Allstar Performance Spring Pre-Loader - 3" - 14" Tall Spring H77603FM GM F-Body 1967-69 / GM

GM F-Body 1967-69 / GM X-Body 1968-74

1979-1986 GMC K2500 Suburban

A3000 Pre-Filter OnlyAeromotive Inc

Wide Engagement Cone For Easy Snap In

for extreme lightness along with HANS proven technology to create the lightest

Allstar Performance Spring Pre-Loader - 3" - 14" Tall Spring H77603FM GM F-Body 1967-69 / GMPre loader allows use of a softer spring rate that is pre loaded at ride height. The pre loaded spring will have less rate increase as the suspension travels. For example, a 150 lb. in. spring can be preloaded to 400 lbs. at ride height, but still only increases at a rate of 150 lb. in. as suspension travels. The entire unit may also be exchanged with another unit with a different rate spring pre installed to allow spring rate changes without