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  • 4 weeks later...

the hiflow cat is an oxymoron.

It should be called the 'no-flow cat'. Remove it and the power will rise especially at the boosting point onwards. Have a look inside a so called hiflow cat and you will notice that the cross section is well over 50% (very conservative) blocked by catalyst.

You can easily get a de-cat pipe made with a convenient 3 bolt flange so you can remove and replace for street or motorsport.

if you're interested in a hf cat, a guy on these forums can get catco 3 inch ss for about 160 i think. check the fs section

as for punching the cat, ive *heard* that this causes turbulance that will slow u down if anything. but wen my mate did it, his car felt a lot quicker, so who no's?

but if u wanna risk it, or for track, then id say get a catout pipe too - no restrictions there...

In some countrys cat convertors are banned!! Why you ask? Well as soon as they are passed there used by date (approx 40K-60K Klms) they stop working and start putting out very bad emmisions indeed. After speaking to some people in the automotive industry, its quite abviously a nice little scam indeed. Don't feel bad if you don't have one, as long as your car is in good tune the enviroment is probably better off than with a clogged/stuffed cat.

MAN I AGREE TOTALLY WITH THE TONKAU, CATS ARE A LOAD OF SHITE THEY NEVER WORK UNLESS THYRE NEW

ANYWAYS FOR ALL YOU TREE HUGGERS WORRIED ABOUT EMISSIONS DON'T BUY A SKYLINE AS THEY ARE THE WORST FOR EMISSIONS ANY WONDER WHY THE JAPS AREN'T MAKING THE RB SERIES ENGINE??? AND IF YOU ARE A TREE HUGGER BUGGER OFF OUR SITE

Originally posted by the_tonkau

Well as soon as they are passed there used by date (approx 40K-60K Klms) they stop working and start putting out very bad emmisions indeed.  

Hi.

I've heard this before,

is there anyway to prove that if you were caught without a cat at all, some sort of Cert or something

SIKR33: calm down:)

When your car gets 'complied', they replace the CAT for that exact reason...

Well as soon as they are passed there used by date (approx 40K-60K Klms) they stop working and start putting out very bad emmisions indeed. After speaking to some people in the automotive industry, its quite abviously a nice little scam indeed. Don't feel bad if you don't have one, as long as your car is in good tune the enviroment is probably better off than with a clogged/stuffed cat.
Well as soon as they are passed there used by date (approx 40K-60K Klms) they stop working and start putting out very bad emmisions indeed. After speaking to some people in the automotive industry, its quite abviously a nice little scam indeed. Don't feel bad if you don't have one, as long as your car is in good tune the enviroment is probably better off than with a clogged/stuffed cat.

Dont mean to highjack the thread but does this apply to personal compliance aswell? Cause my cat was MESSED up when i bought it. Personal compliance tho....they let you get away with a few things aye :D I had snow tyres on my beast when i bought it :blah:

Nasty Nasty things in wet conditions :(

Originally posted by Jimbo2000

Hi.

I've heard this before,

is there anyway to prove that if you were caught without a cat at all, some sort of Cert or something

SIKR33: calm down:)

In vic the coppers can send you to the epa to have an emissions test. If its not right when you go in then your up for a big fine...

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