Chrysler 300, 300C & 300C SRT-8 The flagship of the Chrysler lineup offers the driver every bit of class of any European luxury sedan, combined with the availability of the Hemi, the engine which dominated the American Muscle Car Era

Spark Plugs and K n N Air Filter Qs

  #1  
Old 04-21-2007, 08:19 AM
Thread Starter
Join Date: Apr 2007
Posts: 1
Default Spark Plugs and K n N Air Filter Qs

I've had my 300C one year now and love it. I have to change spark plugs and had a question. Are the Irridium plugs worth the price (about $8-10 each) and will they go 100K miles?

Also does anyone havea K n N filter installed? I was looking at the 57-1542 model which gives you a 21hp gain. If anyone is using this I would appreciate any feedback on them.

Thanks
-G
 
  #2  
Old 04-21-2007, 10:42 AM
CHRYSLER TECH's Avatar
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Join Date: Mar 2006
Location: Norcross GA
Posts: 8,108
Default RE: Spark Plugs and K n N Air Filter Qs

stick with champion plugs and no the sir filter will not give u a 21hp gain all chrysler are speed density systems and the amount of air flow into the engine has already been factored into the math. If u change the side of the throtle body intake and have a way to recalcuate the equasion then yeah u can gain HP. Or change the amount of fuel going in
 
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