Description
Crower Dual Valve Spring 0.980 in Coil Bind 1.400 in OD Set of 16 Rugged Radios & Accessories 235 lb in rear spring rates WEI7155 235 lb in rear spring rates This tells the ECU which cylinder is cylinder #1 (or the first cylinder in the firing order as entered in the software) Crower products are used in everything from NASCAR to NHRA Top Fuel Product Description: