbdown:
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