Allstar Performance Spring Pre-Loader Wrench - Fits Body NG21 1971-1973 Dodge B200 Van

1971-1973 Dodge B200 Van

Ducts may be mounted to virtually any flat surface and accept a 3" diameter hose

1979-1993 GMC C1500

3/5 specification

Allstar Performance Spring Pre-Loader Wrench - Fits Body NG21 1971-1973 Dodge B200 VanPre 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