High quality aluminium castingSuitable for use with IDA Webber carburetor or IDA Throttle Body Injection setupsBrake booster, vacuum & oil metering fittings not included (Can be installed for an added cost - see product options)Gaskets & hardware includedManifolds to suit 13BT (series 4 & 5 block) also available - See product optionsApplications:- Mazda 13B 4-port- Mazda 13BT