KYBs Excel-G series is a nitrogen gas-charged twin-tube design shock that is specially designed to deliver a smooth comfortable ride. A patented check valve minimizes foaming and aeration to make sure the ride stays smooth even under rough conditions.Features:Calibrated to compensate for worn suspensionsComponents and valving are designed specifically for each applicationDesigned to help restore OE performance for normal driving conditionsBuilt with quality that matches or exceeds OESpecifications:21.34 extended length12.80 compressed length8.54 stroke lengthApplications:1980-84 Pickup/Blazer/Jimmy/Tahoe/Yukon/Suburban 4WD with dual front shocks (inside shock)