HKS exhaust help
 

hi all, i have a HKS Hi-Power exhaust on my car which i want to take off and replace..now, ive been looking on the net and as far as i can make out this exhaust is a 3" cat back system can anyone confirm this?? i was under the impression it was a 2.5" one but i cant seem to find a 2.5" system listed anywhere. also im unsure if i have the standard downpipe fitted now either unless the HKS system narrows to 2.5" :brickwall can anyone help please

http://i53.photobucket.com/albums/g6...3042011977.jpg

mine is the super dragger as you know.lol, the rear section is 3" and the middle section tappers down to 2.5" to meet up to the standard downpipe. i would of thought it would be the same.

i hope so...although the standard dp uses a doughnut type gasket to conect to the centre section but i read that the hks system uses a flat type gasket which is another reason im unsure about my downpipe being the standard one... how can i check this?

mine was a flat gasket for standard downpipe to middle section. has it still got the cat in the downpipe? i changed all mine for a full 3" turbo back. I will see if got any pics of it on the phone.

yes it still has the cat in the dp

I would say its the standard one then. I havent got pics on my phone. Mine didnt blow with a flat gasket on it. I am now running with out one in there at the moment.lol

Also,dont forget the HKS/Blitz exhausts have different angled flanges, the bolt holes are at 9 and 3 oclock,whereas the standard flanges are at,i think, 7 and 2 oclock (been a long time since i ftted a standard flanged system LOL)

does that go for the dp end too?

although i did fit a nurspec r cat back on my bugeye which fitted with no issues (dp end)

A blitz nur spec r will fit to a std downpipe with a cat in,it will also fit to a decat downpipe which narrows to 2.5 inch by using a ring donut gasket.
If you have a 3' decat downpipe then there is no need for the donut gasket,you can simply use a flat gasket , i know as i have fitted/taken off a blitz, and a vortex to replace with the std oe exhaust. in the last 4 weeks

ive no idea if my dp is the standard one or not tbh,can a 2.5" system be fitted to a 3" dp

Yes possible by/via kit which selling Scoobyworld 3" to 2.5"



Jura

sorry,didnt make myself clearer,as i was going on the other thread by the o.p

If you have an HKS OR blitz full system and want to use different back boxes,this is what i meant, the HKS and Blitz Mid section has the 9 o clock 3 oclock backbox/midsection joint (not on about d/p flange)

so,if you want to fit another backbox to the hks/blitz midsection,you cannot fit say, a standard vortex backbox to the hks/blitz mid section (apart from them being 3",the flange holes are different)

Pic of my old HKS system (backbox/midsection joint) you can see the flange joint just below the Diff

http://i56.photobucket.com/albums/g1...oto-0004-6.jpg




Normal backbox flange nicked from the bay


http://i.ebayimg.com/22/!B90dg6QCWk~...nNh4Q~~_12.JPG