I run the stock spec x11 13.5 and all i can say is WOW.
Lrp's new design is very good. this motor runs soooo cool it is not even funny.
I was able to go up 2 teeth on my pinion from my novak pro ss and it does not break 143 deg. after a 12 min. run. for a 6 min main i will be able to gear it to the moon

I was on the ledge over the novak and the lrp so i bought both ,tried em both in my b4 and went with the lrp.I put the novak in my touring car
I run a sphere comp. profile 2
I will buy a 17.5 v x-11 for stock touring this summer.