Super Pro makes WhiteLines bushings for them.

The L and E Fabrication Open Class 413 uses Super Pro bushings on all the important suspension points. Erik trusts them when he is pushing the car hard down a stage and knows they are going to handle all the abuse he can throw at them.

WHY SUPERPRO?
Super Pro is a polyurethane elastomer based material and is a class of "Thermosetting" synthetic polymer that involves the reaction of various types of isocyanate resin with curing agents to give an extremely durable material with the best features of rubber and plastic.

MATERIAL
The Polyurethane that is specifically blended for the SuperPro product has mechanical properties that make it extremely successful in its application. The properties of extreme resistance to abrasion, low compression set, high tear strength and a resistance to oils and solvents make it ideal for automotive applications. These properties lead to a resilient product that is highly versatile in all of its applications.

STEELWORK
The crush tubing is an integral component of the suspension bushing system and is necessary for free pivoting. The crush tubes are made to precision tolerances to ensure that the precise fits are maintained. All SuperPro tubes are made of STEEL, with ZINC plating for corrosion protection and appearance. In some applications, SuperPro incorporates end knurls and hardened tubes to provide positive location. As required, SuperPro provides precision machined steel SHELLS to allow the installer to quickly and easily replace worn components.

THE DOUBLE HELIX
The double helix is used on the inside of the bushing. This design is primarily used on shackle bushings providing a region for grease to travel along. This allows the boundary layer of grease to form between the inside diameter of the bushing and the outside diameter of the tube. The double helix is extremely successful in grease able shackles as the grease can travel from the center of the bushing, along the helix and out to the grease grooves in the head of the bushing.

KNURLING
This is used on inside diameters of bushings to enable unrestricted pivoting of the polyurethane bushing around the crush tube. The knurling has two inherent design advantages. Firstly, the knurling reduces the surface area of polyurethane in contact with the crush tube, and this reduction in surface area results in less frictional forces being developed. Secondly, the SuperPro knurl bore keeps the lubricating grease intact for the life of the bushing, and eliminates the necessity for periodic re-greasing.

BULLET GROOVES
Rubber is not a precision component and will compress or distort readily to allow fitment, which in turn creates binding of the bushings. This is one of the main reasons why SuperPro polyurethane bushings are superior to rubber bushings, as they have a free pivoting point instead of a torsion pivot point like rubber. SuperPro had to develop a method of achieving the correct pre-loads while still accommodating a range of variances in different sizes. Bullet grooves allow the bushings to flex and accept a much wider range of sizes while still maintaining the free pivoting characteristics of the bushings.

SUPER PRO WARRANTY STATEMENT
All SuperPro Suspension components, which are supplied for the specific applications listed in the catalogue and are fitted according to SuperPro fitting guidelines, are covered by a 3-year or 60,000km limited warranty from the date of the purchase and from the ORIGINAL owner.

The warranty is limited to replacement of the faulty component only, and does not cover the cost of removal and replacement and consequential damage, where this limitation is permitted under Australian State and Federal Legislation. All warranty returns must be submitted by an authorised SuperPro distributor and must be correctly tagged for identification purposes.