rayman_2

Will the above DP fit onto a HKS system ?

ChristianR

iTrader: (1)

yes I don't see why it wouldn't, long as you get the one designed for your car

rayman_2

have you had experience of one ? performance ?

P20SPD

iTrader: (1)

Depends what type of HKS System it is?

Dragger

or

Hiper

It also depends which Downpipe you use

rayman_2

Its a HKS Hiper

P20SPD

iTrader: (1)

In that case, IMO you want the3" Downpipe from Hayward and Scott, with the flush exhaust flange at the bottom, so it meets neatly with the Hipers flush exhaust flange.

Thats what i have on my car ATM, and i have had a few different combinations.

Hope that helps

Steven

rayman_2

hi steve,

did it make a difference in sound and performance ?

Mickle

I've got the same as you, HKS Hyper. I did have the HKS decat downpipe but I'm swapping it for a Magnex twin dump 3" top to bottom jobby now.

P20SPD

iTrader: (1)

rayman_2

You taking about the downpipe or he whole system?

Hiper is LOUD IMO.

Performance, it seems to have freed up a little lower down grunt in my car, but then i suspected i was restricting it with the 2 previous systems.

rayman_2

the downpipe, split between the tsl or hayward one.

P20SPD

iTrader: (1)

Always had open neck ones just changed between 3" through and 3" tapering to 2.5".

Andy Tang

iTrader: (3)

I had a bog standard Scoobysport downpipe (2.5") made by H&S, with a HKS Hiper.

No fitting issues!

P20SPD

iTrader: (1)

Andy, i just thought the 3" was better suited to the Hiper, and the 2.5 better suited to the Dragger. Maybe wrong?

Andy Tang

iTrader: (3)

Both the Super Dragger and the Hiper have 3" pipework.

I was told to keep the 2.5" downpipe to get some sort of back pressure and help spool up.

So yes a 2.5" downpipe will fit, although a 3" maybe better, depending on other modifications.

Mickle

I thought that turbo wizard man said back pressure is a no-no on turbo cars. The less the better, hence 3" is better.

P20SPD

iTrader: (1)

i know the dragger and hiper are 3" systems, i just thought the style of the flange where it joins the downpipe is different, the dragger being designed to suit the standard downpipe better, which is 2.5".

Bob Rawle

Flanges are the same for both HKS systems, both "std" and 3" downpipes will mate up to either no problem.

As to performance the Hiper is a less restrictive exhaust by far, I run the 3" version with a Hiper ... seems to work.

cheers

nom

Bit noisy though?
Nice mix is Drager & BPM twin-dump. Mmmm. Smoothie
Although I doubt you'd shift Bob-type power through them

P20SPD

iTrader: (1)

Cheers Bob, think that confirms that the Dragger i had, was not a Dragger centre section.

Hiper is nice, liveable so far, even without the bung.

rayman_2

is it essential you keep the oxygen sensor connected on earlier cars on the DP ?

Jay m A

iTrader: (2)

Locating the sensor in the downpipe as opposed to the headers is better in terms of its exposed to lower EGTs, hence lasts longer (I think ) but its not essential that you do this.