TR6 regular or TR6 Irridium (what is the difference)

[sho95]

Just like the title says
Are there any differences in the plugs? Are they both OK to run in the Cobra?

Thanks

 

[postban]

Regular TR6, is what I used/suggest, much cheaper and they run fine.

 

[sonicobra500]

Hey sho95 I just got some Brisk Premium plugs installed and put it on the dyno to check the hp and tq!!! On the first pass my clutch slipped a little so the numbers are not accurate they are obviously lower than what they should be, but I still gained 7rwhp from just plugs!!!!! The only bad thing is they cost about $100 for the set, but other than that they're great!!! Check this link, http://www.briskusa.com/dyno_testing.htm, and click on the video's to see for yourself what a good set of Brisk plugs can do!!! Hope this helps!!!