Mk1 Focus RS - Zetec Blacktop + ST170 AREA6 Up-rated Valve Spring Set Transmission Mean aggressive look

Mean aggressive look

By expanding the dynamic range and rate of response of your OEM controller

Genuine Ford Inner Wing Sound Deadening Foam Pieces for Mk1 Ford Focus RS

The Silicone hose is supplied by ROOSE and is available is Gloss Black or OE Black and in either standard length or +50% (300mm)

Mk1 Ford Focus RS Carbon Fibre Spark Plug Cover

Mk1 Focus RS - Zetec Blacktop + ST170 AREA6 Up-rated Valve Spring Set Transmission Mean aggressive lookTurbocharged and performance engines require more of a valve spring. The pressure within the intake valve is Boost pressure, and this acts upon the valve head, significantly reducing the valves seat pressure as the boost is trying to push the valve open. The same impact occurs on the exhaust valve head. Whilst Ford provided the Focus RS with a mildly uprated spring set to suit the turbocharged application, these become ineffective after 20psi boost,