One of the popular upgrades to the XP 1000 and XP4 1000 is a pair of 2.5″ front shocks. The factory shocks are 2″ in diameter and are great for 90% of the people out there. But, if you run your RZR hard or maybe you plan on racing your car you may see some shock fade (over heating) which will feel like the front suspension gets softer. It takes a lot to do this and most people will not run into this problem but if you run for hours at a time or race over 100 miles through the roughest terrain then a 2.5″ front shock upgrade may be for you. With the larger shock diameter you get more oil volume which takes much longer to over heat or “fade”. In addition, with the larger 2.5″ diameter piston you can tune more bump stage resistance into your system without sacrificing any plush ride through normal terrain. This means you can run harder without having any bottom out issues.
If racing is part of your plans then you need to consider STEEL shock bodies as well. WHY? The standard shock bodies that come on the 2.5″ Walker Evans shocks are aluminum. These are great for most people under typical use. These are relatively easy to machine and don’t require plating. There are two negatives to this. One: the preload collar is also aluminum and tends to seize up on the shock body after you adjust your ride height a few times. If your like most racers and change your ride height a lot then this is a big issue. Steel shock bodies cure this completely so there is never a seized preload collar due to the dis-similar materials where the collar contacts the body. Two: the steel shock bodies have less shock FADE than the aluminum bodies. The reason is this, even though the aluminum body has better heat dissipation characteristics than the steel body does, dissipation is not the real culprit here, it is expansion. Aluminum expands 5 times faster than steel. When the aluminum body expands it looses hydraulic seal with the piston inside. This basically means you have no resistance from the shock in a big hit since the fluid passes around the piston instead of through it and it’s valving. Since the steel body doesn’t expand near as much it retains the piston seal even at high temperatures limiting potential fade. Every race shock used on a Trophy Truck, Class one (unlimited) in SCORE or BITD desert racing uses a steel body. This is true for Bypass shocks, coil over shocks, Fox, King or any other competitive race shock company. We are the only company building upgraded steel bodies for Walker Evens shocks. We are serious about suspension performance. If you take your racing serious too then upgrade to our steel bodies and see the performance difference.
(desert racing, sand dunes, trail and short course spring packages are available)
STEEL bodies add…….$200 a pair
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All prices are in USD