The Zenith is alot faster than the Viair.. We have found that if you put a Viair Leader hose on it will be even better. the Hose thats on it is small as hell. They have not been out long enough to say if will last as long as a viair but i guess we will see. If you are going spend the cash on 4 compressors then if i was you i would just get a EDC. It fills fast as hell and no drain on the bat. Hit us up if you have anymore questions we would be happy to help ya. Check out our site
www.fmkustoms.com