Modular 4.6 and 5.4 Modular 2 valve ported cylinder heads gm ls These short blocks are rated

These short blocks are rated up to 1200hp safely

Crankshaft balanced within ¼ oz-in tolerance

3mm Oil Bearings: Clevite or ACL H Series Main & Rods Main Studs: ARP

6 engines are the proper foundation to add  horsepower with reliability  to your high performance vehicle

300" material above top ring land) With Gas Port For Improved Ring Seal Wrist Pins: Upgraded Tool Steel

Modular 4.6 and 5.4 Modular 2 valve ported cylinder heads gm ls These short blocks are ratedMesa Balancing Racing Engines has been involved in airflow development for over 20 years and we clean inspect hand port and machine the majority of the cylinder heads used in many of our race and championship winning engines for our customers and many private label internet sales companies . All of our cylinder heads can be supplied assembled which we strongly recommend from an assembly fitment standpoint or bare at customers request. We can also port