Shock absorbers are not all equal. The Spax brand is often considered to be the top of the range. Spax dampers are Krypton gas pressurised for a much longer life and unlike standard oil filled shocks they are consistent in light to heavy use. The screwdriver adjust feature, not only allows you to tailor them to your specific likes, but the ease of adjustment encourages you to change them as often as needed.

Spax are available in standard length and from pin centres measure
for front with closed length 228.50mm, open length 327.50mm
for rear with closed length 261.25mm, open length 385.25mm

Spax shorter length for lowered cars and from pin centres measure
for front with closed length 218.50mm, open length 312.50mm
for rear with closed length 251.25mm, open length 365.25mm

All are sold individually but it is highly recommended that they are fitted in axle pairs.