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BTR LS 1237 Spring KitSPRING SPECS:190lbs @ 1.800" 570lbs @ 1.100"Coil Bind 1.030"KIT INCLUDES:BTRXP1237-1 valve spring (16)SR532-16 retainer setSL128-16 locator set (stock guides) OR SL138-16 locator set (bronze guides)VS LS KIT valve sealsVLM8-8MM-32 valve locks