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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6
For early LS engines with the long and short bolts
ARP Main Studs and Main Tunnel Resized
Superior Tensile Strength: Significantly stronger than factory GM sleeves
the marina
Final Wash and Assembly
Boostline CNC Ported 821/823 Cylinder Heads - Pair LT Shortblock For early LS engines withTop 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
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