I just pulled out the Original Factory AC 4 green ring R43T's yesterday in my trailer queen,and installed NGK UR5's,per Robs advise.
HOLY CRAP!
It feels like I added 10 more Horse Power with a much better start up & a responsive throttle as never before.
You should see how Fouled my old R43T's look.
Thanks Rob & Marlin
Lifes too short to stare at your Car..
