Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS ****WE STRONGLY SUGGEST PUTTING INTAKE

****WE STRONGLY SUGGEST PUTTING INTAKE SEAT UPGRADE IN LS3 THEY ARE COMMON TO FALL OUT***

Brodix BR7 castings with our in house CNC port

Our 260CC heads start as an aftermarket casting that we designed our own port for

7 Int 156 237 300 338 375 391 402 Exh 108 162 205 232 246 250 253

All CNC services include:

Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS ****WE STRONGLY SUGGEST PUTTING INTAKEOur CID LS3 4. 125 Bore heads include: Our in house CNC port PCD surfaced Proprietary competition valve job Hand blended valve job TSP 660 Spring Kit REV 2. 2 Intake Valve REV 1. 6 Exhaust Valve ***This is our most common setup, but if this doesnt meet your needs please call us so we can get you set up to your needs***