This spark plug wire set is designed to fit BMW models with 4-cylinder engines in the E36 model range, including the Z3 roadster. It is manufactured by Karlyn/STI and carries the OE/OEM part number "491 w/Loom". The wire set is made in Germany and meets all necessary standards for ignition wire sets. This high quality ignition wire set is perfect for maintaining and improving the performance of your BMW. The set includes all necessary wires for a complete replacement, ensuring that your engine is firing on all cylinders. Trust in the reliability and durability of this Karlyn/STI wire set for your BMW.