We designed this 5" stroke shock with valving specifically tuned for mono-shock swing arm dragsters. Recommended for 1,000-1,500 hp applications. (For higher hp, see part number 3250-1.) 5" stroke is 12" compressed and 16.92" extended to fit a 13.75-14.75" ride height. Includes coil-over hardware. Suggested 10" or 12" tall spring sold separately.