I have a 2004 ES 2.4 Litre and am in need of changing the plugs. I priced them from Mistu dealer and they quoted me $15 per plug. what are your thoughts on Bosch or NGk plugs? will they affect idle and cumbustion differently than those from the dealer?

 

Not tryin to be rude, but using Bosh plugs is stupid! NGK Iridium's all the way. It's almost an OEM replacement. They're $7.99 give or take a buck depending on where you get em. BTW don't use any thing other than Iridium plugs.