Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS Cleaning and reassembly to your

Cleaning and reassembly to your needs and specification

65 Int 148 210 270 310 335 345 Exh 116 162 200 232 238 241

Our 706 & 862 ported heads include:

65 Int 136 194 243 278 300 311 Exh 102 136 162 187 193 201

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

Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS Cleaning and reassembly to yourOur 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***