Hi Guys

I am running a Harvey Gibbs 380bhp engine...
T34.48
Siemens 55 Lb injectors etc...

At the moment i have no dump valve and get ALOT of chatter when i come off the accelerator.

What dump valve is best for the YB, i am not after a loud whoooooosh noise either.

Any advise on whats best to buy.

Thanks Guys