Our recommended coilovers for the BMW Z4 E85 and E86, including the Z4 M, from Eibach springs to AST and MOTON 3-way kits, with prices and which Z4 each one fits.

Our recommended coilovers for the BMW Z4 E85 and E86, including the Z4 M, from Eibach springs to AST and MOTON 3-way kits, with prices and which Z4 each one fits.

The AST 5200 in depth: separate rebound and compression on a remote reservoir, how it is built, AST’s starting settings, which cars it covers, and how it compares with 5300 and MOTON.

The Saab 900 has six listings across five part numbers, and the APC Turbo takes its own. Here is the full B-G and MOMO Saab range.

The MOTON 1-Way Clubracer in depth: 15 clicks of rebound, no reservoir, a coilover at every corner, how it compares with the AST 5100 Clubracing, and the options worth knowing.

Sixteen B-G Isuzu listings come down to four part numbers. Work out which of the four you need and the rest of the range stops mattering.