Made to mount on top of hard boost pipe. Vacuum port on top.
Made to mount on top of hard boost pipe. Vacuum port on top.
Replace your lost blanking cap on your Forge Splitter valve (FMDVSPLTR)
Limited Edition - Individually Numbered
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
07-02-2026
Converts factory diverter valve into a blow-off valve
Creates a aggressive BOV sound. Only fits HKS BOV
Creates a "Whoosh" noise instead of a whistle. Simple install on all HKS BOV's
Replace your lost blanking cap on your Forge Splitter valve (FMDVSPLTR and FMBSPLTR)
Add a touch of audial excitement without compromising your daily comfort
Limited Edition - Individually Numbered
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
07-02-2026
Full replacement kit for es1832445
Used to seal the valve to the new adapter flange
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
06-13-2026
Replaces the failure-prone factory diaphragm for rock-solid boost control