Boostline CNC Ported 821/823 Cylinder Heads - Pair LT Shortblock ARP Main Studs and Main

ARP Main Studs and Main Tunnel Resized

• Hardboard MDF 0

Need a stronger fastener

Superior Tensile Strength: Significantly stronger than factory GM sleeves

the marina

Boostline CNC Ported 821/823 Cylinder Heads - Pair LT Shortblock ARP Main Studs and MainTop off your short block, or just upgrade your current setup with Boostline's CNC ported squareport LS3 heads! These are a factory GM head that have been CNC Ported. These heads start off as a factory casting from GM then enter Boostline's advanced manufacturing processes proven to generate the most efficient power in every application. We take great pride in our work and our attention to detail is unmatched in this industry. FEDs Boostline Heads