275cc LS3 HEADS SPRING KITS:PAC 1209 DUAL SPRING KIT Our CID LS3 4

Our CID LS3 4

125 Bore heads include:

Our Small Bore CID LS7 CNC’d heads include:

Your choice of spring kit

65 Int 152 225 273 319 352 365 Exh 109 152 187 214 230 236

275cc LS3 HEADS SPRING KITS:PAC 1209 DUAL SPRING KIT Our CID LS3 4Our 275CC heads start as an aftermarket casting that we designed our own port for. These heads perform very well compared to other 260cc heads on the market. Our 260 LS3 ported heads include: Our in house CNC port Bronze valve guides PCD surfaced to your desired chamber size Proprietary competition valve job Your choice of spring kit Rev 2. 165 intake valves REV 1. 600 exhaust valves This is our most common setup, but if this doesnt meet your needs