Thread: Denso ITF20 Spark Plugs

Just curious is anyone has ran these plugs. I have a 2000 Formula that is a heads & Cam car & I run NGK's in that. My GF has a 2006 4.0 V6 & did the Denso Plugs on her car & I swear it feels alot faster just with changing the plugs.

Reason I ask if anyone else has run these is cause Manny my buddy who has a 500 RWHP Stang with a Supercharger was have a ignintion issues. Well they tried the Denso Irridum ITF20 plugs which are a range colder & this cleared up his issue & he gained 30 RWHP on the Dyno.

So I wonder what these would do on my 2000 GTP since they are a range colder & seem to work good with Forced Induction motors

so the plugs were worn and you put new ones in and gained power? awesome

and 30 HP loss from plugs means he must have been missing TERRIBLY.