bosh platinum +4
 

do these spark plugs really add hp? or do they produce more spark? whats with theses?

RE: bosh platinum +4
 

not really a horsepower adder, it will help your car respond quicker and increase efficiency.

RE: bosh platinum +4
 

While we're on the plug topic, does anyone know what the Iridium plugs are like, and are they worth the extra cash?

RE: bosh platinum +4
 

i have never seen them. most people just go for the cheapies. like gas. 93 all the way!

RE: bosh platinum +4
 

+4 are a waste of money IMO...I myself have Iridium plugs (Not Bosh) and they're allright

RE: bosh platinum +4
 

if your spark plugs didnt burn all the fuel.. then it would clog your cat and kill your engine. you shouldnt need a better spark then stock until your running very high horsepower.

RE: bosh platinum +4
 

Why?

RE: bosh platinum +4
 

i'm running the platinum +4, and i love em. i could tell a difference the day i put them in. money well spent in my opinion

RE: bosh platinum +4
 

They're not worth the extra money over the +2s.

RE: bosh platinum +4
 

Im running denso iridiums, but my motor requires them.