⭕ German made reproduction of the 1974 Porsche slide valve system for a 2.3 ST, 2.5ST, 2.8RSR and 3.0RSR.
The workmanship on this system is absolutely beautiful.
The system has several internal improvements over the original including and improved and higher quality bearing setup and much tighter tolerances and is not as prone to sticking as the original system.
The system is made in the original 43mm version.
Use this with an RSR mechanical injection pump and injectors or with electronic injectors and MOTEC or a similar control system for your vintage street or race engine. Many say the slide valve system can give you several hp over a butterfly system, as free flow is provided without the restriction and resulting turbulence of the butterfly shaft and throttle plate.
The system has been street and track proven and is just plain awesome!

Depending on the racing body, these slide valve systems are homologated for engines 2.3l and up, not just 3.0l engines as many think.