Dump valve as standard

[CRAIGLCR]

i have a bailey DV26D dump valve. this is a twin piston dump valve so dumps to atmosphere. ive had it fitted now for 18 months and the car has never thrown up a fault code???? touch wood anyway!!!! this together with the BMC CDA makes quite a loud dumping noise.

 

[Bogwoppit]

It might throw a fault code with that dump valve if you get it remapped though.