I was messing around in the shop and I took off my Pro-Circuit pipe and modded my end-cap on my Baja Stock pipe and I honestly think the modded-End cap is the way to go. Im gonna compare to a Raptor I was equal to with the Pro Circuit, and see how it does.

 

i was thinking of modifying my endcap too since i can't afford the fmf pipe i want, but i'm just worried bout their not being enough back pressure

 

and i can't even get my endcap off, the bolts are like locked on there,

 

get the bolts hot with a small torch or let it run for a while and it will loosen the thread locker, and get vise-grips and clamp to the head and twist off. My DS has all around power, but thats what i want.

 

has anyone had their endcap modified for a long time? i just don't want to hurt my engine by not havin enough back pressure