This engine is based off of the cat 800 or 900 triple bottom end. CPC heads,billet block stiffener,light weight balance shaft. V-force reeds. Comes with 44mm round slides all electronics including the avenger III race pack. Pipes. Basically everything I have for this engine goes with it. Want this out of my shop. $1500 obo. Call or text me at 406-855-0392 or email me at thadeez10@gmail.com