External exhaust system on original valves for engine Tjet Abarth – Alfa – Fiat – Lancia
Remove the upper rubber sleeve that connects the by-pass to the iron pipe that leads to the filter box (see photo).
apply our PCN system to the remaining free tube of the valve (as shown in the photo) taking care to insert it when it reaches the bottom until it feels the second click of the second fixing ring.
The orings are already moistened with grease for better smoothness and ease of insertion.
No other fixing is needed to remove it pull firmly upwards
to apply the yellow cap (present in the package) on the remaining free iron pipe where the previously disconnected sleeve was inserted (as shown in the photo).