Recommended dump valves...

[Lil SpecR]

I have the HDev one. I'm stage1a at approx 300bhp. 1.1 bar. It's louder than stock for sure. I would say the whoosh is entertaining without being OTT.

Thanks! Its gonna be a long time in the making but I will be slowly tuning mine up so future proofing with the right parts is important
I don't want stupid whoosh but i defo want to hear it

 

[Lil SpecR]

Thanks for everyones inputs! I ended up dropping on an HKS SSQV4 so thats arrived today and will be fitted with recirc when I collect my car!