Fiesta ST boost solenoid SiCo Developments We tried a 40mm core

We tried a 40mm core and where it worked well but on track we could still see improvements were needed and so we opted for a huge 50mm core 'normally found on our Cosworth radiators' it was perfect

improved freedom of wheel movement

these can help fitting with big boost pipe kits & aftermarket Intercoolers

HKS Direct Bright (DB) Meters are Electro-Luminescent version of the popular 60mm mechanical unit and is available for boost

Use of high performance linear race springs/li>

Fiesta ST boost solenoid SiCo Developments We tried a 40mm coreReplacement OE boost solenoid for a 2013+ Fiesta ST Due to the position of the boost solenoid next to the turbo it is very easy to get damaged. Also as cars become more powerful, we have found this item is prone to failing over time.