HKS Silent Hi-Power

[Hamilton]

I've done a fair bit of reading on here already but just wanted to see if anyone could give me some more specific feedback about the above exhaust.

 

My Supra is BPU with hybrid turbos, fully decatted, and currently has a 4" single box exhaust which I find a bit too loud, especially in built up areas. I'm looking to change the exhaust for something a bit quieter but not too quiet (I know that may not be very helpful!), and with less drone to it. Does anyone happen to have the same or similar spec car to mine with the HKS Silent Hi-Power, and if so could you tell me how you find the exhaust noise levels and note? I'm well aware that on a decatted car the HKS is far from "Silent", but that's actually what's making me consider it as I'd still like some noise, just not masses. Hope that makes sense!

 

Any input welcome, thank you.

[Dnk]

HKS Super Dragger on my UK car which was great but not too loud

[Dnk]

Try a youtube search for the HKS Silent hi power, there's a few videos i just found

[Dnk]

[shaky]

They do a few sorts of hi power , twin box ,single box, 3 inch and 3 half inch , i had the 3 half inch , single box , not as quiet as you might think, had a Dragger too , that is more quiet than the high power , both hang low .

[David P]

"Noise" and "Drone" are completely different animals.

 

Mostly regardless of volume, drone is caused by the Young Buck's obsession of having a tail-pipe large enough for a tramp to sleep in.

 

The larger the tail-pipe than the exhaust pipe, the louder the drone.

 

Think of; Trumpet or Tuba?

 

Same noise in, different sound out!

Edited July 20, 2020 by David P (see edit history)

[wile e coyote]

I have hks silent and great box

[tayr]

I find the silent hi power very tame. I like a bit of noise and it’s a bit quiet for me. But I didn’t fancy spending another few hundred quid to find out the noise isn’t that much different

[Bender]

I got HKS silent Hi power in my NA and it does job for me i was looking for something similar not too loud not too quiet and that exhaust tick all the boxes

[Boyne]

Hks hi power silent, however still needs a bung to pass noise dbs in mot/nct, and that's with 2nd cat still in, lovely sound from it though.

[Hamilton]

Thanks for all the replies so far everyone- really helpful, plus I've learned a couple of things!

 

At the very least is sounds as though most people who have this exhaust are happy with it, which is a good sign.

[MKIV_Danny]

I will have a HKS Silent HiPower to sell soon. It was mounted on my BPU+ Supra with first decat for less than 300miles.

However, it's a nice exhaust. Low to mid RPM it sounds more dull and bassy, but if you rev up it starts screaming and is loud. For my area (live in Austria) it's to loud. Police will kill me

let me know if you're interested