Fits MK4 Astra and Zafira A SRi/GSi models with engine codes Z16LET, Z20LET and Z22SE only. It also fits MK5 Astra and Zafira B engine types Z20LEL, R & H including VXR models. It also fits 1.7 (Z17DTx) & 1.9 CDTi 8v and 16v (Z19DTx) engines. A small increase in NVH, usually at idle, should be expected when stiffening the connecting mount between the engine/transmission and chassis. The harder the material used, the greater the NVH transmitted especially on diesel engines. Powerflex dealers and Vauxhall specialists, Courtenay Sport have produced their own comprehensive fitting guide for PFF80-1321.Click HERE for more information.