Uprated, adjustable twin piston air recirculating dump valve in machined aluminium for all integrale and Evo models. 

Comes with an additional uprated spring for 1.3 - 3 BAR.

Machined, aluminium, vent to atmosphere, piston dump valve.

Suitable for boost up to 1.3 Bar & a stiffer spring is included for 1.3 - 3 Bar competition cars.

This atmospheric diverter valve dumps the charge-air to atmosphere creating the "Whoosh" sound when the throttle is lifted. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably.

Silicone Blow Off Bypass Valve Blank 28mm

Exhaust down pipe with flexible section for Lancia Delta integrale 8v, 16v & Evolution 1. As original, hot-dip galvanized steel with braided stainless steel flexible section. Made in Italy by an original equipment supplier.