Magnuson TVS1900 @8psi on a 2012 6.2L 10.5:1 comp. w/ Headers.
Should I be running different plugs? Magnuson said stock with 6psi.

 

I would be, try some NGK BR6EF. That's a non projected TR6.

 

so should i just run the standard type BR6EF or do they make a platinum or iridium plug

 

Run standard, avoid platinum tips etc. standard plug dissipates heat faster from tip to help avoid detonation.

 

+1, that's what I run

 

pull a plug on number 7. count how far down the threads the carbon line is. if it's more than three, put a colder plug in there.

 

ok thanks BR6EF it is when i put the headers on

 

I agree with these guys.

 

Ok so what's the difference between BR6EF & TR6.....? I recently picked up a Roush tvs1900 and it did not have the "colder heat range" spark plugs. I have asked around and have gotten several different answers ....So which is best for me? Truck is 2008 5.3 non flex fuel.

 

Please read the above post from this thread. For both parts of your question.