de-cat will do naff all unless you do other mods such as new inlet etc...

if you are planning on tuning with a new inlet or throttle bodies, get a de-cat. if not, get a cat-back.

quote:

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Originally posted by matts_16v
ive a magnex cat back system from tweeks with a de-cat pipe. im very happy with it!

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ive a magnex cat back system from tweeks with a de-cat pipe. im very happy with it!

De-cat will be better for performance as they less resistrictive, bare in mind they are not road legal, emissions will be higher and your car will fail its MOT with a decat on.

I only have a backbox on mine.

Does me, as I can't stand super loud exhausts.

cool,

ive bin lookin in the new demon teeks mag and have seen a magnex full system (cat back) for £299.

is that decent?
think it was you who told me to go for a magnex. apparantly sound decent.:boggle:

I have a de-cat on my 1.6

Did notice a slight difference bottom end.

i have a cat back and a cat

have tried a decat, then a silenced decat, but ended up finding marginal difference, so went back to a cat

so what are you runnin on your car at the moment mate??

will it make any difference when i put a manifold on??

decat

well you can fit both, either a cat back on its on with the cat, or a cat back with a decat pipe.

the decat is spose to free up some power, but i just found mine was louder, so changed it back

cheers mate. so which would be better for peformance??:o

cat back bolts on to exhaust after the cat, keeping cat in place

decat is a pipe that fills the gap left when you remove the cat

hey all,

sorry to sound thick but can anyone tell me the difference between a cat back system and a de cat.

which is better for power etc???

dave:thumbs: