These allow adjustment of front caster and provides more steering response and feedback. 
SPL’s new version are now larger and stronger whilst featuring tough chromoly rod ends, Seals-It rod end seals (longer lasting than dust boots and replaceable without removing the rod end, which would require a realignment). 
Construction:
Anodized 32mm billet T-6061 Aluminium main rod, spacers
Chrome plated steel buckle, jam nuts
3/4" (~19mm) 2-piece Teflon-lined chromoly rod end 21,400lb static load rating. Seals-It rod end seals

These allow adjustment of the front roll centre by changing the length of the shank attaching to spindle.  Adjusting the roll centre can reduce roll moment on lowered cars.  This arm should be setup by a race alignment shop. 
Construction: Chrome plated sheet steel
18mm Teflon lined spherical bearing ~10,700lb static load rating.

Using Energy suspensions new bushings with new long bolt included for ease of fitting, simple effective upgrade of the stock items.

They feature elliptical cross-section tubing for increased strength and light-weight.  Allows for adjustment for rear camber 
Construction:  Chrome plated oval cross-section chromolly tubing 16mm 2-piece Teflon lined rod end ~8,400lb static load rating.

The traction rods holds the rear wheels in position relative to the chassis during acceleration and deceleration.  Solid bearings and tubular construction reduces play/movement in this critical link.  For best performance should be used with solid bearing spindle bushing and reinforced subframe. 

Note:  Adjustment of the rear traction rods together with the rear tie rods (twin-turbo models) or rear toe arm (non-turbo models) can also alter the geometry between the two arms to reduce rear bump-steer.  This should be set up by a race alignment shop. 

Note:  Hicas must be disabled. 

Construction: Chrome plated chromolly tubing, 16mm 2-piece Teflon lined rod end ~8,400lb static load rating.

This eliminates the rear wheel steering feature on the twin-turbo models.  The rear wheel steering provides increased stability in a high speed slalom, but also creates a floating feeling on a long corner and can also interfere with counter-steering when driving at the limit of traction. 

Unlike other cheaper Hicas eliminators, this eliminator replaces the inner tie rods too.  Stock inner tie rods that came with the car are almost always bad, and can contribute to wheel hop.  New Nissan inner tie rods are costly, and in the long run the 12mm rod ends used in this eliminator is much cheaper to replace than Nissan inner tie rods.  

Construction: Powedercoated steel, Sealed 3-piece 12mm rod end ~5,800lb static load rating.

Hicas Eliminator	£565	SUS012

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AGX Adjustable shocks and struts are manually adjustable. The fronts are 4 way adjustable from within the engine compartment and the rear are 8 way adjustable. These shocks and struts are a great replacement for sagging stock shocks at a good price too!