Big Gun shocks are specifically valved for high horsepower rear shock applications. Recommended for applications 1,000-1,500 hp. Both small tire and big tire cars can better control the hit to the tire with this series of shocks. Fits rear stock location of many GM cars and trucks including 1970-'88 Monte Carlo, 1964-'67 Chevelle/Malibu, 1968-'83 Chevelle/Malibu, 1955-'57 Full Size, 1965-'86 Full Size, 1968-'72 Nova, 1982-'96 Blazer/S10 . 14" comp x 20.9" extended length. May be ran as a coil-over with #20135D kit and 14" tall spring sold separately.