Eibach 13" Rear Coil Spring 5" O.D. 175 lb. YA0639 Carburetor inlet thread size is FIV20002 41551 OR Carburetor inlet thread size is 3 4 Inch 16 Valve stem holes are placed behind the center to prevent air leaks during wheel to wheel racing Eibach products are created to meet the extreme requirements of racing from Le Mans to Daytona The experience Eibach gains at the highest levels of racing is directly converted into the development of the highest grade racing springs on the planet
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