Do the Denso Iridium's make a big difference cuz i ordered them and i'm going ot pick them up and if i wasted my money then i can return them, i just wanna know if they make a differece

 

Do not expect big power gains... maybe smoother idling and bit better gas milage.

 

actually you can feel the difference and i was only able to put the first 3 in. I wasn't expecting it but with the CAI and exhaust, it makes it a lil louder and more throttle response

 

(placebo effect)

 

you just gained 10 HP a piece, you do the math.

 

With the Denso Iridium plugs, you should be getting about 2-3hp in the lower end. Since you lose some of the lower end using a cai and/or exhaust, it somewhat balances things out.

 

Anybody know how the Denso's compare with the NGK's for about half the price??

 

I have both... I have the Densos installed just for the hell of it! No difference what-so-ever. Do not buy the plugs and expect gains unless you have a CAI. w/o CAI you are just looking at better gas mileage.

 

If you replace the platinum plugs with ANY non platinum 100k mile plug you will almost certaintly gain some additional power that would be visible on a dyno chart.

Just look at the tip of your NGK platinum plug and then look at the tip of any NGK/Denso copper or iridium plug.

There is a trade off b/w performance and long life, and the NGK platinums give up peformance so you don't have to change them until the 100k mile service.

If anyone wants to prove me wrong by buying a new set of NGK plats (which happen to cost MORE than Denso Iridiums) and any other copper or iridium plug, I'll pay for the dyno if there is no measurable performance difference b/w the platinum and the copper or iridium plugs assuming all plugs are the correct heat range and gapped to specs.

 

Wow... you guys have really confused me..

Which plugs would be best to try and provide a gain, all be it very minimal.

thanks!

 

Best bang for the buck would be NGK Copper or the more expensive NGK Iridium or the even more expensive Denso Iridium.

 

does anyone know the avg. lifespan of the Densos?