ZS1 Bypass Filter Kit. Designed and manufactured as a direct replacement to the old ZS1 throw away canister filters as used on many vintage and classic vehicles of the 1940's - 1960's. Like Land Rover, Ford V8, Bedford to name just a few... This kit looks as per the original ZS1 design so will help your classic vehicle maintain its classic look, but has the added bonus that when it comes to doing a engine oil change you can simply unscrew the housings and replace the low cost filter element and seals (available from us as a service kit) Why risk a newly rebuilt engine by fitting a very expensive NOS ZS1 filter which is already 60+ years old and then throw it all away when the first service comes around. £200 inc postage to UK (Overseas customers please contact me for a price).