Just looking for some info here. Why would HKS make their exhaust only 75mm when it appears all other exhausts for the EVO are 80mm. Will there be a huge loss in performance compared to another exhaust?

 

75mm is 3 inches though isnt it? I've got the HKS universal carbon-ti muffler and it has a 75mm end that attaches to the RMR piping and it lines up perfectly.

here's a pic:

http://www.socalevo.net/gallery/phot...ch/meet28.html

 

Just did a conversion using this conversion tool:

http://www.onlineconversion.com/length_common.htm


75 millimeter = 2.9527559 inch

80 millimeter = 3.1496063 inch

 

I kow what your saying Rob but if you look into all other Japanese manufacturers, they are all running 80mm.

 

There shouldn't be much of a difference because it's not really the size of the piping that counts. Of course, horsepower is the biggest concern along with back pressure, sound, and weight savings, but I guess it's more on what you prefer depending on how you want to tune your car. If you're just gonna do minor bolt-ons to your ride, might as well go with HKS. It's cheaper than a JIC exhaust, which I have.

 

pics of hi power cat-back installed its 3 in. all the way
installed at gbmotorsports.com

 

here's another shot

 

perrin cat-delete pipe w/cel eliminator

 

^ does that bolt up to the stock cat? it looks like it does from the first pic...

hows it sound? anyway you could get a sound clip?

 

is that the jdm hi-power that fits short, or is that the USDM spec???????

 

OMG, those have got to be the worst photos I have ever seen. I am assumming that they were blown up or either taken with a camcorder.

 

depends how everyone else is measuring it - outer diameter or inner.....

 

old digicam lol since all the money's going to the evo camera later,you know how it goes.you have to take care whats important first and in this case its the EVO baby.
and those are usdm hi-power for the evo8 clears our bumper no problem but since hks just brought them out its a first come first serve basis.im trying to get the sound clips so sit tight.

 

[QUOTE]Originally posted by leif
[B]^ does that bolt up to the stock cat? it looks like it does from the first pic...

what cat? jk, the cat was taken off and replaced with perrin cat-delete/02 simulator.it all fits perfectly check them out at www.gb-motorsports.com in hayward

 

very nice