SPOOL XR6 CONROD SPECS:

"SPOOL " CONNECTING RODS ARE TRIED AND PROVEN HIGH PERFORMANCE  FORGED STEEL CONNECTING RODS FOR TUFF STREET / STRIP ENGINE APPLICATIONS.

THEY ARE MADE FROM A 2 PIECE CHROMEMOLY STEEL FORGING TO ENSURE MAXIMUM STRENGTH AND DURABILITY AND COME STANDARD WITH ARP 2000 FASTNERS.

Forged Steel rods - begin life as bars of SAE certified 4340 Steel ( high carbon which is far superior to the low carbon 51 series steel used in most OEM forged rods ) that pass through a rolling forge die. This compacts the molecular structure and establishs a uniform, longitudinal grain flow. The bars are then heated to a plasticized state, inserted into a female die and pressed into the near final shape while a punch locates and knocks out the big end bore. In doing this the grain flow at the big end is redirected in a circular pattern, like wood fibres surrounding a knot , and excellent compressive / tensile strength results. Finally the rod is put through CNC machining and  finished to the final spec.  

YOU CAN NOT PREP A SET OF STD RODS FOR THIS PRICE BY THE TIME YOU HAVE ( RESIZED THE MAINS, REBUSHED THE SMALL END, SHOT PEENED AND LINISHED THEM, FITTED ARP ROD BOLTS AND BALANCED THEM - AND STILL THEY WONT HANDLE AS MUCH HP AS THESE )