Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS 65 Int 148 210 270

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

Cleaning and reassembly to your needs and specifications

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

Cleaning and reassembly to your needs and specification

TSP 660 Spring Kit

Large Bore CID LS3 (4.125") SPRING KIT:TSP .660" SPRINGS 65 Int 148 210 270Our 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***