Peugeot Boxer, Expert. Just remove the plastic engine cover, remove the 2 bolts, slip in the plate and put the 2 bolts back in. Other Benefits of blocking EGR Citroën Relay. This is made from laser cut 1.5mm Stainless Steel and has been rumbled to make it smooth.It gives a cleaner pickup at lower revs because it blocks the of exhaust gas being recycled.
