Whistling TrumpetSuits GFB Blow-Off Valves

Crazy loud whistle on full atmosphere!

My experience- i30N DCT hatch.
Delivers a high pitched whistle when lifting off heavy throttle, and the occasional “WRC style” chirp.
Slightly more whistle than the standard trumpet - just not the traditional “ptututu” sound
Still good though

Easily fitted this in place of the standard trumpet on my cerato GT with GFB response bov set at 50/50 recirc. It is hard to notice any whistle from this new part. I think the sound has changed slightly higher pitched; but it doesn't "chirp" or squeak like an old school HKS SSQV. Maybe the distance of the bov from the turbo lessens the effect, I'm not sure. I have some adjustment left to play with to try and improve.

The product is what it claims. I did have some fitment issues on a kia stinger as the manifold pushes the trumped into the opposing BOV. Thats not a product issue thats a kia design issue. I got them both in with a little.... persuasion. The sound, to me personally I think could have abit more kick, Im still trying to find the right release pressure for maximum sound but also having some length to the note. For the price of the product, its worth the purchase. A trumpet that's designed to flutter as opposed to turbo fluttering itself would be mint aswell

Doe what it’s supposed to do with the usual prompt delivery.