If you got a E7 fq-300 HKS dont do a bov for it only for the standard E7 & that dont always work, i've had a mare with mine got a Forge bov at the mo which is working v well but its a recirculating one.
Can check through all HKS stuff if you go to www.hkseurope.com & they list all the suppliers for the uk as well with numbers etc

Can check through all HKS stuff if you go to www.hkseurope.com & they list all the suppliers for the uk as well with numbers etc