New set of 16 Erson Performance # 3000 Z-28 style valve springs with 110 lbs. seat pressure @ 1.70 installed height, 90 lbs. seat pressure at 1.750 installed height, 300 lbs. open pressure @ 1.250. Stock 1.25 diameter. Maximum lift is .550 if set up at 1.75 installed height.
Buy with confidence - we have been in the racing parts business full time since 1978.
PERFORMANCE AUTO - WATERLOO IA.