Spidertrax 4" Pro Series Axle Housing

The all new 4" Pro Series Housing is our strongest Spider 9 housing yet, delivering a level of quality and performance that is untouched in the industry. Building on the platform of our original Spider 9 housing, the 4" Pro Series Housing comes complete with 4" OD x 1/4" wall heat treated tubes, coupled with a wider shell that's now internally gusseted. Off-the-shelf at 68" OAL, working with both standard and mid-engine setups, the 4" Pro Series Housing is as versatile as it is tough. Our 4" Pro Series Housing also comes standard with our massive 2-1/4" aluminum filler cap & steel bung assembly, great for general gear inspection and filling.This is the same rear housing that has powered Loren Healy's Red Dragon Ultra4 racer to record breaking 1st place finishes. If you're looking to take your racing to an all new level, this is the housing for you.Every 4" Pro Series Housing comes with third member mounting studs & nylock hex nuts, 2-1/4" fill bung & fill cap, Spider tag, a