Identify Bills Pipes (which type is it ?)

[JohnBeton]

Hello,

A couple of weeks I picked up 2 complete engines in parts and there was this bills pipes exhaust included in the package.
Does anyone know which type this is, is it a big bore, or for standard bore ?

Thanks

http://img137.imageshack.us/img137/2231/1000927oj1.jpg

http://img150.imageshack.us/img150/3516/1000928se3.jpg

[bushwesl]

I don't know Bill's pipes that well, but from what I can see it does not appear to be a big bore pipe. From what I've seen, any pipe that is labeled a "big bore" pipe will have a larger diameter stinger than a regular pipe, and will require a silencer which will accept the larger diameter stinger. I don't even know if Bill's ever made a big bore pipe.