HKS 44999-AK001 A/F Knock Amp Accessories
O2 Sensor Boss & Bolt Set
Just bought your HKS A/F Knock Amp and
want to get it up and running ASAP Well
you may need some of these accessories. An O2 sensor will help (might as well keep a backup) and
you ay need a Senson Boss to install it in your downpipe. A Harness
might be necessary and might as well grab a Connector Set while
you?re at it.